Prognostic implication of ventricular conduction disturbance pattern in hospitalized patients with acute heart failure syndrome

Ji Hyun Lee, Jin Joo Park, Youngjin Cho, Il Young Oh, Byung Su Yoo, Jae Joong Kim, Kye Hun Kim, Seok Min Kang, Sang Hong Baek, Eun Seok Jeon, Myeong Chan Cho, Shung Chull Chae, Byung Hee Oh, Dong Ju Choi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)602-611
Number of pages10
JournalKorean Circulation Journal
Issue number7
Publication statusPublished - 2019

Bibliographical note

Publisher Copyright:
© 2019. The Korean Society of Cardiology.

All Science Journal Classification (ASJC) codes

  • Internal Medicine
  • Cardiology and Cardiovascular Medicine


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