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Complete Right Bundle Branch Block as a Predictor of Cardiovascular Events in Type 2 Diabetes.
Katsuhiro Ono1,2, Sadahiko Uchimoto1, Masamune Miyazaki1
1Department of Internal Medicine, Fujiidera Municipal Hospital, Fujiidera 583-0012, Japan.
Complete right bundle branch block (CRBBB) is a common ECG finding. In type 2 diabetes mellitus (T2DM) patients, CRBBB independently predicts cardiovascular events, including death and heart failure.
Area of Science:
- Cardiology
- Diabetology
- Electrocardiography
Background:
- Complete right bundle branch block (CRBBB) is often considered clinically insignificant.
- Its prognostic value in type 2 diabetes mellitus (T2DM) patients is not well-established.
Purpose of the Study:
- To investigate the association between CRBBB and cardiovascular events in T2DM patients.
- To determine if CRBBB is an independent predictor of adverse cardiovascular outcomes in this population.
Main Methods:
- A single-center cohort study with a 6-year follow-up.
- Analysis of 370 T2DM patients, including those with pre-existing heart disease.
- The Fine-Gray model with inverse probability of treatment weighting was employed.
Main Results:
- CRBBB was present in 9.2% of the T2DM patients.
- Patients with CRBBB had a significantly higher risk of composite cardiovascular events (HR, 2.55; 95% CI, 1.04-6.26; p=0.041).
- This association remained significant after adjusting for confounders.
Conclusions:
- CRBBB is an independent predictor of cardiovascular events in patients with T2DM.
- Further research with larger cohorts is recommended to validate these findings.
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