Study of acquired QT interval prolongation after cardiovascular surgery
Objective To explore the relationship between cardiac surgery and QT interval changes.Methods A retrospective analysis was conducted on the differences and correlations in age,operation time,preoperative QTc,postoperative QTc,and QTc difference between 57 cases of extracardiac surgery and 9 cases of major noncardiac surgery.Results The postoperative QTc of the intraoperative cardiopulmonary bypass group was longer than that of the non-cardiopulmonary bypass group.The difference in QTc between non-cardiac surgery and extracardiac minimally invasive surgery groups was smaller than that in other cardiac surgery groups.When the number of bypasses increases,the postoperative QTc and QTc differences also become larger.There was a significant correlation between operation time and postoperative QTc in the extracardiac surgery group.Conclusions Cardiac surgery can cause QT to be longer than preoperative,especially when the longer operation time,extracorporeal circulation,and more bypasses,leading to the occurrence of acquired LQTS.
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