ECG Quest > Rhythms > Pacemakers > Failure to capture

Failure to capture

Failure to capture is a pacemaker malfunction where there are pacemaker spikes on the ECG but these do not trigger myocardial depolarisation so they are not followed by the expected ECG waves. Causes include pacemaker lead displacement or damage, electrolyte problems, infarction or conduction block.

See also: Pacemakers

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In the ECGquest archives, this ECG has been tagged with: - Weakness Failure to capture 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Extreme Bradycardia: a Case-Based Lesson in Pacing

This ECG is from a woman who presented with weakness on a background of recent pacemaker insertion.

In the ECGquest archives, this ECG has been tagged with: - Syncope Pacemaker spikes Failure to capture 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 10th September 2018 – Interpretation

This ECG is from a man in his 90s who presented following an episode of syncope.