2. Diagnosis of congestive heart failure with one or both of the following criteria: a Heart Failure Clinical Score ≥ 3 based on the NHANES-I criteria and/or a history of either acute pulmonary edema or the occurrence of 2 or more of the following with subsequent improvement with diuretic therapy and with no other identifiable cause: dyspnea on exertion, paroxysmal nocturnal dyspnea, orthopnea, systemic edema, exertional fatigue.