Identification of the dominant loop of a dual-loop macro-reentry left atrial flutter without prior intervention using high-density mapping technology:A case report  

作　　者：Shan-Dong Yu Yan-Peng Chu 

机构地区：[1]Department of Cardiology,Capital Medical University affiliated Beijing Friendship Hospital,Beijing 100010,China [2]Department of Cardiology,Dazhou Central Hospital,Dazhou 635000,Sichuan Province,China

出　　处：《World Journal of Clinical Cases》2023年第26期6165-6169,共5页世界临床病例杂志

基　　金：the National Science Foundation of China,No.81800292.

摘　　要：BACKGROUND Left atrial flutter without prior cardiac interventions is uncommon,especially dual-loop macro-reentry atrial flutter.The critical step to ablate dual-loop macroreentry atrial flutter is to identify the dominant loop and key isthmus.Although entrainment mapping could help identify the dominant loop and key isthmus,it may alter or terminate tachycardia.High-density mapping allows the generation of electroanatomic maps without altering or terminating tachycardia.CASE SUMMARY Here,we report a case of symptomatic left atrial flutter without prior intervention.In this case,high-density mapping revealed a dual-loop macro-reentry around the mitral annulus and central scar of the anterior wall.The propagation result showed that the dominant loop was around the mitral annulus,and the key isthmus was between the central scar and mitral annulus.The atrial flutter terminated successfully after ablation was performed.CONCLUSION In this case,we demonstrate that high-density mapping technology may help identify the dominant loop of dual-loop atrial flutter without entrainment,which makes ablation easier.

关 键 词：Dual-loop atrial flutter Macro-reentry High-density mapping Dominant loop Case report 

分 类 号：R541.75[医药卫生—心血管疾病]