A patient with a biventricular pacemaker (cardiac resynchronization therapy, CRT) has two ventricular leads. What is the PRIMARY purpose of CRT?
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A
To increase heart rate in patients with bradycardia
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B
To resynchronize left and right ventricular contraction in heart failure patients
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C
To replace the function of the SA node in sick sinus syndrome
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D
To provide backup pacing during complete heart block