Study On Characteristics Of ?°AVB In STEMI And The Relationship Between ?°AVB And The Blood Supply Of The Atrioventricular Node

Objective:To analyze the proportion of ?°atrioventricular block(?°AVB)in patients with ST-segment elevation acute myocardial infarction(STEMI)and the relationship between ?°AVB and the blood supply of atrioventricular node.Methods:To explore the relationship between criminal blood vessels and ?°AVB and the source of blood supply of atrioventricular node,581 STEMI patients were enrolled in this study,and were divided into two groups:study group(with ?°AVB)and control group(without ?°AVB),who underwent emergency coronary angiography and emergency percutaneous coronary interention(PCI)in the Second Central Hospital of Baoding City from 01.2012 to 12.2017.Results:27(4.6%)?°AVB patients were found in the study and all occurred in the acute occlusion of single coronary artery.Of which,24 were acute occlusion of right coronary artery(RCA),2 were acute occlusion of left anterior descending artery(LAD),and 1 was acute occlusion of left circumflex artery(LCX).There was no ?°AVB when one or both vessels were chronic total occlusion disease(CTO)and the other was acute occlusion.At the time of acute RCA occlusion,whether or not the atrioventricular nodal artery(AVNA)was involved,it was not associated with the occurrence of the ?°AVB.Multifactor logistic regression analysis indicated the combined chronic total occlusion disease(CTO)was an independent predictor for patients with ST-segment elevation acute inferior wall myocardial infarction without ?°AVB(OR=0.017,P=0.000).Conclusions:In this study,all the ST-segment elevation acute myocardial infarction patients with ?° atrioventricular block were found in those with total occlusion of single artery,most of which occurred in acute occlusion of RCA,but not related to the atrioventricular nodal artery(AVNA)from RCA.