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Revista argentina de cardiología
versión On-line ISSN 1850-3748
Resumen
JURADO-ROMAN, Alfonso et al. Rate-Dependent Bundle Branch Block: Not Only Phase 3 Exists. Rev. argent. cardiol. [online]. 2013, vol.81, n.3, pp.265-267. ISSN 1850-3748.
Rate-dependent bundle branch blocks are often related with increased heart rate (tachycardia-dependent or phase 3 bundle branch block). Less often, they are caused by heart rate reduction (bradycardia-dependent or phase 4 bundle branch block). Phase 3 block is the most common type of paroxysmal intraventricular conduction disturbances documented in several publications. However, few articles describe phase 4 bundle branch block, and both mechanisms rarely coexist in the same patient. We report the case of a patient admitted with acute myocardial infarction, presenting with both tachycardia- and bradycardia-dependent paroxysmal intraventricular conduction disturbances.
Palabras clave : Bundle-branch Block; Bradycardia; Tachycardia; Myocardial Infarction.