1. Volume 73, Issue 1, Pages 120-121 (January 1978)
Electrocardiographic Artifact Caused by Pacemaker Pulse-Width Controller 
James E. Davia, MC, USA, Carlos M. DeCastro, MC, USA, Thomas E. Bowen, MC, USA, Paul L. Shetler, MC, USA, David C. Green, MC, USA 
CHEST 
Volume 73, Issue 1, Pages (January 1978)
DOI: /chest b
Copyright © 1978 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Electrocardiographic strips demonstrate artifact that resembles ventricular arrhythmia
CHEST  , DOI: ( /chest b)
Copyright © 1978 The American College of Chest Physicians Terms and Conditions