Telomeres are the protective caps on the ends of chromosomes that affect how quickly cells age. They are combinations of DNA and protein that protect the ends of chromosomes and help them remain stable. As they become shorter, and as their structural integrity weakens, the cells age and die quicker.
See p 2392. B-type natriuretic peptide (BNP) is a neurohormone secreted mainly in the cardiac ventricles in response to volume expansion and pressure overload.1,2 Activation of BNP in patients with left ventricular (LV) dysfunction has generated considerable interest in both its diagnostic and prognostic properties.
Brain-Type Natriuretic Peptide (BNP) - Collection and Panels. 1  The test can be drawn at any time during the day. The patient does not need to be fasting and no specific preparation from the patientâs side is required. 2  The test is a spot blood sample. Specifics for collection and panels are as follows...