Certified EkG technician (CET) Practice Exam

Which findings indicate a myocardial infarction?

1. Normal heart sounds

2. Dyspnea

3. Cyanosis

4. Intermittent claudication

The correct answer is: Cyanosis

Cyanosis is a significant finding that suggests a myocardial infarction. During a heart attack, the heart muscle does not receive enough oxygenated blood, which can lead to a decrease in oxygen levels throughout the body. This lack of oxygen can cause tissue damage and lead to symptoms such as cyanosis, which is characterized by a bluish discoloration of the skin and mucous membranes, particularly evident in the lips and fingertips. It indicates that the blood is not adequately oxygenated, which can occur during an inadequate blood supply to the heart muscle. Other options represent different conditions or symptoms relevant in various contexts. Normal heart sounds would typically not indicate any distress in cardiac function, while dyspnea, or difficulty breathing, can occur in many conditions, not exclusively related to a heart attack. Intermittent claudication generally relates to peripheral arterial disease and is not a direct indicator of a myocardial infarction.