Patient Care Technician (PCT) AAH Practice Exam

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What is the primary concern with a high heart rate in atrial tachycardia?

It indicates inadequate blood flow
It may lead to stroke
It can cause lung congestion
It may reduce the heart's pumping efficiency

The correct answer is: It may reduce the heart's pumping efficiency

A high heart rate in atrial tachycardia primarily raises concerns about the heart's pumping efficiency. When the heart beats too quickly, there is insufficient time for the chambers, particularly the ventricles, to fill with blood between contractions. This can lead to a decrease in stroke volume, meaning that the amount of blood ejected with each heartbeat is reduced. Over time, impaired pumping efficiency can cause symptoms such as fatigue, weakness, and even heart failure if the condition persists. While inadequate blood flow, potential stroke risk, and lung congestion are relevant issues in the context of atrial tachycardia, the immediate and direct consequence of an excessively high heart rate is its impact on the heart's ability to effectively pump blood.