Electrode Detachment

If an electrode falls off, the leads that rely on it will flatline. You can tell that this is not a real arrest / asystolic ‘flatline’ by looking across the rest of the 12 lead ECG and seeing if there are some leads that are unaffected. If a chest electrode (e.g. V1-V6) falls off, only the one lead will be affected. If a limb electrode (e.g. RA, LA, RL, LL) falls off, many leads will be affected.

See also: Electrode misplacement

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In the ECGquest archives, this ECG has been tagged with: - Chest pain Bradycardia Electrode Detachment Normal Axis Regular Anterior ST elevation Inferior ST elevation Lateral ST elevation Shark fin ST elevation Widespread ST elevation Left main occlusion 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog CC BY-NC
Total eclipse of the heart – 41 min later with crushing chest pain, just before arrest

This ECG is from a man in his 50s who presented with chest pain radiating to the left side and back, nausea, diaphoresis and bilateral finger tingling sensation. This was the repeat ECG about 41 min after arrival, with recurrent crushing chest pain, just before he arrested.