Cardiac Arrhythmias Following Condenser Discharges Led Through an Inductance:

Peleska, B; Blažk, Z.; Rabl, Michael; Sladkova, E. A.

doi:10.1161/01.res.16.1.11

Cited by 39 publications

(6 citation statements)

References 4 publications

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“…• The efficacy of various types of transthoracic shocks in reversing ventricular fibrillation and other cardiac arrhythmias has been extensively studied by numerous investigators (1)(2)(3)(4)(5)(6)(7)(8)(9). Because the character of the shocks delivered by the conventional or commercial apparatus used in these studies could be varied in only a very restricted fashion, the studies were more useful as a guide to immediate clinical application than for the elicitation of fundamental information concerning the defibrillation process.…”

Section: Introductionmentioning

confidence: 99%

Transthoracic Ventricular Defibrillation with Triangular and Trapezoidal Waveforms

Schuder

Rahmoeller

Stoeckle

1966

Circulation Research

114

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From 7,200 fibrillation-defibrillation episodes in anesthetized dogs, the effectiveness of 6 classes of unidirectional shocks in reversing ventricular fibrillation of 30-sec duration was determined. The shocks lasted for 1 to 256 msec. Three waveforms (ascending ramp triangular, descending ramp triangular, and trapezoidal) were studied at peak currents of 10 amp and 20 amp. Families of curves of per cent success vs. energy were derived from the data for the 6 classes of waveforms studied and from corresponding curves for 3 classes of unidirectional square-wave shocks previously studied by our group. The families of curves were used as a basis for an analysis of the influence of various parameters on the effectiveness of shocks. We conclude that an appropriate energy content is a necessary, but not sufficient condition for effective ventricular defibrillation, that long, low-amplitude tails on shocks are detrimental and that excessive energy content is detrimental.ADDITIONAL KEY WORDS energy content of shock electrical stimuli fibrillation refibrillation high power amplifier closed-chest defibrillation cardiac arrhythmias anesthetized dogs

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Section: Introductionmentioning

confidence: 99%

Transthoracic Ventricular Defibrillation with Triangular and Trapezoidal Waveforms

Schuder

Rahmoeller

Stoeckle

1966

Circulation Research

114

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“…Mackay and Leeds (11), on the basis of a study of dogs weighing 8-12 kg, showed that electrical energy was the appropriate electrical parameter for indicating the requirement for defibrillation. Others (12)(13)(14)16) have proposed that the current that flows is a better descriptor for the electrical dose required for defibrillation. Without arguing the issue of the superiority of current over energy for specifying the dose for ventricular defibrillation, Fig.…”

mentioning

confidence: 99%

Electrical Dose for Ventricular Defibrillation of Large and Small Animals Using Precordial Electrodes

Geddes¹,

Tacker²,

Rosborough³

et al. 1974

J. Clin. Invest.

133

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A B S T R A C T Electrical ventricular defibrillation of heavy subjects (over 100 kg body weight) is uncommon for the human or any animal species. This paper reports trans-chest ventricular defibrillation of subjects ranging in weight from 2.3 to 340 kg using conventional defibrillation current (heavily damped sine wave) of 0.3-30 ms duration. It was found that a body weight-toelectrical-shock strength relationship exists and can be expressed in terms of either electrical energy or peak current. For the duration of current pulse used clinically (3-10 ms), the relationship between energy requirement and body weight is expressed by the equation U = 0.73 W"52, where U is the energy in W s and W is the body weight in kilograms. The current relationship is I = 1.87 W0 M where I is the peak current in amperes and W is the body weight in kilograms. The energy dose is somewhat more species and weight dependent and ranges from 0.5 to 10 W s/kg (0.23-4.5 W s/lb). The data obtained indicate that the peak current dose is virtually species and weight independent and is therefore a better indicator than energy for electrical defibrillation with precordial electrodes. In the duration range of 3-10

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“…In 1957, Bohumil Peleška, from Prague, Czechoslovakia, reported on both direct and transthoracic use of DC shock for defibrillation purposes 24. He constructed his own DC defibrillator, modifying Gurvich’s design by including an iron core in the inductor,25 and is credited with improving the procedure of cardioversion by using lower voltage and describing the effects of DC shock. Thus, the original work on biphasic defibrillation waveforms and DC cardioversion and defibrillation had originated initially in the East.…”

Section: Historymentioning

confidence: 99%