Effect of isolated coronary artery ectasia on atrial conduction

Feng Siting; Hao Peng; Wang Mei; Wang Xiao; Wang Chunmei; Nie Shaoping

doi:10.3760/cma.j.issn.1673-4777.2016.05.001

Abstract：Objective To explore the effect of isolated coronary artery ectasia (CAE) on atrial conduction.Methods Totally 38 patients with CAE confirmed by coronary angiography (CAE group) and 49 patients with atypical chest pain but without epicardial coronary artery stenosis confirmed by coronary angiography (control group) from January to April in 2015 were enrolled.The indexes of echocardiography and electrocardiograph were compared between groups;the distribution characteristics of coronary artery in angiography in patients with CAE were analyzed.Results The index of echocardiography were not significantly different between groups (P ＞ 0.05).The P-wave maximal duration (Pmax) and P-wave dispersion (Pd) in CAE group were significantly higher than those in control group [(120±12) msvs (104±11) ms,(47±13) ms vs (27±10) ms] (P＜0.01).In CAE group,(4.6± 2.3) segments of coronary artery were involved,which were distributed at left main coronary artery (12 cases),left anterior descending artery (16 cases),left circumflex (13 cases) and right coronary artery (26 cases);the left main coronary artery was involved in 1 case,the left main and single-vessel were involved in 4 cases,the left main and double-vessel were involved in 5 cases,the left main and three-vessel were involved in 2 cases,single,double and three-vessel were involved in 18,7 and 1 case,18 cases in single coronary artery,7 cases in two coronary arteries,1 case in three vessel coronary arteries.CAE involving number and distribution of coronary artery had no correlations with Pmax and Pd,CAE involving number of coronary artery segment was positively correlated with Pmax (P ＜ 0.001) and Pd (P =0.004) was positively correlated.Conclusion Prolonged Pmax and Pd are found in patients with isolated CAE,the Pmax and Pd are positively correlated with ectatic involving segment number.