Question 217 · LEK · Automaticity and conduction disorders
The figure shows an ECG during external stimulation in a patient with symptomatic bradycardia, in which the arrows indicate stimulation artifacts. Identify the true statement:
- A. stimulation was effective, at a good frequency and current.
- B. stimulation was effective, at too low a frequency and too high a current.
- C. stimulation was effective, at a good frequency and too low a current.
- D. stimulation was ineffective, at a good fequency and too low a current.
- E. stimulation was ineffective, at too low a frequency and a good current.
Hint
Check whether every pacing spike is followed by a wide paced QRS, and compare the set current with typical transcutaneous capture thresholds.
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