Induction by direct current pulse versus 50-Hz pacing on ventricular fibrillation and defibrillation

Lim, Hoong Sern; Flannigan, Sharon; Marshall, Howard

doi:10.1007/s10840-010-9486-4

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…All the patients developed VF, whereas no patient developed asystole. Lim et al 35 had the same results with 132 patients. The dogma may have been initiated with the 1962 article by Lown et al 36 comparing capacitor pulse shocks to AC for defibrillation.…”

Section: The Curious Dogma Of DC and Asystolementioning

confidence: 58%

The electrophysiology of electrocution

et al. 2023

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Section: The Curious Dogma Of DC and Asystolementioning

confidence: 58%

The electrophysiology of electrocution

et al. 2023

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“…They all developed VF while no patient developed asystole. Lim et al 4 had the same results with 132 patients.…”

mentioning

confidence: 60%

Electrocution

Kroll

Andrews

Panescu

2021

Am J Forensic Med Pathol

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W e read with great interest and enthusiasm the regional population-based autopsy study "The relationship between earlobe creases and the presence, extent, and severity of coronary artery atherosclerosis" by French et al 1 published in the January issue of this esteemed journal. We commend the authors for publishing this essential work with a meticulous description in a logical manner. However, as a supplement, we would like to add a few suggestions and relevant insights that may be of potential interest to your readers.The association between earlobe crease(s) and coronary artery atherosclerosis has been under debate for ages. 2,3 It is a well-known observation that most of the studies fail to control for the important confounders (which by definition influence both the independent variable of interest, ie, the ear lobe crease, and the outcome variable, ie, coronary artery atherosclerosis in this case) such as age, sex, race, and body mass index (BMI). 1 Consequently, the authors aimed to assess if there is a true association between the ear lobe crease and coronary artery atherosclerosis, in a postmortem setting, using a retrospective subgroup analysis among male, female, European, non-European, and all BMI categories. By demonstrating a statistically significant association across all subgroups, the authors have concluded that there is an association between the ear lobe crease and coronary artery atherosclerosis. Furthermore, we would suggest that in addition to the subgroup analysis that the authors aptly implemented, performing a multivariate logistic regression model, 4 by assessing the association between coronary artery atherosclerosis (as an outcome variable) and the ear lobe crease (independent predictor variable of interest), in combination with the confounders such as age, sex, ethnicity, and BMI, can further offer important facts. A statistically significant "beta coefficient or slope" of "ear lobe crease" in such a model would and scrupulous data analysis on the biomedical research.

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“…Furthermore, it is the patients with a low ejection fraction who may potentially have the most benefit of waveform adjustment [19]. Direct current induction of ventricular fibrillation is typically associated with increased DFT as compared with other methods [21] which again could not account for our findings. In this study, 97% of patients with a fixed-tilt device achieved a satisfactory safety margin for DFT which is similar to the previously reported data [14].…”

Section: Discussionmentioning

confidence: 92%

Defibrillation Waveform Duration Adjustment Increases the Proportion of Acceptable Defibrillation Thresholds in Patients Implanted with Single-Coil Defibrillation Leads

2013

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The aim of this study was to determine whether defibrillation waveform duration adjustment with single-coil defibrillation leads can be used to increase the proportion of patients with satisfactory defibrillation thresholds (DFTs). A retrospective analysis of the DFT levels for 105 patients with implantable cardioverter-defibrillator devices and a single-coil defibrillation lead was performed. Two groups of patients were compared: 34 patients who had undergone waveform tuning (group A) and 71 patients with a fixed-tilt waveform (group B). Additional data including demographics, etiology, New York Heart Association functional class, left ventricular ejection fraction, high-voltage lead impedance and medications were gathered to determine what effect these variables had on the DFT levels. Of the 34 patients who had undergone waveform adjustment (group A), 27 (79%) were found to have satisfactory DFTs, while 41 (58%) of the 71 patients with fixed-tilt devices (group B) had satisfactory DFTs. Waveform duration adjustment was found to significantly increase the proportion of patients with satisfactory DFTs (p = 0.03).

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Induction by direct current pulse versus 50-Hz pacing on ventricular fibrillation and defibrillation

Abstract: VF of shorter cycle lengths is independently associated with inadequate DSM. DC pulses are associated with greater proportion of patients with inadequate DSM as it induces VF of shorter cycle lengths compared to 50-Hz pacing.

Cited by 7 publications

References 16 publications

The electrophysiology of electrocution

The electrophysiology of electrocution

Electrocution

Defibrillation Waveform Duration Adjustment Increases the Proportion of Acceptable Defibrillation Thresholds in Patients Implanted with Single-Coil Defibrillation Leads

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