Key result
Exercise stress test provokes alternating tachycardia-dependent bilateral bundle branch block in ischemic heart disease.
Why the study?
Frequency-dependent bundle branch blocks can provide useful prognostic information in ischemic heart disease with systolic dysfunction, but their characterization is limited.
Case Report (n=1)
May signal high risk for advanced AV block warranting pacemaker consideration; hypothesis-generating in ischemic heart disease with systolic dysfunction.
A proper characterization of frequency-dependent bundle branch blocks can provide useful prognostic information in some clinical situations. Often, this physiological event may be due to an extensive damage of infrahisian system, which poses a high risk of developing advanced atrioventricular block requiring pacemaker implantation. We describe the case of a 62 year-old man with chronic ischemic heart disease who exhibited alternating tachycardia-dependent bundle branch block during stress test. We discuss the main prognostic implications of this unusual event in the context of systolic dysfunction.
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Ferrando‐Castagnetto et al. (2015) conducted a case report in Ischemic heart disease with systolic dysfunction (n=1). Exercise stress test was evaluated on Development of tachycardia-dependent bundle branch block. An exercise stress test in a 62-year-old man with ischemic heart disease and systolic dysfunction provoked alternating tachycardia-dependent bilateral bundle branch block.
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