动态心电图判断室性早搏起源部位的分析

目的探讨12导联同步动态心电图（AECG）对室性早搏起源部位的定位价值。方法选择我院经12导联同步AECG检查明确诊断有频发单源室性早搏的患者90例，分析12导联AECG及该患者常规12导联心电图上室性早搏QRS波群形态的差异，对其起源部位分别进行初步定位，并与心内电生理检查结果进行对照分析。结果室性早搏起源于右室共65例，其中起源于右室流出道55例（占61．11％）、右室心底部5例（占5．56％）、右束支2例（占2．22％）、其他3例（占3．33％），起源于左室流出道20例（占22．22％）、左室心底部3例（占3．33％）、左束支2例（占2．22％）。结论根据12导联同步AECG的室性早搏QRS波群的形态可以初步判断其起源部位，指导室性早搏射频消融治疗方式的选择。

Identification of the site of origin of ventricular premature beats through ambulatory electrocardiography

Objective To investigate the value of ambulatory electrocardiography （AECG） in identifica- tion of the site of origin of ventricular premature beats （VPBs）. Methods 90 patients had been diagnosed with frequent monomorphic ventricular extrasystoles through 12-lead synchronous AECG and ECG. The location of origin of ventricular premature beats had been studied and comparatively analyzed with the results of intracardiac electro- physiology. Results There were 65 cases of VPBs identified from the right ventricle among which 55 cases from the right ventricular outflow tract （61.11%）, 5 cases from the bottom of right ventricle （5.56%）, 2 cases from the right bundle branch （2.22%） and 3 cases from others （3.33%）. Another 25 cases were from left ventricle among which 20 cases from left ventricular outflow tract （22.22%）, 3 cases from the bottom of left ventricle（3.33%） and 2 cases from the left bundle branch （2.22%）. Conclusion The site of origin of VPBs can be preliminarily as- sessed according to 12-lead synchronous AECG which can help us to select proper treatment with radiofrequency ablation.