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.
Typically the cause can be identified as a: 1  design deficiency - when the mechanical, electrical or other components of the design have a problem that caused the mishap. 2  equipment malfunction - when the machine operated incorrectly. 3  manufacturing defect - when the material or assembly has an issue that causes it to fail.