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2022| January-March | Volume 25 | Issue 1
Online since
January 21, 2022
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REVIEW ARTICLE
Clinical application of viscoelastic point-of-care tests of coagulation-shifting paradigms
Soumya Sankar Nath, Chandra Kant Pandey, Sumit Kumar
January-March 2022, 25(1):1-10
DOI
:10.4103/aca.aca_319_20
PMID
:35075014
Bleeding during cardiac surgery, liver transplant, trauma and post partum hemorrhage are often multifactorial and these factors are dynamic as new factors crop up during the course of management. Conventional tests of coagulation offer information of a part of the coagulation system and also is time consuming. Viscoelastic point of care tests (VE POCTs) like rotational thromboelastometry, thromboelastogram and Sonoclot, are based on analysis of the viscoelastic properties of clotting blood and provide information for the entire coagulation pathway. In this comprehensive review being presented here, we have examined the pros and cons of VE POCTs including clinical, cost and survival benefits. The recommendations of the various guidelines regarding use of VE POCTs in various scenarios have been discussed. The review also tried to offer suggestions as to their optimal role in management of bleeding during cardiac surgeries, extracorporeal membrane oxygenation, left ventricular assist devices, liver transplant and briefly in trauma and postpartum hemorrhage.
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ORIGINAL ARTICLES
Analysis of anticoagulation therapy related complications in patients with prosthetic valves: Our experience
Vikrampal Singh, Arun Garg, Gurmeet Singh, Samir Kapoor, Sarju Ralhan, Rajesh Arya, Bishav Mohan, Gurpreet S Wander, Rajiv K Gupta
January-March 2022, 25(1):67-72
DOI
:10.4103/aca.aca_125_21
PMID
:35075023
Purpose:
The aim of this study is to analyze anticoagulation-related complications in patients following mechanical valve replacement and factors influencing the outcome.
Materials and Methods:
A total of 250 patients were analyzed during OPD follow-up for anticoagulation-related complications and various factors influencing outcome. Patients received prosthetic valve at mitral and/or aortic or both.
Results:
Out of 250 patients, 48% were male and 52% were female. The mean age was 41.9 ± 14.4. A total of 139 had mitral valve replacement (MVR), 70 had aortic valve replacement (AVR), 40 had double valve replacement (DVR), and 1 patient had triple valve replacement. Valves implanted were mechanical bileaflet valve. The mean international normalization ratio (INR) in the study was 2.4 ± 0.56. A total of 49 events occurred during follow-up, of which 4.5% per patient years were anticoagulation-related hemorrhagic events and 4.8% per patient years were thromboembolic events. Among thromboembolic events, valve thrombosis occurred in 10 patients and cerebrovascular accidents occurred in 11 patients. Mean INR for thromboembolic events was 1.46 ± 0.25 and anticoagulation-related hemorrhagic events was 4.4 ± 1.03. Mortality rate was 1.6% in AVR, 4% in MVR, and 0.4% in DVR groups; about 34% of patients needed dose modification of Acenocoumarol and reason for derangement of INR was associated with infectious process and poor compliance; 85% of cases showed good compliance for daily anticoagulation therapy.
Conclusion:
Anticoagulation for mechanical valve replacement can be managed with INR range of 2.0 to 2.5 in MVR and 1.5 to 2.0 in AVR with acceptable hemorrhagic and thromboembolic events. We must educate and counsel the patients during follow-up for better compliance to optimal anticoagulation.
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CASE REPORTS
Role of transesophageal echocardiography in the recurrent biatrial myxoma of uncommon origin
Ganesh K Munirathinam, Bhupesh Kumar, Harkant Singh
January-March 2022, 25(1):85-88
DOI
:10.4103/aca.ACA_71_20
PMID
:35075027
After surgical excision of myxoma recurrence usually happens adjacent to the initial origin site. We report a case of recurrent myxomas in a young male patient that had biatrial recurrence with one tumor originating very unusually from the base of the anterior mitral leaflet. Intraoperative transesophageal echocardiography was instrumental in localizing the site of the origin of left atrial myxoma from the base of the anterior mitral leaflet and in detecting an additional myxoma attached to the wall of the right atrium.
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Pectoral-intercostal fascial plane block in chronic post-sternotomy pain
Rajendra K Sahoo, Rajesh Kar, Roushan Patel, Mukesh Kumar, Debasis Giri, Mithun Biswas, Abhijit S Nair
January-March 2022, 25(1):97-99
DOI
:10.4103/aca.ACA_62_20
PMID
:35075030
Persistent poststernotomy pain (PSP) is a well-known entity following cardiac surgery done with midline strenotomy. The severity of pain is usually mild to moderate in the majority of the patients. However, a small percentage of patients develop severe and persistent pain and need aggressive treatment. Our patient, a 63-year-old lady developed chronic severe parasternal pain following coronary artery bypass graft surgery. As multiple medications did not relieve her pain effectively, we did an ultrasound-guided pectoral-intercostal fascial plane block to which she responded with excellent and long-lasting pain relief. This is the first such case report of the use of this novel block technique for treating PSP.
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Bilateral superficial serratus anterior plane block in a pediatric patient for post-operative analgesia undergoing asd repair via median sternotomy- A case report
Prabhat Tewari, Kushal Hajela, Syed Shabbir Ahmad
January-March 2022, 25(1):116-118
DOI
:10.4103/aca.aca_113_21
PMID
:35075035
Serratus Anterior fascial plane (SAP) block is a high-volume interfascial plane block that has been used in adult patients in cardiac surgery with good postoperative pain relief. We report a case of a 9 year old female child who underwent ostium secundum atrial septum defect closure and was given bilateral SAP block. The patient was extubated within 4 hours of surgery and was pain free in the postoperative period without the use of any opioids.
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Tapias syndrome after cardiac surgery
Reshmi L Jose, G Gopan, Poornima Kasthuri, Thushara Madathil
January-March 2022, 25(1):123-124
DOI
:10.4103/aca.ACA_200_20
PMID
:35075037
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ORIGINAL ARTICLES
Euvolemic off pump coronary surgery further improves early postoperative outcomes
Kaushalendra Rathore, Evan Boon, Reza Yussouf, Mark Newman, William Weightman
January-March 2022, 25(1):11-18
DOI
:10.4103/aca.ACA_139_20
PMID
:35075015
Background:
Fluid resuscitation during Off-Pump Coronary Surgery (OPCABG) is still not protocolized and depends on multiple variables. We are exploring in this study whether a restrictive or euvolemic approach has any impact on short term surgical outcomes following OPCABG.
Methods:
It is a retrospective study of 300 patients analyzed based on the intraoperative fluid requirement with 150 patients in each group (Group I: Fluid <2 Litres, Group II: Fluid >2 Litres).
Results:
Multivariable analysis showed echocardiography variables such as E/e ratio, LA volume index, and atrial fibrillation (AF). LA volume index is related to the higher fluid requirement. Group II had significantly higher ventilation time (
P
< 0.05), drain output (
P
= 0.05), drain removal time (<0.05), inotropic requirement, and diuretic use.
Conclusion:
The requirement of the intraoperative fluid was associated with various factors including diastolic dysfunction (left atrial volume index, left ventricle mass index, E/e ratio) and preoperative dual antiplatelet use. Group II patients had longer ventilation time, diuretics use, high drain output, and required drains for a longer period of time. Although there was no statistical difference among two groups as far as postoperative AF concerned, a reversal of AF to sinus rhythm was delayed in group II patients.
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CASE REPORTS
Parosmia and dysgeusia after intravenous propofol-based general anesthesia: A case report
Nayab Farzana, Prabhat Tewari, Sanjoy Sureka, Aanchal Dixit
January-March 2022, 25(1):112-115
DOI
:10.4103/aca.ACA_93_21
PMID
:35075034
Various drugs, including anesthetic agents, can cause parosmia in the perioperative period. There are reported cases of patients with alterations of smell and taste due to local anesthetics, nerve damage, or as a side effect of general anesthesia. We present a case of a 58-year-old male who developed parosmia and dysgeusia in the postoperative period after radical nephrectomy and inferior vena cava thrombectomy. The anesthetics used were fentanyl and propofol for general anesthesia and ropivacaine for epidural analgesia. Clinical examination did not reveal any pathology.
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Unforeseen rupture of pseudoaneurysm of common carotid artery: An arduous anesthetic challenge
Devishree Das, Sandeeep Chauhan, Sambhunath Das, P Praveen
January-March 2022, 25(1):119-122
DOI
:10.4103/aca.aca_257_20
PMID
:35075036
Pseudoaneurysm of the common carotid artery (CCA) is exceptionally unstable and unpredictable; it mandates quick medical attention in order to circumvent neurologic sequelae or hemorrhage. Unanticipated rupture is extremely lethal and a potential provocation for the anesthesia caregiver. It is an arduous challenge for an anesthetist to establish emergency airway when a huge bleeding pseudoaneurysm is compressing and deviating the trachea, securing invasive lines in collapsing vessels, volume and vasopressor resuscitation in deteriorating hemodynamics in order to maintain cerebral perfusion without compromising other vital organs, arranging huge amount of blood and blood products in a short span of time, and transferring an exsanguinating patient for the rapid institution of cardiopulmonary bypass. Not only preoperatively it also necessitates appropriate neuromonitoring and neuroprotection during and after surgery. The association of unforeseen rupture of common carotid artery pseudoaneurysm secondary to the tubercular spine and lifesaving management by the rapid institution of cardiopulmonary bypass (CPB) is a rare occasion. To the best of the authors' knowledge, there is not any similar case in the peer-reviewed literature. Therefore, the authors enumerate the clinical experience of an unexpected rupture of CCA pseudoaneurysm requiring lifesaving CPB and emphasize the “Timely Teamed Effort Approach” that can sustain a life in such an inevitable situation.
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Pulmonary embolism initially misdiagnosed as perimyocarditis in a young patıent
Oguz Kilic, Alperen E Akgun, Furkan Ufuk, Ipek Buber, Ismail D Kilic
January-March 2022, 25(1):100-102
DOI
:10.4103/aca.ACA_121_20
PMID
:35075031
Pulmonary embolism is a common cardiovascular emergency. In case of delayed diagnosis and treatment morbidity and mortality is high. In this report, we presented a case of pulmonary embolism without apparent risk factors, which was initially misdiagnosed as peri/myocarditis.
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Management of video-assisted thoracoscopic (VATs) bilateral cardiac sympathectomy in refractory ventricular storm: A case report
Gayatri R Sakrikar, Madhavi Buddhi, RD Patel, Shraddha S Mathkar
January-March 2022, 25(1):103-106
DOI
:10.4103/aca.ACA_106_20
PMID
:35075032
A 65-year-old male post-CABG surgery presented with history of ventricular storm refractory to antiarrhythmics and requiring multiple DC shocks. He got posted for VATs bilateral cardiac denervation for sympathetic remodulation. Patient was induced with high dose opioids and Etomidate and intubated with 37Fr left double lumen tube. A multidisciplinary approach was planned to tackle peri-operative cardiac event along with the placement of invasive monitors. Events that might lead to sympathetic overactivation because of laryngoscopy, pain, capnothorax, and surgical handling were kept in mind and avoided with optimum depth of anesthesia, analgesia, and pharmacological sympatholysis. There was no major cardiac event intraoperatively as well as in postoperative period.
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Safety and efficacy of video DLT (VDLT) for lung isolation during the COVID-19 pandemic
Sathish Kumar Dharmalingam, Gladdy George, Kirubakaran Davis, Balaji Kuppuswamy, Birla Roy Gnanamuthu, Raj Sahajanandan
January-March 2022, 25(1):107-111
DOI
:10.4103/aca.aca_239_20
PMID
:35075033
One lung ventilation (OLV) with collapse of the ipsilateral lung is a prerequisite for most thoracic surgical procedures. Double-lumen tube (DLT) is still the preferred method to isolate the lungs and fiberoptic bronchoscopy (FOB) is the gold standard for the confirmation of correct placement of the DLT. However, both these procedures are considered as a high-aerosol-generating procedures and are hazardous to the health workers, particularly at this time of the COVID-19 pandemic. We did nine thoracic surgery cases categorized as essential, requiring OLV during the ongoing period of the COVID-19 between April 2020 and May 2020 where we used Full view DLT for lung isolation. We present our case series which shows that the Full view VDLT can minimize or circumvent the use of FOB during OLV, and reduce the time taken to isolate the lungs thus reducing aerosol in the theater. None of the nine patients required FOB for confirmation of initial positioning nor for diagnosis of intraoperative malposition. The time taken to isolate the lungs was significantly less and the surgical positioning was done under real-time monitoring by visualizing the blue cuff distal to carina at all times. The real-time monitoring by the Full view VDLT offers the additional advantage of detecting any malposition even before it results in loss of isolation or desaturation. We conclude that the Full view VDLT is an efficient and safe alternative for lung isolation at this time of the COVID-19 pandemic.
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Transesophageal Echocardiography (TEE) probe insertion causing accidental extubation in a child undergoing ventricular septal defect closure
K Pavan Prasad, Balswaroop Sahu, Praveen K Neema
January-March 2022, 25(1):124-126
DOI
:10.4103/aca.aca_152_21
PMID
:35075038
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Transcatheter Aortic Valve Replacement (TAVR) in thalassemic patients
Yatin Mehta, Amrita Guha, Ravinder Sawhney, Rajiv Juneja, Praveen Chandra, Nagendra Chauhan, Naresh Trehan
January-March 2022, 25(1):126-127
DOI
:10.4103/aca.aca_289_20
PMID
:35075039
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The twisty tube chronicle: When in doubt, take it out!
Hemant D Waikar, Praveen Kumar Neema
January-March 2022, 25(1):127-129
DOI
:10.4103/aca.aca_195_21
PMID
:35075040
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The role of echocardiography in the management of structural valve degeneration of transcatheter valves
Rahul Shabadi, Pushkar Desai, Nasser Al-Kemyani, Hatim Al-Lawati
January-March 2022, 25(1):89-92
DOI
:10.4103/aca.ACA_158_20
PMID
:35075028
Transcatheter valve implantation in patients with aortic stenosis has evolved as an acceptable alternative to surgical aortic valve replacement in a subset of patients at excessively high risk from surgery. The structural valve degeneration (SVD) is a known phenomenon in catheter-based valves too, which was hitherto seen with surgical bioprosthetic valves. Echocardiography plays a pivotal role not only in early detection but also in the management of SVD of Transcatheter valves. The goal of this report is to agglomerate our experience of an unusual case of SVD of a catheter-based valve implanted inside the bioprosthetic aortic and mitral valve apparatus and its management with aortic and mitral valve replacement with mechanical valve prosthesis.
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Epicardial pacemaker insertion in a preterm very low birth weight neonate – An anaesthetic challenge
Avneet Singh, Ganesh Kumar, Kulbhushan Saini, Gangadharan Prabhakaran
January-March 2022, 25(1):93-96
DOI
:10.4103/aca.ACA_94_20
PMID
:35075029
Congenital complete heart block (CCHB) has an incidence of one in 20,000 live births and carries a 20% risk of mortality. The hemodynamic instability due to bradycardia and asystole due to the increasing metabolic demands can be avoided by appropriate antenatal planning, timely delivery and initiation of medical treatment and early pacemaker insertion. In this report, we discuss the anaesthetic challenges of permanent epicardial pacemaker insertion with good outcomes in a 32-week gestational age 1380 grams neonate within a few hours of birth.
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Extracorporeal cardiopulmonary resuscitation for an out-of-hospital cardiac arrest
Suresh G Nair, Jobin Abraham, Johnson Varghese, Manoj P Nair, Raja Shekar Varma
January-March 2022, 25(1):73-76
DOI
:10.4103/aca.aca_308_20
PMID
:35075024
Extra corporeal membrane oxygenation (ECMO) for refractory out-of-hospital cardiac arrest (OHCA) has been shown to improve outcome in many Western countries. There are no reports of ECMO being used to support OHCA in India till date. We report a case of a young man who developed cardiac arrest (CA) while driving and was given bystander cardiac massage. He was brought to tertiary care center where an ECMO was utilized for refractory CA. The patient subsequently underwent emergency coronary artery stenting and was weaned off ECMO and ventilation. We discuss the case and highlight the role of bystander cardiopulmonary resuscitation.
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Intraoperative echocardiographic contrast opacifies the left atrial appendage and assists in surgical exclusion
Jeans M Santana, Frank M Rosell, Bhawana Dave, Aimen El Manafi
January-March 2022, 25(1):77-80
DOI
:10.4103/aca.ACA_192_20
PMID
:35075025
Surgical exclusion of the left atrial appendage (LAA) for stroke prevention in atrial fibrillation is frequently incomplete and remains to be optimized. We present a man who did not tolerate anticoagulant and failed percutaneous occlusion. Intraoperative echocardiographic contrast was used to assist surgical exclusion. Follow-up showed a persistent occlusion.
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Symptomatic aberrant right subclavian artery—A case report and anesthetic implications
GJ Murukendiran, Prasanta Kumar Dash, Aspari M Azeez, Nithiyanandhan Palanisamy, Shivanesan Pitchai
January-March 2022, 25(1):81-84
DOI
:10.4103/aca.ACA_145_20
PMID
:35075026
Vascular compression of the esophagus by an aberrant right subclavian artery (aRSA) leading to dysphagia is a rare occurrence. There has been a significant advancement in the diagnostic and surgical treatment modalities available for this disorder. Anesthetic management has evolved too and this case report highlights the anesthetic management of a 41-year-old woman presenting with symptoms of dysphagia because of compression of esophagus by an aRSA, who subsequently underwent re-implantation of aRSA into ascending aorta.
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ORIGINAL ARTICLES
Is Indexed Left Atrial Volume (LAVi) in Indian Patients with Acute Coronary Syndrome (ACS) undergoing revascularization a predictor of cardiovascular outcomes?
Abhishek Saklecha, Aditya Kapoor, Ankit Sahu, Roopali Khanna, Sudeep Kumar, Naveen Garg, Satyendra Tewari, Pravin Goel
January-March 2022, 25(1):19-25
DOI
:10.4103/aca.ACA_129_20
PMID
:35075016
Background:
Left atrial volume indexed to body surface area (LAVi) is the recommended method for LA size quantification. Assessing LAVi in Indian patients undergoing coronary interventions for acute coronary syndrome (STEMI, NSTEMI, and UA) is clinically relevant.
Methods and Results:
Amongst 190 patients (66.4 yrs, 68.4% males), 29.5%, 40.5%, and 30% respectively had STEMI, NSTEMI and UA. Mean LAVi was 32.29 ± 12.06 ml/m
2
and 111 (58.4%) had LAVi ≥32 while 79 (41.6%) had LAVi <32. Patients were divided into 2 groups (group 1 LAVi >32 and group 2 LAVi <32). Group 1 patients had higher prevalence of TVD [n = 49 vs
n
= 5,
p
= <0.001] and higher mean Syntax score (24.47 vs 14.64,
p
= <0.001). Despite similar LVEF, those with higher LAVi had had higher incidence of mild MR (50.4 vs 27.8,
P
= 0.0002) and moderate/severe MR was present only in Group 1 patients (27.9% and 5.4%). Grade I, II, and III diastolic dysfunction was present in 71.2, 17.1, and 9.9% patients in Group 1 vs 45.6%, 0%, and 0% in group 2. Diastolic parameters like septal E/e' and lateral E/e'ratio were also higher in Group 1. Major adverse cardiovascular events (MACE) at 30 days was significantly higher in group 1 (20.7 vs 6.3%,
P
= 0.006). On multivariate analysis, triple vessel disease and LAVi were the only predictors of MACE while LVEF was not. ROC curve analysis for LAVi demonstrated that a cut-off 33.35 ml/m2, predicted 30 day MACE with Area under curve (AUC) 0.775 (95% CI 0.700-0.850); sensitivity and specificity of 86.7% and 61.4%. Inter-quartile analysis of LAVi (<26.3, 26.3-33.35, 33.36-36.3, and >36.3 ml/m2) demonstrated that 30 day MACE increased across quartiles (4.16%, 4.25%, 22.44%, and 28.26%, respectively,
P
< 0.001).
Conclusion:
Amongst patients with ACS undergoing revascularization, those with higher LAVi had more severe CAD, diastolic dysfunction and higher 30 day MACE. LAVi provides superior prognostic information as compared to conventional LV systolic and diastolic parameters in patients with ACS and should be incorporated in routine echocardiographic analysis. More studies with larger numbers and longer follow up are required to further elucidate on this.
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Comparison of epidural analgesia with ultrasound-guided bilateral erector spinae plane block in aorto-femoral arterial bypass surgery
S Ragavendran, C Raghu, SR Prasad, Thanigai Arasu, PS Nagaraja, Naveen G Singh, N Manjunath, N Muralikrishna, N Yogananth
January-March 2022, 25(1):26-33
DOI
:10.4103/aca.ACA_23_20
PMID
:35075017
Objective:
Thoracic Epidural Analgesia (TEA) was compared with ultrasound-guided bilateral erector spinae plane (ESP) block in aorto-femoral arterial bypass surgery for analgesic efficacy, hemodynamic effects, and pulmonary rehabilitation.
Design:
Prospective randomized.
Setting:
Tertiary care centre.
Participants:
Adult patients, who were scheduled for elective aorto-femoral arterial bypass surgery.
Interventions:
It was a prospective pilot study enrolling 20 adult patients who were randomized to group A (ESP block = 10) and group B (TEA = 10). Monitoring of heart rate (HR) and mean arterial pressure (MAP) and pain assessment at rest and deep breathing using visual analog scale (VAS) were done till 48-h post-extubation. Rescue analgesic requirement, Incentive spirometry, oxygenation, duration of ventilation and stay in Intensive Care Unit (ICU) were reported as outcome measures. Statistical analysis was performed using unpaired Student T-test or Mann-Whitney U test. A value of
P
< 0.05 was considered significant.
Results:
HR was lower in group B than group A at 1 and 2 h post- surgery and at 0.5, 16, 20, and 32 h post-extubation (
P
< 0.05). MAP were lower in group B than A at 60, 90, 120, 150, 180, 210, 240, 270 minutes and at 0 hour post-surgery and at 4 hours, every 4 hours till 32 hours post-extubation (
P
< 0.05). Intraoperative midazolam and fentanyl consumption, ventilatory hours, VAS at rest, incentive spirometry, oxygenation, and ICU stay were comparable between the two groups. VAS during deep breathing was more in group A than B at 0.5, 4 hours and every 4 hours till 44 hours post-extubation. The time to receive the first rescue analgesia was shorter in group A than B (
P
< 0.05).
Conclusion:
Both ESP block and TEA provided comparable analgesia at rest. Further studies with larger sample size are required to evaluate whether ESP block could be an alternative to TEA in aorto-femoral arterial bypass surgery.
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Exploring the association of fibrinogen and CRP with the clinical spectrum of CAD and periprocedural outcomes in patients undergoing percutaneous coronary interventions
Vijay Khandelwal, Aditya Kapoor, Danish Kazmi, Archana Sinha, Shiridhar Kashyap, Roopali Khanna, Sudeep Kumar, Naveen Garg, Satyendra Tewari, Ankit Sahu, Pravin Goel
January-March 2022, 25(1):34-40
DOI
:10.4103/aca.ACA_3_20
PMID
:35075018
Background:
The pathophysiology of an atherosclerotic plaque is mediated by the mechanisms involving thrombus formation and systemic inflammation. While C-reactive protein (CRP) levels are useful in predicting a cardiovascular event in intermediate risk population, the usefulness of routinely measuring fibrinogen in patients with acute coronary syndrome (ACS) is debatable. Also, data on the association of these markers with periprocedural outcomes in patients undergoing percutaneous coronary interventions (PCI) is scarce.
Aims:
The study aimed to determine whether the levels of fibrinogen and CRP vary across the different spectra of CAD and whether they have any correlation with cardiac Troponin I levels.
Materials and Methods:
A total of 284 patients with coronary artery disease undergoing percutaneous coronary intervention were included in the study. Complete blood count, serum lipid profile, serum CRP, fibrinogen, and troponin I were measured for all patients.
Results:
Patients with STEMI had significantly higher levels of CRP as compared to those with unstable angina (USA) and chronic stable angina (CSA). Patients presenting with ACS had significantly higher baseline fibrinogen as compared to those with CSA. A significant positive correlation between CRP and admission Troponin I (
r
= 0.50;
P
< 0.05) as well as fibrinogen and admission troponin I (
r
= 0.30;
P
< 0.05) was observed. The CRP levels were significantly higher in 15 patients with periprocedural MI as compared to those who did not develop periprocedural MI.
Conclusions
: The levels of the markers of inflammation and atherothrombosis vary with presentation across varied spectra of CAD with generally higher levels in acute presentation and in those who develop periprocedural MI.
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Time Limiting Boundaries of Reversible Clinical Death in Rats Subjected to Ultra-Deep Hypothermia
Evgeniy L Gagarinskiy, Aleksey S Averin, Viktor K Uteshev, Pavel V Sherbakov, Vladimir I Telpuhov, Nikolay E Shvirst, Yulya A Karpova, Artem E Gurin, Aleksandr V Varlachev, Anatoliy L Kovtun, Eugeny E Fesenko
January-March 2022, 25(1):41-47
DOI
:10.4103/aca.ACA_189_20
PMID
:35075019
Background:
It is well known that body temperature maintenance between 20 and 35°C prevents hypoxic damage. However, data regarding the ideal duration and permissible temperature boundaries for ultra-deep hypothermia below 20°C are rather fragmentary. The aim of the present study was to determine the time limits of reversible clinical death in rats subjected to ultra-deep hypothermia at 1–8°C.
Results:
Rat survival rates were directly dependent on the duration of clinical death. If clinical death did not exceed 35 min, animal viability could be restored. Extending the duration of clinical death longer than 45 min led to rat death, and cardiac functioning in these animals was not recovered. The rewarming rate and the lowest temperature of hypothermia experienced did not directly influence survival rates.
Conclusions:
In a rat model, reversible ultra-deep hypothermia as low as 1–8°C could be achieved without the application of hypercapnia or pharmacological support. The survival of animals was dependent on the duration of clinical death, which should not exceed 35 min.
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146
Left atrial appendage (LAA) flow profile of its different waves and its correlation with direct left atrial pressure measurement: Can LAA flow profile be a surrogate to estimate left atrial pressure
Prabhat Tewari, Anand Mammen, Shantanu Pandey, Syed Shabbir Ahmad, Kushal Hajela
January-March 2022, 25(1):48-53
DOI
:10.4103/aca.aca_134_21
PMID
:35075020
Background:
Left Atril Appendage(LAA) is one of the most contractile structure of the heart. Elevated Left atrial pressure (LAP) can change the flow profile in and out of LAA. There is little data on the effect of LAP on LAA flow velocities for patients in sinus rhythm, and it's not properly known that by evaluation of LAA flow spectra and its velocities, the LAP can be predicted. We tried to find the relationship between LAA flow velocities and LAP, with the premise that LAA flow velocities can be used as a surrogate for measuring LAP, by obtaining a regression equation in this prospective observational study.
Methods:
In forty patients with normal systolic and diastolic heart function undergoing elective off pump coronary artery bypass (OPCAB) under general anaesthesia, TEE based LAA flow velocities were measured and simultaneous direct measurements of LAP was done by the surgeon. We also studied the relation between the ratio of early mitral inflow velocity (E) and mitral lateral annular early diastolic velocity (E'), that is, (E/E') in all patients.
Results:
We found significant correlation between E/E' and LAP (r = 0.424, p = 0.024) however there was no significant correlation between LAA flow velocities and LAP.
Conclusion:
LAA flow profile can not be used under anaesthesia to evaluate LAP however E/E' shows a strong correlation with directly measured LAP.
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1,354
157
Clinical outcomes of del nido cardioplegia and st thomas blood cardioplegia in neonatal congenital heart surgery
Sameer Mohammed, Sabarinath Menon, Shrinivas V Gadhinglajkar, Sudip D Baruah, Soumya V Ramanan, K Arun Gopalakrishnan, PR Suneel, Baiju S Dharan
January-March 2022, 25(1):54-60
DOI
:10.4103/aca.aca_220_20
PMID
:35075021
Objectives:
Cardioplegia is essential for adequate myocardial protection. There continues to remain ambiguity regarding the ideal cardioplegia for adequate myocardial protection in congenital heart surgery. This study compares clinical outcomes using St Thomas II solution and Del Nido cardioplegia in neonates undergoing cardiac surgery.
Methods:
All neonates (<30 days) from 2011 to 2017 who underwent surgery requiring cardioplegic arrest were analyzed retrospectively. We divided the cohort into two groups depending on cardioplegia received, as group A (Blood cardioplegia with St Thomas II solution,
n
= 56) and group B (Del Nido cardioplegia,
n
= 48). Various demographic, intraoperative, early postoperative, and discharge variables were analyzed.
Results:
Two groups were similar in age, gender, pre-operative diagnosis, and risk category. Cardiopulmonary bypass (CPB) time (
P
= 0.002), aortic cross-clamp (ACC) time (
P
= 0.018), and the number of doses of cardioplegia (
P
< 0.001) were significantly lower with Del Nido group. Though vasoactive inotropic score (VIS) (
P
= 0.036) was high during the first 24 h in the immediate postoperative period in group A, there was no difference in early mortality among both groups (
P
= 0.749). Both groups did not show significant differences related to various postoperative and discharge variables.
Conclusion:
When compared to St. Thomas solution, the use of Del Nido cardioplegia solution in neonates is associated with a significant decrease in CPB and ACC times and VIS in the first 24 h after surgery. The choice of cardioplegia (St Thomas/Del Nido) in neonates does not affect early mortality and early postoperative clinical outcomes.
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2,100
274
Assessment of stress response attenuation with caudal morphine using a surrogate marker during pediatric cardiac surgery
Madan Mohan Maddali, Fathiya Al Shamsi, Nishant Ram Arora, Ramachandhiran Venkatachlam, Panchatcharam Murthi Sathiya
January-March 2022, 25(1):61-66
DOI
:10.4103/aca.ACA_6_20
PMID
:35075022
Background:
Measurement of biomarkers representing sympathetic tone and the surgical stress response are helpful for objective comparison of anesthetic protocols.
Aims:
The primary aim was to compare changes in chromogranin A levels following pump pediatric cardiac surgery between children who received bolus caudal morphine and those who received a conventional intravenous narcotic-based anesthesia regime. The secondary objectives were to compare hemodynamic responses to skin incision and the magnitude of the rise in blood sugar values between the groups.
Settings and Design:
A prospective observational study at a tertiary cardiac center.
Measurements and Methods:
Sixty pediatric cardiac surgical patients were randomized to Group I [
n
= 30
] to receive intravenous narcotic-based anesthesia and Group II [
n
= 30
] to receive single-shot caudal morphine. Baseline and postoperative chromogranin A levels, the hemodynamic response to skin incision, changes in blood sugar levels, and the total intravenous narcotic dose administered were recorded for each participant.
Statistical Analysis:
Pearson's Chi-squared test was used for comparison of categorized variables, and Mann–Whitney test was used for the analysis of continuous data.
Results:
Changes in chromogranin A levels and blood sugar levels were comparable in both groups. Group II received a lower narcotic dosage (
P
≤ 0.001), and the response to skin incision as reflected by systolic pressure rise was less (
P
= 0.006).
Conclusions:
Surgical stress response attenuation was similar to caudal morphine as compared with intravenous narcotic-based anesthesia techniques as reflected by a similar increase in chromogranin A levels.
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206
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© Annals of Cardiac Anaesthesia | Published by Wolters Kluwer -
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Online since 5
th
January, 2008