Transcutaneous pacing artefact

This is an unusual artefact caused by a transcutaneous pacemaker. The pacing causes the chest wall muscles to contract. This muscular activity can look a bit like a QRS complex, but if there is no T wave after each ‘beat’ and no pulse then the pacemaker is not really working (there is no ‘capture’ of the heart muscle).

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In the ECGquest archives, this ECG has been tagged with: - Rhythm Strip Transcutaneous pacing artefact Pacemaker spikes Failure to capture ECG Guru CC-BY-NC-SA
Transcutaneous Pacemaker: Failure to Capture and False QRS Artifact 1011