Evaluation of heart failure, Biology

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The initial evaluation of new onset heart failure should include an electrocardiogram, chest radiograph, and B-type natriuretic peptide assay. The cardiac rhythm may be normal sinus, sinus tachycardia, or atrial fibrillation. Left ventricular hypertrophy, left bundle branch block, intraventricular conduction delay, and non-specific ST segment and T wave changes support a diagnosis of heart failure. Q waves in contiguous leads strongly implicate a previous myocardial infarction and coronary atherosclerosis as the etiology. Chest radiographic findings of heart failure include cardiomegaly, pulmonary vascular redistribution, pulmonary venous congestion, Kerley B lines, alveolar edema, and pleural effusions


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