Abstract：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 regions were specified where the short coupling interval PVBs was prone to occur. Results PVBs originating at the apex of left and right ventricle had the shortest coupling intervals, whatever among singlesourced or multifocal PVBs. There was no statistically significant difference in the shortest coupling interval between left and right ventricular apex originated PVBs(P＞0.05), however, if compared with those of PVBs originating from other sites, the differences were statistically significant(P＜0.05). Conclusion It is possibly related to the structure and function of heart apex that the shortest coupling interval is found in PVBs originating at the apex of left and right ventricle. Meanwhile, it requires further study on large sample to decide whether PVBs originating at the above sites can induce some kinds of malignant ventricular arrhythmias.
郑文凯, 刘林勇, 康虹, 许智永. 应用Lorenz散点图确定短联律间期室早的易发部位[J]. 实用心电学杂志, 2015, 24(1): 48-53.
Zheng-Wen-Kai, LIU Lin-Yong, KANG Hong, XU Zhi-Yong. Application of Lorenz scatterplot in identifying the originating site of short coupling interval ventricular premature beats. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2015, 24(1): 48-53.
2015, Vol. 24 
