Acute phase | |||||
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Chronic phase | |||||
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Indeterminate form | Chronic Chagas cardiomyopathy¶ | ||||
Stage A | Stage B1 | Stage B2 | Stage C | Stage D | |
Symptoms | No current or prior symptoms or signs of chronic Chagas heart disease or gastrointestinal involvementΔ | No current or prior symptoms or signs of chronic Chagas heart diseaseΔ | No current or prior symptoms or signs of chronic Chagas heart diseaseΔ | Current or prior symptoms or signs of chronic Chagas heart diseaseΔ (excluding refractory heart failure requiring specialized interventions); NYHA functional class I, II, III, or IV | Refractory symptoms of heart failure with Chagas heart diseaseΔ (despite optimized evidence-based therapy) requiring specialized interventions; NYHA functional class IV |
ECG | No abnormalities | Variable | Variable | Variable | Variable |
Echo | No abnormalities◊ | Regional wall motion abnormalities may be present Normal global LV and RV function | Impaired global LV and/or RV systolic dysfunction; dilated cardiomyopathy | Impaired global LV and/or RV systolic function; dilated cardiomyopathy | Impaired global LV and/or RV systolic function; dilated cardiomyopathy |
Other radiologic findings | No abnormalities on chest radiograph No radiologic evidence of gastrointestinal involvement§ | No abnormalities on chest radiograph | Variable | Variable | Variable |
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