QuestionSBA
QuestionChoice
This is incorrect. This describes complete heart block. Sinus arrhythmia refers to the normal fluctuations in heart rate associated with breathing.
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d
A desynchronization of atrial and ventricular contraction due to damage to the AV node
QuestionChoice
This is correct. It is normal in young, healthy individuals to see fluctuations in the heart rate associated with breathing. There is a drop in heart rate during expiration and a rise during inspiration. This is called sinus arrhythmia.
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a
Normal fluctuations in heart rate are associated with breathing
QuestionChoice
This is incorrect. This describes ventricular tachycardia. Sinus arrhythmia refers to the normal fluctuations in heart rate associated with breathing.
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c
A rapid, irregular heartbeat originating from the ventricles
QuestionChoice
This is incorrect. This describes Wolff-Parkinson-White syndrome. Sinus arrhythmia refers to the normal fluctuations in heart rate associated with breathing.
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e
An abnormal accessory pathway from the atrium to the ventricle resulting in periods of tachycardia
QuestionChoice
This is incorrect. This describes atrial fibrillation. Sinus arrhythmia refers to the normal fluctuations in heart rate associated with breathing.
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b
An irregularly irregular heartbeat originates from the atria
Concept
Chapter
2693
5884
Autonomic Nervous System
Topic
159
Cardiovascular physiology
17667
Which of the following is the correct explanation of sinus arrhythmia?
a