Download Electrocardiographic Body Surface Mapping: Proceedings of by B. Taccardi (auth.), R. Th. van Dam, A. van Oosterom (eds.) PDF

By B. Taccardi (auth.), R. Th. van Dam, A. van Oosterom (eds.)

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Circulation 41: 343-359, 1970. Brusca A and Rosettani E: Activation of the Human Fetal Heart. Am Heart J 86: 79-87, 1973. Chapter 4 RECOGNITION OF EPICARDIAL BREAKTHROUGH BY BODY SURFACE ISOPOTENTIAL MAPPING T. OHTA, S. USUI, M. HIRAI, J. TOYAMA, K. YAMADA 1. INTRODUCTION An advantage of body surface isopotential maps is the detection of the breakthrough of the activation front into the right ventricular epicardium. Previous recognition of this breakthrough phenomenon has been based solely on specific spatial potential distributions including niche or breakthrough minimum.

This gradual electrocardiographic development is reflected in the evolution of the body surface potential distribution showing a pattern of right ventricular preponderance which is still present at the end of the first week but has become less pronounced. J. G. J. E. Grimbergen and P. Broekhuijsen for their help and support in the realization of this study. Tazawa Il and Yoshimoto C: Electrocardiographic Potential Distribution in Newborn Infants from 12 Hours to 8 Days after birth. Am Heart J 78: 292-305, 1969.

Day 1 day 617 left subclavicular FIGURE 7. The location of the at its indicated minimum is appearance on the first day BSM and on the 6/7th day BSM. At the day, the mlnlmum found b/7th depolarizaventricular during tion, tends to appear more often at the left axillary region. 4. DISCUSSION At birth the elimination of the low resistance placental circulation and subsequent rise in systemic vascular resistance leads to an increasing work load on the left v2ntricle. The ductus arteriosus and foramen ovale close and although a left to right shunt persists after birth this shunt is markedly decreased at the end of the first week causing a second gradual increase in left ventricular load (6).

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