Click on image to view larger version.

Figure 1 Effects of paced cycle length on left ventricular (LV) monophasic action potential duration (MAPD) (A) and LV short-term variability (B). Line in A shows best monoexponential fit to the data points. Ten anesthetized dogs were paced at varying cycle length from the endocardium of the right ventricle. *p < 0.05; Student paired t test versus 700 ms cycle length.