Alternation of right bundle branch block with beats showing normal conduction and with a less complete right bundle branch block pattern.

Abstract

We report the case of an 80-year-old man with a preexistent right bundle branch block (RBBB) who underwent dobutamine stress echocardiography. As the sinus cycle length gradually decreased during the stress test, he first developed a 2:1 RBBB pattern alternating with beats showing normal conduction and then an alternating 2:1 less complete and more complete RBBB pattern. An elucidation of the potential mechanism of the latter very rare phenomenon is provided.

• Authors: András Vereckei, József Tenczer, Michael Hickman
• Journal: Pacing and clinical electrophysiology : PACE (Pacing Clin Electrophysiol) Vol. 32 Issue 9 Pg. 1222-6 (Sep 2009) ISSN: 1540-8159 [Electronic] United States
• PMID: 19719502 (Publication Type: Case Reports, Journal Article)

Topics

• Aged, 80 and over
• Bundle-Branch Block (diagnosis)
• Diagnosis, Differential
• Electrocardiography (methods)
• Humans
• Male
• Tachycardia, Ventricular (diagnosis)