Figure 2
Method for PA PWV, AT and ET measurements. (A) The plot shows the flow area of the PA of eight cardiac phases during early systole. The slope of a fitted line to the early systole gives Δflow/Δarea = PWV. (B) The plot shows the time course of the PA blood flow. The left dotted vertical line is the time of peak systolic flow. The right dotted vertical line is the time of the end of ejection. AT is the time interval between the onset of the PA blood flow and the peak flow (short red double arrow). ET is the time interval between the onset and the end of systolic PA blood flow (long red double arrow). PA pulmonary artery, AT acceleration time, ET ejection time.
