من ال investigation لل heart failure هي ارتفاع BNP :
Brain natriuretic peptide (BNP) is a peptide hormone that is released in response to volume expansion and the increased wall stress of cardiac myocytes.
BNP helps to promote diuresis, natriuresis, vasodilation of the systemic and pulmonary vasculature, and reduction of circulating levels of endothelin and aldosterone.
Elevated in renal faiure , hypertension , COPD , pulmonary embolism , ARDs