Various blood tests provide information about your kidneys, liver, thyroid, blood cell count, electrolytes, and blood cholesterol. Your physician will review blood test results you had in the past and determine if any additional testing is required. A blood test called Brain Natriuretic Peptide or “BNP” may be performed to help determine the presence of heart failure. This blood test measures a hormone secreted from the lower chambers of your heart and can help monitor your heart failure condition over time.