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KMID : 0368120190490070602
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Korean Circulation Journal
2019 Volume.49 No. 7 p.602 ~ p.611
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Prognostic Implication of Ventricular Conduction Disturbance Pattern in Hospitalized Patients with Acute Heart Failure Syndrome
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Lee Ji-Hyun
Park Jin-Joo
Cho Young-Jin
Oh Il-Young
Yoo Byung-Su
Kim Jae-Joong
Kim Kye-Hun
Kang Seok-Min
Baek Sang-Hong
Jeon Eun-Seok
Cho Myeong-Chan
Chae Shung-Chull
Oh Byung-Hee
Choi Dong-Ju
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Abstract
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Background and Objectives: Conflicting data exist regarding the prognostic implication of ventricular conduction disturbance pattern in patients with heart failure (HF). This study investigated the prognostic impact of ventricular conduction pattern in hospitalized patients with acute HF.
Methods: Data from the Korean Acute Heart Failure registry were used. Patients were categorized into four groups: narrow QRS (<120 ms), right bundle branch block (RBBB), left bundle branch block (LBBB), and nonspecific intraventricular conduction delay (NICD). The NICD was defined as prolonged QRS (≥120 ms) without typical features of LBBB or RBBB. The primary endpoint was the composite of all-cause mortality or rehospitalization for HF aggravation within 1 year after discharge.
Results: This study included 5,157 patients. The primary endpoint occurred in 39.7% of study population. The LBBB group showed the highest incidence of primary endpoint followed by NICD, RBBB, and narrow QRS groups (52.5% vs. 49.7% vs. 44.4% vs. 37.5%, p<0.001). In a multivariable Cox-proportional hazards regression analysis, LBBB and NICD were associated with 39% and 28% increased risk for primary endpoint (LBBB hazard ratio [HR], 1.392; 95% confidence interval [CI], 1.152?1.681; NICD HR, 1.278; 95% CI, 1.074?1.520) compared with narrow QRS group. The HR of RBBB for the primary endpoint was 1.103 (95% CI, 0.915?1.329).
Conclusions: LBBB and NICD were independently associated with an increased risk of 1-year adverse event in hospitalized patients with HF, whereas the prognostic impacts of RBBB were limited.
Trial Registration: ClinicalTrials.gov Identifier: NCT01389843
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KEYWORD
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Cardiac conduction system disease, Bundle branch block, Prognosis, Heart failure
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