Evaluation of sinus node function by transesophageal atrial pacing and dynamic electrocardiogram and their correlativity

Objective To evaluate the sinus node function by transesophageal atrial pacing and dynamic electrocardiogram,and investigate the correlativity of these two methods.Methods 38 patients suspected of sick sinus syndrome were selected for this study.Transesophageal atrial pacing,dynamic electrocardiogram,atropine test were carried out for each patien.These patients were then divided into syncope and non-syncope groups,or atropine test negative and positive groups.Results In patients of both syncope group and atropine test positive group,SNRT,CSNRT,SACT and the longest R-R duration significantly increased compared with that of their corresponding group,and the fastest heart rate and the slowest heart rate significantly decreased.CSNRT and SACT were correlated to the longest R-R duration,the fastest heart rate and the slowest heart rate,respectively.Conclusion Transesophageal atrial pacing and dynamic electrocardiogram are useful methods to evaluate the sinus node function,there are correlativity in the results of two methods.