Characteristics associated with ventricular tachyarrhythmias and their prognostic impact in heart failure with mildly reduced ejection fraction

Background: The occurrence of ventricular tachyarrhythmias represents an established risk factor of mortality in heart failure (HF). However, data concerning their prognostic impact in heart failure with mildly reduced ejection fraction (HFmrEF) is limited. Therefore, the present study aims to inves...

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Main Authors: Schmitt, Alexander (Author) , Behnes, Michael (Author) , Rusnak, Jonas (Author) , Akın, Muharrem (Author) , Reinhardt, Marielen (Author) , Abel, Noah (Author) , Forner, Jan (Author) , Müller, Julian (Author) , Weidner, Kathrin (Author) , Abumayyaleh, Mohammad S. A. (Author) , Akın, Ibrahim (Author) , Schupp, Tobias (Author)
Format: Article (Journal)
Language:English
Published: 1 May 2024
In: Journal of Clinical Medicine
Year: 2024, Volume: 13, Issue: 9, Pages: 2665-1-2665-23
ISSN:2077-0383
DOI:10.3390/jcm13092665
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3390/jcm13092665
Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/2077-0383/13/9/2665
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Author Notes:Alexander Schmitt, Michael Behnes, Jonas Rusnak, Muharrem Akin, Marielen Reinhardt, Noah Abel, Jan Forner, Julian Müller, Kathrin Weidner, Mohammad Abumayyaleh, Ibrahim Akin and Tobias Schupp

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520 |a Background: The occurrence of ventricular tachyarrhythmias represents an established risk factor of mortality in heart failure (HF). However, data concerning their prognostic impact in heart failure with mildly reduced ejection fraction (HFmrEF) is limited. Therefore, the present study aims to investigate patient characteristics associated with ventricular tachyarrhythmias and their prognostic impact in patients with HFmrEF. Methods: Consecutive patients hospitalized with HFmrEF (i.e., left ventricular ejection fraction 41-49% and signs and/or symptoms of HF) were retrospectively included at one institution from 2016 to 2022. The prognosis of patients with HFmrEF and different types of ventricular tachyarrhythmias (i.e., non-sustained ventricular tachycardia (nsVT), sustained VT (sVT), and ventricular fibrillation (VF) was investigated for the primary endpoint of long-term all-cause mortality at 30 months. Secondary endpoints included in-hospital all-cause mortality and long-term HF-related rehospitalization at 30 months. Results: From a total of 2184 patients with HFmrEF, 4.4% experienced ventricular tachyarrhythmias (i.e., 2.0% nsVT, 0.7% sVT, and 1.6% VF). The occurrence of nsVT was associated with higher New York Heart Association (NYHA) functional class, whereas the incidence of sVT/VF was associated with acute myocardial infarction and ischemic heart disease. However, nsVT (25.0%; HR = 0.760; 95% CI 0.419-1.380; p = 0.367) and sVT/VF (28.8%; HR = 0.928; 95% CI 0.556-1.549; p = 0.776) were not associated with a higher risk of long-term all-cause mortality compared to patients with HFmrEF without ventricular tachyarrhythmias (31.5%). In-hospital cardiovascular mortality was more frequently observed in patients with HFmrEF and sVT/VF compared to those with HFmrEF but without sustained ventricular tachyarrhythmias (7.7% vs. 1.5%; p = 0.004). Finally, the risk of rehospitalization for worsening HF was not affected by the presence of ventricular tachyarrhythmias. Conclusions: The occurrence of ventricular tachyarrhythmias in patients hospitalized with HFmrEF was low and not associated with long-term prognosis. 
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