Safe right bundle branch block pattern during permanent right ventricular pacing |
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Authors: | Yang Yung-Nien Yin Wei-Hsian Young Mason Shing |
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Institution: | Division of Cardiology, Department of Internal Medicine, Armed Forces Sung-Shan Hospital, Taipei, Taiwan, R.O.C. |
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Abstract: | It is known that an electrocardiogram (ECG) after transvenous right ventricular (RV) pacing should yield left bundle branch block (LBBB) QRS patterns. When right bundle branch block (RBBB) pacing morphology appears in a patient with a permanent or temporary transvenous RV pacemaker, myocardial perforation or malposition of the pacing lead must be ruled out, even though the patient may be asymptomatic. We report a case of a 77-year-old man who underwent permanent transvenous VDD pacemaker implantation for symptomatic heart block. The postoperative ECG revealed a RBBB pacing configuration, but his chest X-ray and echocardiographic studies confirmed uncomplicated RV pacing. We review and discuss the literature concerning the differential diagnosis of such a safe RBBB ECG pattern. |
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