Introduction:The association between cardiac autonomic and left ventricular (LV) dysfunction in Chagas disease (ChD) is controversial. Methods: A standardized protocol that includes the Valsalva maneuver, a respiratory sinus arrhythmia (RSA) test, and an echocardiographic examination was used. Spearman correlation coeffi cients (rho) were used to investigate associations. Results: The study population consisted of 118 ChD patients undergoing current medical treatment, with an average LV ejection frac…
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