Which description best fits a ventricular escape rhythm rate?

• A. 2-3 atrial depolarizations per ventricular depolarization
• B. 1:1 AV conduction
• C. 30-40 bpm
• D. Atrial tachycardia

Answer: (C)

When the heart’s higher pacemakers fail, the ventricles take over with their own slow pacing, called a ventricular escape rhythm. This rhythm comes from ventricular or Purkinje tissue and has a low intrinsic rate, typically around 20–40 beats per minute, with 30–40 bpm being a common, easily remembered range. That’s why describing the rate as 30–40 bpm best fits a ventricular escape rhythm.

The other patterns don’t match this situation: a 1:1 AV conduction implies normal or near-normal conduction from atria to ventricles, not an intrinsic ventricular pacemaker taking over. Atrial tachycardia refers to a fast rhythm originating in the atria, which would usually drive a faster ventricular rate if conduction is present. And 2–3 atrial depolarizations per ventricular depolarization suggests a specific AV relationship that isn’t characteristic of an isolated ventricular escape rhythm.