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Figure 1 Representative tissue velocity and myocardial acceleration of the septal mitral valve annulus and synchronized waveforms of LV pressure (LVP) and left atrial pressure (LAP). Early diastolic annular velocity (Ea) and late diastolic annular velocity (Aa) were noted in velocity curve 1-A. Definite positive peaks for myocardial acceleration were noted during isovolumic relaxation time (IVRT) (•), and a negative peak for acceleration at the beginning of the left ventricular filling period (*) was also noted corresponding to the Ea wave in ACC curve 1-B. The LVP and LAP were displayed together (1-C), and the difference between LAP and LVP was shown in 1-D. The derivative of LV pressure (dLVp/dt) was also displayed in 1-E. The derivativeof the difference between LAP and LVP was calculated and displayed in 1-F. ECG = electrocardiogram.
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