{"10":"Workload >7 METs but ≤10 METs resulting in dyspnea, fatigue, angina, dizziness, or syncope; or continuous medication required.","30":"Workload >5 METs but ≤7 METs; or evidence of cardiac hypertrophy/dilatation on EKG, echocardiogram, or X-ray.","60":"More than one episode of acute CHF in the past year; or workload >3 METs but ≤5 METs; or left ventricular dysfunction with EF 30-50%.","100":"Chronic CHF; or workload ≤3 METs; or left ventricular dysfunction with EF <30%."}