Prevalence of Right Ventricular Dysfunction in Chagas Disease
Does This Depend on the Method Used? Usefulness of Cardiac Magnetic Resonance
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Right ventricular (RV) impairment in Chagas disease has been reported in all stages of the disease.1–5 There has been disagreement whether RV functional and anatomic abnormalities may be an isolated finding preceding left ventricle (LV) abnormalities or are secondary to LV dysfunction. Several methods have been used to assess RV function in patients with Chagas disease, showing somewhat discordant results. Radionuclide angiography suggested an early predominant RV dysfunction.1,2 These variable data may be attributed to the different parameters used to assess RV function and the evaluation of patients at distinct stages of Chagas disease progression.3,5–7 Early subtle abnormalities have been detected in RV function, but the clinical significance of these changes is unknown.1,3 It is increasingly recognized that the RV plays an important role in functional capacity8 and prognosis of Chagas disease patients, which are not only dependent on the severity of LV systolic function, but also influenced by other factors.5,9
See Article by Moreira et al
Although echocardiography is the mainstay of RV evaluation in Chagas disease, identifying an …