A post from March 15 on the A & S Research website simply states, âToday is a sad day to report the passing of Dr. Roger K. Leir, we have lost a great family man, podiatrist and devoted ufologist. He will be greatly missed by all.â.
On the ECG, failure to capture is identified by the presence of pacing spikes without associated myocardial depolarization. Causes include pacing lead problems, battery or component failure, low pacing voltage or elevated myocardial pacing thresholds, and exit block.
Pacemaker malfunction includes failure to pace, failure to capture, undersensing, and pacemaker-mediated dysrhythmias. Failure to pace occurs when the pacemaker does not fire when pacing should occur. On the ECG, there are no visible pacing spikes where they should have occurred.