ECG Manifestations in Dilated Cardiomyopathy: A Narrative Review

Abstract

Background: Dilated cardiomyopathy (DCM) is a prevalent cardiovascular disorder characterized by left ventricular (LV) or biventricular dilatation and impaired systolic function. Electrocardiography (ECG) serves as a valuable tool for diagnosing and monitoring DCM, capturing various cardiac electrical abnormalities.

Objective: This narrative review aims to explore the diverse ECG manifestations observed in DCM, shedding light on their clinical significance and diagnostic implications.

Methods: A comprehensive literature search was conducted to identify studies elucidating ECG findings in DCM. Relevant articles were selected and analyzed to summarize the common abnormalities observed on ECG in DCM patients.

Results: DCM often presents with nonspecific ECG findings, including LV hypertrophy, prolonged QRS duration, ST-T wave irregularities, and occasionally reduced QRS voltage. ECG evidence may indicate LV or biventricular enlargement alongside impaired systolic function, typically manifesting as a widened QRS complex indicative of delayed ventricular depolarization.

Conclusion: Recognizing the diverse ECG manifestations associated with DCM is crucial for clinicians in diagnosing and managing this condition effectively. Understanding the significance of these ECG abnormalities can aid in risk stratification, guiding therapeutic interventions, and improving patient outcomes.