Cardiac Arrhythmias Flashcards
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Read the first 5 Cardiac Arrhythmias flashcards as text
What is the most common type of cardiac arrhythmia?
Answer: Atrial fibrillation
Atrial fibrillation (AFib) is the most common arrhythmia, characterized by irregular and often rapid heart rhythm.
What does a prolonged PR interval indicate on an ECG?
Answer: First-degree heart block
A prolonged PR interval (>0.20 seconds) is indicative of delayed conduction between the atria and ventricles.
Which arrhythmia is life-threatening and requires immediate defibrillation?
Answer: Ventricular fibrillation
Ventricular fibrillation is a chaotic and ineffective rhythm that prevents proper blood circulation and can lead to sudden cardiac arrest.
What is the defining characteristic of ventricular tachycardia (VT)?
Answer: Rapid, regular rhythm originating from the ventricles
VT is a fast, regular rhythm that can compromise cardiac output and lead to ventricular fibrillation if untreated.
Which of the following arrhythmias is often seen in healthy individuals during sleep?
Answer: Sinus bradycardia
Sinus bradycardia, a slower-than-normal heart rate, is often benign and can occur during sleep or in athletes.
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