Figure 12
From: WEB downloadable software for training in cardiovascular hemodynamics in the (3-D) stress echo lab
Training example with a "DCM subject" data set. Clicking on the "view graphics" button opens the graph results sheet. For each calculated variable rest-peak changes are graphically displayed with heart rate values on the x-axis and variable value on the y-axis. LV elastance index is markedly lower at peak exercise. At peak stress ventricular elastance index is less than one-half of the arterial elastance index, which results in decreased ventricular-arterial coupling and work efficiency. DCM patients display a vasoconstrictive response in peripheral circulation, with a modest and inconsistent decrease of SVR and a more marked drop of arterial compliance at peak stress.