Chagas disease electrocardiogram

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

RBBB and AV block are common findings on ECG among patients with Chagas disease cardiomyopathy.

Electrocardiogram

• Annual 12-lead ECG is recommended for all (treated and untreated) patients with Chagas disease:
• Abnormal 12-lead ECG warrant further cardiac evaluation:

• Echocardiography
• Ambulatory ECG evaluation
• Electrophysiological studies

Common ECG Findings

• RBBB
• AV blocks
• Tachyarrhythmias
• Bradyarrhythmias
• Sinus node dysfunction

Acute form of Chagas Disease

In a patient with diagnosed Chagas disease, cardiac damage is suspected if one or more following ECG findings occurs:

• Right bundle-branch block (RBBB),
• Left anterior fascicular block (LAFB),
• Atrio-Ventricular blocks
• Multifocal PVCs
• Sinus bradycardia
• Abnormal ST segment and / or T wave changes
• Abnormal T and / or Q waves
• Myocarditis is infrequent, appearing in only 1-5% of patients whose having the acute phase of Chagas Disease (1-5 of every 10,000 infected subjects).