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CASE REPORT
Year : 2021  |  Volume : 6  |  Issue : 2  |  Page : 101-103

A case report of tachycardia-dependent right bundle branch block during cardiac resynchronization therapy: A factor for nonresponse


1 Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
2 Department of Cardiology, Northern Jiangsu People's Hospital, Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province, China

Correspondence Address:
Prof. Lei Sun
Department of Cardiology, Northern Jiangsu People's Hospital, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province
China
Xiang Gu
Department of Cardiology, Northern Jiangsu People's Hospital, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province
China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijhr.ijhr_13_21

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Cardiac resynchronization therapy (CRT) has been shown to improve symptoms and mortality in a suitably selected population with systolic heart failure and prolonged QRS duration. Various factors have been reported to be associated with poor response to CRT. A 67-year-old man with CRT implantation experienced response, nonresponse, and response in turn. The new-onset right tachycardia-dependent bundle branch block was considered to be an exclusive cause. More attention should be paid to the possible changes of paced-QRS morphology, resulting from tachycardia-dependent aberrancy during CRT, ensuring a high percentage of effective biventricular pacing.


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