Enhancing risk assessment in Chagas cardiomyopathy: Electrophysiology study stratified by Rassi score.

Background: Chagas cardiomyopathy (CCM) is increasingly prevalent in developed countries due to migration from endemic areas. Accurate risk stratification is crucial due to the variable clinical course of CCM.

Objective: To analyze the association between Rassi score progression and electrophysiology study (EPS) changes in CCM patients.

Epicardial mapping of sustained ventricular tachycardia in nonischemic heart disease.

Background: The complexity of reentrant circuits related to ventricular tachycardias decreases the success rate of radiofrequency ablation procedures.

Objective: To evaluate whether the epicardial mapping with multiple electrodes carried out simultaneously with the endocardial mapping helps in ablation procedures of sustained ventricular tachycardia (VT) in patients with nonischemic heart disease.

Methods: Twenty-six patients with recurrent sustained VT, of which 22 (84.