Safe right bundle branch block pattern during permanent right ventricular pacing.
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.
Yang
Yung-Nien
YN
Division of Cardiology, Department of Internal Medicine, Armed Forces Sung-Shan Hospital, Taipei, Taiwan, R.O.C.
Yin
Wei-Hsian
WH
Young
Mason Shing
MS
D000368:Aged; D002037:Bundle-Branch Block / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D004452:Echocardiography; D004562:Electrocardiography; D006327:Heart Block / Q000628:therapy; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial; D011859:Radiography