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Figure 2: Transaortic CWD flow profile is recorded during three separate events. A: VTIs of same magnitude are seen during a regular cardiac beating. The white arrow and white arrow head are indicating beginning of systolic ejection and end-systole respectively. B: The VTIs are becoming progressively smaller in size during a positive pressure breath. C: PALT indicated by alternating in size VTIs.

Figure 2: Transaortic CWD flow profile is recorded during three separate events. 
A: VTIs of same magnitude are seen during a regular cardiac beating. The white arrow and white arrow head are indicating beginning of systolic ejection and end-systole respectively. B: The VTIs are becoming progressively smaller in size during a positive pressure breath. C: PALT indicated by alternating in size VTIs.