this is a test that measures the time it takes for the electrical impulse to travel from the atria to the ventricles
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Nursing Elites

ATI RN

Cardiovascular System Exam

1. What does the PR interval measure?

Correct answer: A

Rationale: The PR interval measures the time it takes for the electrical impulse to travel from the atria to the ventricles. It is crucial in diagnosing heart rhythm disorders, as abnormalities in this interval can indicate conduction abnormalities between the atria and ventricles. Choices B, C, and D are incorrect. The QRS complex represents ventricular depolarization, the QT interval represents the duration of ventricular repolarization, and the ST segment represents the time between ventricular depolarization and repolarization.

2. What condition involves the heart's electrical system malfunctioning, causing very fast heartbeats originating from the ventricles?

Correct answer: A

Rationale: Ventricular tachycardia is the correct answer. It is a condition characterized by the heart's electrical system malfunctioning, leading to very fast heartbeats originating from the ventricles. Ventricular tachycardia can be life-threatening as it may progress to ventricular fibrillation, causing cardiac arrest. Atrial fibrillation (choice B) involves rapid, irregular beating of the atria, not the ventricles. Supraventricular tachycardia (choice C) originates above the ventricles and does not involve ventricular malfunction. Bradycardia (choice D) is the opposite of tachycardia, characterized by an abnormally slow heart rate.

3. The healthcare provider is monitoring a client on an ACE inhibitor. What lab value is most important to monitor?

Correct answer: A

Rationale: The correct answer is A: Potassium. When a client is on an ACE inhibitor, it is crucial to monitor potassium levels because ACE inhibitors can lead to an increase in potassium, potentially causing hyperkalemia. Monitoring sodium levels (Choice B) is not as critical in this scenario. Creatinine levels (Choice C) are important for assessing kidney function but are not the most crucial lab value to monitor with ACE inhibitors. Calcium levels (Choice D) are not directly affected by ACE inhibitors and are not the priority for monitoring in this case.

4. What is a surgical procedure to redirect blood flow around a blocked or narrowed artery, often involving the use of a graft from another part of the body?

Correct answer: A

Rationale: The correct answer is A: Coronary artery bypass graft (CABG). This surgical procedure is used to redirect blood flow around a blocked or narrowed artery by using a graft from another part of the body. Choices B, C, and D are incorrect because valve replacement involves replacing heart valves, aneurysm repair addresses the treatment of aneurysms, and atherectomy is a procedure to remove plaque from blood vessels, none of which match the description provided in the question.

5. What is a chronic condition where the heart muscle becomes weakened and enlarged, reducing its ability to pump blood effectively?

Correct answer: A

Rationale: Dilated cardiomyopathy is characterized by the weakening and enlargement of the heart muscle, leading to its reduced ability to pump blood effectively. This condition is different from hypertrophic cardiomyopathy, which involves abnormal thickening of the heart muscle, myocarditis, which is inflammation of the heart muscle, and pericarditis, which is inflammation of the pericardium. Therefore, the correct answer is Dilated cardiomyopathy.

Similar Questions

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The client on spironolactone should avoid which of the following?
This is a test that measures the oxygen saturation level in the blood, often used to assess respiratory function.
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Which condition occurs when the heart muscle is damaged due to a lack of oxygen, often resulting from a heart attack?

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