Objective To explore the correlation between short coupling interval ventricular premature beats( PVBs) and ventricular anatomical position. Methods Lorenz plot was utilized in finding the points representing the shortest coupling interval among the PVBs point set,and the originating site of PVBs was identified by reversal technique. The shortest coupling intervals of 401 cases with single-sourced PVBs and 93 cases with multifocal PVBs were measured and statistically analyzed.Based on the analysis,the regio...