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Figure 5 Representative experiment showing left ventricular (LV) pressure and volume during isoprenaline infusion. Note that the pressure in the left ventricle at the apex (LVPapex) declined at a faster rate than LVPmitral and LVPaorta during isovolumic pressure decay (upper panel). However, minimal first derivative of LV pressure (dP/dtmin) of the LVPapex (middle vertical broken line) was delayed, as compared with the dP/dtmin of the LVPaorta and LVPmitral (left vertical broken line). The right vertical broken line indicates the first crossover between all three LV and left atrial pressures.
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