The Implantable Starr-Edwards Pacemaker

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Presentation transcript:

The Implantable Starr-Edwards Pacemaker A. Castellanos, M.D., F.C.C.P., A. Ghahramani, M.D., R.J. Sung, M.D., R.J. Myerburg, M.D. CHEST Volume 68, Issue 4, Pages 608-609 (October 1975) DOI: 10.1378/chest.68.4.608b Copyright © 1975 The American College of Chest Physicians Terms and Conditions

FIGURE 1 During sinus rhythm, small “tracking pulses”3 or “blips”5 are seen on ascending portion of second, third, 11th, and 12th R waves. In contrast, pacemaker-induced (fifth to ninth) QRS complexes are preceded by large stimulus artifacts. CHEST 1975 68, 608-609DOI: (10.1378/chest.68.4.608b) Copyright © 1975 The American College of Chest Physicians Terms and Conditions

FIGURE 2 Magnification of last part of Figure 1. First QRS complex is pacemaker escape; it is followed by three sinus beats. Distortion produced by small “tracking pulses”3 or “blips”5 is more marked in fourth and fifth R waves than in third R wave. CHEST 1975 68, 608-609DOI: (10.1378/chest.68.4.608b) Copyright © 1975 The American College of Chest Physicians Terms and Conditions