The respiratory therapist is asked to evaluate a patient with suspected congestive heart failure. Which of the following laboratory tests should the respiratory therapist recommend to evaluate the patient for possible congestive heart failure?
a. Brain natriuretic peptide (BNP)
b. Lactic dehydrogenase (LDH)
c. Aspartate aminotransferase (AST)
d. Alanine aminotransferase (ALT)
A
The brain natriuretic peptide (BNP), also known as B-type natriuretic peptide or ventricular natriuretic peptide (still BNP) is an important biomarker used to help establish the diagnosis of congestive heart failure (CHF). The BNP hormone is produced by the heart and reflects how well the heart is functioning. Normally, only a low amount of BNP (<100 pg/mL) is found in blood. However, when the heart is working harder than normal over a long period of time, it releases more BNP, increasing the blood level of BNP. The other laboratory tests are not used for congestive heart failure.
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