Abstract
A patient is described in whom the occurrence of frequent ventricular extrasystoles of right ventricular origin and intermittent right bundle-branch block caused by interpolation of these extrasystoles heralded the slow development of permanent right bundle-branch block over a period of observation of 13 years. Such a clinical course suggested gradual progression of an organic lesion in the intraventricular conducting system. The differential diagnosis of intermittent bundle-branch block and aberrant intraventricular conduction, and possible mechanisms of ectopic impulse formation in the presence of bundle-branch block are discussed.
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- BAUER G. E. TRANSIENT BUNDLE-BRANCH BLOCK. Circulation. 1964 May;29:730–738. doi: 10.1161/01.cir.29.5.730. [DOI] [PubMed] [Google Scholar]
- Castellanos A., Sung R. J., Mendoza I. J., Mallon S. M., Myerburg R. J. Pseudo bundle branch block produced by premature impulses arising in the bundle branches. Am J Cardiol. 1977 Oct;40(4):641–646. doi: 10.1016/0002-9149(77)90084-4. [DOI] [PubMed] [Google Scholar]
- Rosenbaum M. B. Classification of ventricular extrasystoles according to form. J Electrocardiol. 1969 Jul;2(3):289–297. doi: 10.1016/s0022-0736(69)80091-9. [DOI] [PubMed] [Google Scholar]
- Rosenbaum M. B., Elizari M. V., Lázzari J. O., Halpern M. S., Nau G. J., Levi R. J. The mechanism of intermittent bundle branch block: relationship to prolonged recovery, hypopolarization and spontaneous diastolic depolarization. Chest. 1973 May;63(5):666–677. doi: 10.1378/chest.63.5.666. [DOI] [PubMed] [Google Scholar]
- SHEARN M. A., RYTAND D. A. Intermittent bundle-branch block; observations with special reference to the critical heart rate. AMA Arch Intern Med. 1953 Apr;91(4):448–463. doi: 10.1001/archinte.1953.00240160034004. [DOI] [PubMed] [Google Scholar]
- Watanabe Y., Nishimura M. Terminology and electrophysiologic concepts in cardiac arrhythmias. V. Phase 3 block and phase 4 block. Part 1. Pacing Clin Electrophysiol. 1979 May;2(3):335–344. doi: 10.1111/j.1540-8159.1979.tb03654.x. [DOI] [PubMed] [Google Scholar]
- Watanabe Y., Pamintuan J. C., Dreifus L. S. Role of intraventricular conduction disturbances in ventricular premature systoles. Am J Cardiol. 1973 Aug;32(2):188–195. doi: 10.1016/s0002-9149(73)80119-5. [DOI] [PubMed] [Google Scholar]
- Watanabe Y., Toda H. The U wave and aberrant intraventricular conduction. Further evidence for the Purkinje repolarization theory on genesis of the U wave. Am J Cardiol. 1978 Jan;41(1):23–31. doi: 10.1016/0002-9149(78)90127-3. [DOI] [PubMed] [Google Scholar]