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Etiology and Left Ventricular Functions in Left Bundle Branch Block- A Prospective Observational Study

Rajeev Bhardwaj1

  • 1Professor, Department of Cardiology, Indira Gandhi Medical College, Shimla, Himachal Pradesh.

The Journal of the Association of Physicians of India
|October 21, 2016
PubMed

Insights

This study investigated the causes and left ventricular function in patients with Left Bundle Branch Block (LBBB). Hypertension and dilated cardiomyopathy were common, with over half experiencing left ventricular systolic dysfunction.

Area of Science:

  • Cardiology
  • Internal Medicine
  • Diagnostic Electrocardiography

Background:

  • Left Bundle Branch Block (LBBB) is a frequent electrocardiogram (ECG) finding.
  • Common etiologies include coronary artery disease (CAD), hypertension, and dilated cardiomyopathy (DCM).
  • Understanding the underlying causes and impact on left ventricular function is crucial for patient management.

Purpose of the Study:

  • To determine the etiology of LBBB in patients presenting to a territory care hospital.
  • To assess left ventricular function in patients diagnosed with LBBB.
  • To correlate clinical presentation with echocardiographic findings in LBBB patients.

Main Methods:

  • Consecutive indoor and outdoor patients with ECG-suggestive LBBB were enrolled.
  • Detailed patient history and physical examinations were conducted.
  • Echocardiography was performed on all participants to evaluate left ventricular structure and function.

Main Results:

  • A total of 132 patients with LBBB were studied (mean age 61.65±13.02 years).
  • Dyspnea (30.3%) and chest pain (24.24%) were the most common presenting symptoms.
  • Hypertension was prevalent (47.7%), and Left Ventricular Hypertrophy (LVH) was the most common echocardiographic finding (31.8%).
  • Over 50% of patients (56.8%) exhibited left ventricular systolic dysfunction.
  • Dilated cardiomyopathy (25%) and myocardial infarction (23.48%) were significant underlying causes.

Conclusions:

  • Dyspnea and chest pain are common symptoms in LBBB patients.
  • Hypertension is a major comorbidity, and LVH is a frequent echocardiographic abnormality.
  • Left ventricular systolic dysfunction is highly prevalent in patients with LBBB.
Abstract

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