1966
DOI: 10.1016/0002-8703(66)90349-8
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The effect of quinidine on electrical energy required for ventricular defibrillation

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Cited by 30 publications
(4 citation statements)
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“…Cocaine blocks sodium and hERG/Ikr channels and can lead to ventricular fibrillation in susceptible individuals depending on interacting factors such as drug dose and genetic predisposition 11 . Of note, other sodium channel‐blocking antiarrhythmic drugs have shown to increase DFT 12 . Nevertheless, we do not feel this is the mechanism as our patients had a prior history of cocaine use, but were not actually using the drug at the time of implant.…”
Section: Discussionmentioning
confidence: 85%
“…Cocaine blocks sodium and hERG/Ikr channels and can lead to ventricular fibrillation in susceptible individuals depending on interacting factors such as drug dose and genetic predisposition 11 . Of note, other sodium channel‐blocking antiarrhythmic drugs have shown to increase DFT 12 . Nevertheless, we do not feel this is the mechanism as our patients had a prior history of cocaine use, but were not actually using the drug at the time of implant.…”
Section: Discussionmentioning
confidence: 85%
“…Others might speculate that since most antiarrhythmic drugs reduce the excitability of cardiac muscle, and since defibrillation is caused by depolarization of cardiac muscle, most antiarrhythmic drugs would elevate the defibrillation threshold. The only previous report of the influence of an antiarrhythmic drug upon ventricular defibrillation is that of Woolfolk and associates [15] who found that quinidine (10 to 60 mg/kg, intravenously) decreased the likelihood of successful ventricular defibrillation in dogs given transchest shocks of 30, 40, or 50 Watt-seconds. The present studies confirm Woolfolk and colleagues' conclusion and also demonstrate that failure to defibrillate in the presence of quinidine may be reversed by the use of increased electric shock strength.…”
Section: Discussionmentioning
confidence: 99%
“…Os dados disponíveis sobre seus efeitos nos limiares de desfibri-lação ventricular são controversos. Quinidina, procainamida, mexiletine, moricizine e flecainida são fármacos apontados como responsáveis por elevações de limiar de desfibrilação em alguns estudos; contudo, outras séries não conseguiram reproduzir esses resultados, provavelmente em função dos fatores anteriormente citados [2][3][4][5][6][7][8][9][10][11][12][13]15,16 . A lidocaína, um dos agentes antiarrítmicos mais extensamente estudado, eleva os limiares de desfibrilação ventricular, de acordo com a maioria dos estudos realizados [6][7][8][9] ; curiosamente, em uma série conduzida por Ujhelyi e cols., esse efeito só foi observado com a utilização de choques monofási-cos, desaparecendo quando da utilização de choques bifá-sicos 34 .…”
Section: Drogas Antiarrítmicas E Limiares De Desfibrilaçãounclassified