1. Right bundle branch block and risk of cardiovascular mortality: the Ibaraki Prefectural Health Study.
- Author
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Nakazawa, Naomi, Ishizu, Tomoko, Sairenchi, Toshimi, Yamagishi, Kazumasa, Murakoshi, Nobuyuki, Nakagawa, Daishi, Nakatsukasa, Tomofumi, Kawamatsu, Naoto, Sato, Kimi, Yamamoto, Masayoshi, Machino-Otsuka, Tomoko, Xu, DongZhu, Irie, Fujiko, Tomizawa, Takuji, Nogami, Akihiko, Aonuma, Kazutaka, Iso, Hiroyasu, Ieda, Masaki, Kawakami, Yasushi, and Ota, Hitoshi
- Subjects
BUNDLE-branch block ,CARDIOVASCULAR diseases risk factors ,PROPORTIONAL hazards models ,OLDER men ,OLDER women - Abstract
Historically, a right bundle branch block has been considered a benign finding in asymptomatic individuals. However, this conclusion is based on a few old studies with small sample sizes. We examined the association between a complete right bundle branch block (CRBBB) and subsequent cardiovascular mortality in the general population in Japan. In this large community-based cohort study, data of 90,022 individuals (mean age, 58.5 ± 10.2 years; 66.2% women) who participated in annual community-based health check-ups were assessed. Subjects were followed up from 1993 to the end of 2016. Cox proportional hazards' models and log-rank tests were used for the data analysis. CRBBB was documented in 1,344 participants (1.5%). Among all included participants, CRBBB was associated with an increased risk of cardiovascular mortality after adjustment for all potential confounders (hazard ratio [HR] 1.21; 95% confidence interval [CI] 1.06–1.38). The increased risk of cardiovascular mortality was particularly evident in women aged < 65 years (HR 2.00; 95% CI 1.34–2.98) and men aged ≥ 65 years (HR 1.28; 95% CI 1.06–1.55). CRBBB is associated with an increased risk of cardiovascular mortality in women aged < 65 years and men aged ≥ 65 years. Clinicians should be aware of the presence of CRBBB in young women and elderly men, even if they exhibit no symptoms. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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