The nurse notes that the QRS duration of a patient with a biventricular pacemaker is widening? What does this most likely indicate?
1. Worsening of the patient's underlying cardiomyopathy
2. Loss of ventricular capture
3. Loss of ventricular synchronization
4. Battery failure
3
Rationale 1: This is not an indication that the patient's underlying condition is getting worse.
Rationale 2: This does not indicate loss of ventricular capture.
Rationale 3: Widening of the QRS duration from the baseline may indicate a loss of ventricular synchronization.
Rationale 4: This does not indicate battery failure.
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