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Questions and Answers
What is the role of the SA node in the heart's conduction system?
What is the role of the SA node in the heart's conduction system?
- Generating abnormal heart rhythms
- Acting as the pacemaker of the heart (correct)
- Slowing down the heart rate irregularly
- Speeding up the heart rate
What condition is characterized by a regular but slow heart rate?
What condition is characterized by a regular but slow heart rate?
- Ventricular tachycardia
- Atrial flutter
- Ventricular fibrillation
- Bradycardia (correct)
Which atrial abnormality involves contracting outside the normal conduction pathway?
Which atrial abnormality involves contracting outside the normal conduction pathway?
- Atrial fibrillation
- Sick sinus syndrome
- Premature atrial contractions (correct)
- Atrial flutter
What is the main risk associated with atrial fibrillation?
What is the main risk associated with atrial fibrillation?
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What occurs in a third-degree heart block?
What occurs in a third-degree heart block?
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Which ventricular abnormality involves muscle fibers contracting independently and rapidly?
Which ventricular abnormality involves muscle fibers contracting independently and rapidly?
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What effect can ventricular tachycardia have on cardiac output?
What effect can ventricular tachycardia have on cardiac output?
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What distinguishes bundle branch block as a ventricular conduction abnormality?
What distinguishes bundle branch block as a ventricular conduction abnormality?
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What is a key characteristic of premature ventricular contractions (PVCs)?
What is a key characteristic of premature ventricular contractions (PVCs)?
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What distinguishes sick sinus syndrome among sinus node abnormalities?
What distinguishes sick sinus syndrome among sinus node abnormalities?
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