The phenomenon of post-extrasystolic potentiation is observed in a significant proportion of patients with chronic Chagas' heart disease, in whom the phenomenon could be angiographically analyzed, indicating the existence of potentially recruitable contractile reserve in ventricular regions, showing marked dyssynergy. Additional studies for clarifying the underlying mechanisms are required.
A grafia discinergia (e suas variações) foi mantida conforme o original. Projeto parcialmente financiado pelo CNPq (Processo N o 520478/95-9) e pela FAPESP (Processo N o 1995/6195-8).
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