Download Catheter Ablation of Cardiac Arrhythmias: Basic by Phyllis M. Holt, E. G. Boyd (auth.), Melvin M. Scheinman PDF

By Phyllis M. Holt, E. G. Boyd (auth.), Melvin M. Scheinman (eds.)

The box of catheter ablation has grown In a slightly helter-skelter model. Ablative innovations have been utilized in sufferers ahead of uncomplicated bioelectric and mobile electrophysiologic results have been totally outlined. because the advent of this method into medical drugs in 1982, fortunately, a wealth of simple info has develop into on hand, and it used to be proposal prudent to summarize latest facts within the type of a textual content. the aim of this article is to supply for a concise precis of either the fundamental and medical reviews so far. It was once easily impossible to incorporate chapters from many employees who've made remarkable contributions during this region. For this, I provide my profound apolo­ gies. I do want, although, to recognize the exceptional paintings of Drs. Bharati and Lev who supplied us with a legitimate figuring out of the histolo­ gic results of assorted power supply structures. Their seminal observations allowed us to carry this method to scientific fruition.

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Extra resources for Catheter Ablation of Cardiac Arrhythmias: Basic Bioelectrical Effects and Clinical Indications

Sample text

Examples of a conduction velocity determination in a control tissue and in a tissue followin g a highenerg y electrical shock are shown in figure 2-3. 8 mm =========== 0 100 msec Figure 2-4. 5 mm diameter) following a high-energy electrical shock (5 joules). There was a progressive decrement in resting membran e potential, action potential amplitude, and dV/dT as the distance of the impalement from the cathode decreased. At very close distances « 2 mm), no action potentials were recorded. (From Levine.

Shown are summary data for (A) action potential amplitude (APA), (B) the maximum rate of depolarization (dV /dT), and (C) resting membrane potential (RMP) for impalements within 5 mm of the cathode before and after the high-energy electrical discharge. 001). 46 2. Cellular electrophysiology of electrical discharges Figure 2-6. An example demonstrating the histopathologic changes seen after high-energy ablation. Distal from the crater, focal areas of contraction band necrosis were seen (center).

40. Homburger H, Rossner JA, Antoni H: Ultrastructural findings after injury of isolated heart muscle tissue of the guinea pig by direct currents (German) Bietr Ersten Hife Bahalldl UnfaUer1 Elektr Strom 7: 140-181 , 1976. 41. Anderson HN, Reich enback D, Steinmetz GP Jr, Merendino KA: An evaluation and comparison of effects of alternating and direct current electrical di scharges on canine hearts. AI1I1 Surg 160: 251-262, 1966. 42. Dahl CF, Gwy GA . Warner ED, Thomas ED: Myocardial necrosis from direct current countershock.

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