Medical Surgical Cardiomyopathy #5

Question

The nursing student understands that a client has an ischemic cardiomyopathy due to which corresponding primary medical diagnosis?

Answers

  1. Myocardial infarction
    • Rationale:

      This answer is correct because a myocardial infarction (MI) is death to tissue of the myocardium due to blocked coronary arteries. These arteries provide oxygenated blood to the myocardium so it can function properly (e.g., contract and pump blood effectively through the heart). Ischemic cardiomyopathy is when the heart muscle becomes enlarged, thickened, and/or unable to pump properly due to a blocked artery in the heart.

  2. Diabetes mellitus
    • Rationale:

      This answer is not correct because although diabetes mellitus (DM) can increase the risk of coronary artery disease, DM is not a condition that blocks the coronary arteries. DM can cause non-ischemic cardiomyopathy. Ischemic cardiomyopathy is when the heart muscle becomes enlarged, thickened, and/or unable to pump properly due to a blocked artery in the heart. A myocardial infarction occurs specifically from a blocked coronary artery.

  3. History of breast cancer
    • Rationale:

      This answer is not correct. Even though breast cancer treatments (certain toxic chemotherapy agents) can cause cardiomyopathy, it is a non-ischemic cardiomyopathy since it is not specifically related to a block artery. Ischemic cardiomyopathy is when the heart muscle becomes enlarged, thickened, and/or unable to pump properly due to a blocked artery in the heart. A myocardial infarction occurs specifically from a blocked coronary artery.

  4. Graves’ disease
    • Rationale:

      This answer is not correct because even though metabolic conditions, such as Graves’ disease, contribute to cardiomyopathy, the underlying reason is not a blockage of an artery or ischemia. Ischemic cardiomyopathy is when the heart muscle becomes enlarged, thickened, and/or unable to pump properly due to a blocked artery in the heart. A myocardial infarction occurs specifically from a blocked coronary artery.

Overview

Ischemic cardiomyopathy is caused by heart attacks (myocardial infarction) and coronary artery disease.

Explanation

Learning Outcomes

Cardiomyopathy is a condition where the heart muscle or myocardium become enlarged, thickened, and/or unable to pump properly. There are various causes for this condition. Ischemic cardiomyopathy is a heart disease, caused by coronary artery disease and myocardial infarction. The blocked coronary arteries cause ischemia or decrease of blood flow to the myocardium which, in turn, causes the muscle to not function properly. The muscle of the affected part (generally the left ventricle) is unable to contract and move oxygenated blood out to the body. This leads to cardiomyopathy.

Test Taking Tip

Understanding the meaning of “ischemia” will help the student choose the correct answer.

Video Rationale