Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Left bundle branch block history and symptoms
Introduction
LBBB may be asymptomatic, particularly when it occurs in the absence of significant structural heart disease. However, because LBBB is frequently associated with underlying cardiovascular disorders, affected individuals may present with symptoms related to heart failure, ischemic heart disease, or cardiomyopathy, including dyspnea, exercise intolerance, fatigue, chest pain, palpitations, or syncope. [1]