National Center for Competency Testing (NCCT) Medical Assistant Practice Test

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Get ready for the NCCT Medical Assistant Test with comprehensive quizzes. Use flashcards and multiple choice questions, each accompanied by hints and detailed explanations. Ensure your success on the exam!

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What term describes an abnormal heart rhythm?

Arrhythmia
Tachycardia
Bradycardia
Fibrillation

The correct answer is: Arrhythmia

The term that describes an abnormal heart rhythm is arrhythmia. Arrhythmias encompass a broad range of heart rhythm irregularities, which can include the heart beating too fast, too slow, or in an erratic pattern. This overarching term captures various specific types of rhythm disturbances that can affect the heart's ability to function effectively. Tachycardia refers specifically to a condition in which the heart rate is significantly elevated, usually defined as a heart rate exceeding 100 beats per minute at rest. Bradycardia, on the other hand, indicates an abnormally slow heart rate, typically defined as fewer than 60 beats per minute. Fibrillation is a specific type of arrhythmia characterized by chaotic electrical activity in the heart, leading to ineffective contractions and a lack of coordinated heartbeat. While tachycardia, bradycardia, and fibrillation are all examples of arrhythmias, the term "arrhythmia" itself is the most inclusive and general term used to describe any abnormal rhythm of the heart.