Atrial pacemaker

An artificial atrial pacemaker stimulates the atria to generate a rhythm. The most common type is AAI, where the atria are sensed to detect if there is an adequate intrinsic rhythm and pacing is only delivered if required. This causes a pacemaker spike before the p wave.

See also: Pacemakers

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ECG Library (14)

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In the ECGquest archives, this ECG has been tagged with: - 12-Lead Concordant ST depression in V1-V3 Excessive discordant ST elevation Atrial pacemaker Ventricular pacemaker Acute Inferior MI Acute Lateral MI Acute Posterior MI Positive Sgarbossa criteria Dr Smith's ECG Blog CC BY-NC
Can you see through this paced rhythm?

This ECG is from an elderly woman who presented with 2 hours of chest pain on a background of multiple stents, a pacemaker, stroke and COPD.

This ECG shows paced rhythm with excessively discordant ST segments (modified Sgarbossa positive). The cause was a 95% thrombotic lesion of the RCA.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Serial 12-lead Inverted T waves Pacemaker spikes Wide QRS Atrial pacemaker Ventricular pacemaker Dr Smith's ECG Blog CC BY-NC
A 50-something with h/o coronary bypass has chest pain and a ventricular paced rhythm – 5, post cath

This ECG is from a man in his 50s who presented with chest pain on a background of previous CABG and dual chamber pacemaker. This was the second repeat ECG after intervention.

This ECG shows dual chamber paced rhythm with some native beats.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Serial 12-lead Inverted T waves Pacemaker spikes Atrial pacemaker Dr Smith's ECG Blog CC BY-NC
A 50-something with h/o coronary bypass has chest pain and a ventricular paced rhythm – 4, post intervention

This ECG is from a man in his 50s who presented with chest pain on a background of previous CABG and dual chamber pacemaker. This was the repeat ECG post intervention.

This ECG shows atrial pacing with resolved ST elevation but T wave inversion in inferior leads and upright T wave in aVL. The cause was an inferior and right ventricular MI.