Cardiac Resynchronization Therapy Relieves Intractable Angina Due to Exercise‐Induced Left Bundle Branch Block Without Left Ventricular Systolic Dysfunction: A Detailed Case Study |
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Authors: | DANIEL CZURIGA M.D. Ph.D. PITT O. LIM M.D. F.R.C.P. |
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Affiliation: | 1. Cardiology Clinical Academic Group, St. George's University Hospitals NHS Foundation Trust, London, UK;2. Department of Cardiology, University of Debrecen Medical Center, Debrecen, Hungary |
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Abstract: | Exercise‐induced left bundle branch block is rare and can be demonstrated with exercise testing. When the heart rate reaches a certain threshold, the QRS widens into left bundle branch block. This paper describes a patient with exercise‐induced left bundle branch block related angina and dyspnea, who responded to cardiac resynchronization therapy. We documented the potential benefits of cardiac resynchronization therapy with a left ventricular rapid pacing study prior to its implantation. Although exercise‐induced left bundle branch block is not a current indication for cardiac resynchronization therapy in patients such as ours, it could be considered when conventional drug therapy fails. |
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Keywords: | angina cardiac resynchronization therapy exercise‐induced left bundle branch block |
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