Volume 41, Issue 3 e70084
ORIGINAL ARTICLE
Open Access

Survival benefit of primary prevention implantable cardioverter-defibrillator/cardiac resynchronization therapy with a defibrillator: Analysis of the Japan cardiac device treatment registry and Japanese cardiac registry of heart failure in cardiology

Hisashi Yokoshiki MD, PhD

Corresponding Author

Hisashi Yokoshiki MD, PhD

Department of Cardiovascular Medicine, Sapporo City General Hospital, Sapporo, Japan

Correspondence

Hisashi Yokoshiki, Department of Cardiovascular Medicine, Sapporo City General Hospital, Kita-11, Nishi-13, Chuo-ku, Sapporo 060-8604, Japan.

Email: [email protected]

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Masaya Watanabe MD, PhD

Masaya Watanabe MD, PhD

Department of Cardiovascular Medicine, Hokko Memorial Hospital, Sapporo, Japan

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Sanae Hamaguchi MD, PhD

Sanae Hamaguchi MD, PhD

Department of Cardiovascular Medicine, Sapporo City General Hospital, Sapporo, Japan

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Hiroyuki Tsutsui MD, PhD

Hiroyuki Tsutsui MD, PhD

School of Medicine and Graduate School, International University of Health and Welfare, Otawara, Japan

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Akihiko Shimizu MD, PhD

Akihiko Shimizu MD, PhD

UBE Kohsan Central Hospital, Ube, Japan

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Takeshi Mitsuhashi MD, PhD

Takeshi Mitsuhashi MD, PhD

Department of Cardiovascular Medicine, Hoshi General Hospital, Koriyama, Japan

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Kohei Ishibashi MD, PhD

Kohei Ishibashi MD, PhD

Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan

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Tomoyuki Kabutoya MD, PhD

Tomoyuki Kabutoya MD, PhD

Division of Cardiovascular Medicine, Department of Medicine, Jichi Medical University School of Medicine, Shimotsuke, Japan

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Yasuhiro Yoshiga MD, PhD

Yasuhiro Yoshiga MD, PhD

Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan

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Yusuke Kondo MD, PhD

Yusuke Kondo MD, PhD

Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan

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Taro Temma MD, PhD

Taro Temma MD, PhD

Department of Cardiovascular Medicine, Hokkaido University Hospital, Sapporo, Japan

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Masahiko Takagi MD, PhD

Masahiko Takagi MD, PhD

Division of Cardiac Arrhythmia, Kansai Medical University Medical Centre, Moriguchi, Japan

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Hiroshi Tada MD, PhD

Hiroshi Tada MD, PhD

Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan

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First published: 12 May 2025

Abstract

Background

Evidence supporting the benefit from primary prevention implantable cardioverter-defibrillator (ICD)/cardiac resynchronization therapy with a defibrillator (CRT-D) for heart failure with reduced ejection fraction (HFrEF) is scarce in real-world settings.

Methods

We analyzed propensity score matched cohorts of patients eligible for Sudden Cardiac Death in Heart Failure Trial (SCD-HeFT) from Japan cardiac device treatment registry (JCDTR) and Japanese Cardiac Registry of Heart Failure in Cardiology (JCARE-CARD). The former served as the defibrillator therapy group and the latter as the conventional therapy group.

Results

During an average follow-up of 24 months, death occurred in 35 of 285 patients (12%) with defibrillator therapy and 65 of 285 patients (23%) with conventional therapy. Adjusted hazard ratios of all-cause death, sudden death, heart failure death, and noncardiac death in defibrillator versus conventional therapy were 0.616 (95% confidence interval [CI]: 0.402–0.943, p = 0.026), 0.274 (95% CI: 0.103–0.731, p = 0.0097), 0.362 (95% CI: 0.172–0.764, p = 0.0077) and 1.45 (95% CI: 0.711–2.949, p = 0.31). After accounting for death without appropriate defibrillator therapy as a competing risk, the cumulative incidence of first appropriate defibrillator therapy in the defibrillator therapy group was nearly identical to that of all-cause death in the conventional therapy group. Subgroup analyses indicated a lack of defibrillator benefit in patients with hypertension (p = 0.01 for interaction).

Conclusions

Primary prevention ICD/CRT-D reduced the risk of all-cause mortality of patients with HFrEF eligible for SCD-HeFT compared to conventional therapy in the real-world cohort.

CONFLICT OF INTEREST STATEMENT

All authors declare no conflict of interest related to this study.

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