Medical Surgical Labs Cardiac #4

Question

Which lab value is the biggest indicator of heart failure?

Answers

  1. ANP
    • Rationale:

      This answer is not correct because although ANP is a lab test studied for heart failure, its value shows that there is a problem happening within the heart, yet also an indicator for hyperthyroidism, small cell lung cancer, or supraventricular tachycardia when it is elevated. It can also decrease after a long period of time when the problem is chronic.

  2. BNP
    • Rationale:

      This answer is correct because BNP measures the damage and function of the heart from heart failure. BNP is a protein made by the heart and blood vessels. It is higher in clients with heart failure.

  3. Troponin
    • Rationale:

      This answer is not correct because troponins are proteins released into the bloodstream during a heart attack. Increased amount of troponin releases when damage to the heart muscle occurs.

  4. D-dimer
    • Rationale:

      This answer is not correct because the D-dimer test is used to rule out blood clots. D-dimer is a protein fragment that is made when a blood clot dissolves in the body.

Overview

BNP (brain natriuretic peptide) is a protein made by the heart and blood vessels. It is higher in clients with heart failure.

Explanation

Learning Outcomes

BNP measures the damage and function of the heart from heart failure. BNP is a protein made by the heart and blood vessels. It is higher in clients with heart failure. ANP is a lab test studied for heart failure, its value shows that there is a problem happening within the heart, yet also an indicator for hyperthyroidism, small cell lung cancer, or supraventricular tachycardia when it is elevated. Troponins are proteins released into the bloodstream during a heart attack. Increased amount of troponin releases when damage to the heart muscle occurs. D-dimer test is used to rule out blood clots. D-dimer is a protein fragment that is made when a blood clot dissolves in the body.

Test Taking Tip

Think of the “B” in BNP as “BIG stretched out ventricles” which is what occurs in CHF.

Video Rationale