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Analysis of left ventricular pressure during isovolumic relaxation in coronary artery disease
When a decrease in left ventricular isovolumic pressure is considered as an exponential, the rate of relaxation can be defined by a time constant (T). Previously, T has been calculated from the slope of In (pressure) against time, but this method is valid only when the asymptote of the exponential is zero. In this study two estimates of T were made: Tin from the slope of In (pressure) against time, and TEXP by a method of exponential analysis that also estimated the asymptote. These techniquesdoi:10.1161/01.cir.65.4.690 pmid:7060246 fatcat:4fr3g22sdrcydpxz6twnsiungi