Remove ecg right-ventricular-demand-pacemaker
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Emergency (ED placement) Transvenous Pacer appears to be working perfectly. What might go wrong?

Dr. Smith's ECG Blog

Capture was obtained and a 12-lead ECG was recorded: What do you see here and what complication can occur? Asynchronous pacing seems like the safe setting, EXCEPT that it means that the pacemaker can trigger on the T-wave, which can result in Ventricular Fibrillation. Demand mode is when the pacer is sensing.

EKG/ECG 52