ventricular fibrillation/نيكوتين

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Nicotine Increases Spatiotemporal Complexity of Ventricular Fibrillation Wavefront on the Epicardial Border Zone of Healed Canine Infarcts.

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BACKGROUND: The influence of a pharmacologic agent on wavefront dynamics during ventricular fibrillation (VF) in a setting of remodeled and healed myocardial infarction (MI) remains poor explored. We hypothesized that nicotine, by virtue of its complex direct and indirect cardiovascular effects,

Holter ECG diagnosis of nicotine-spray induced ventricular fibrillation. An unusual case of Prinzmetal variant angina

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We report on an interesting case of resuscitated sudden cardiac death (SDC) in a 51-year-old with hypertension and positive family history for SDC. The patient was resuscitated and an emergency angiogram ruled out coronary artery disease. Cardio-MRT ruled structural disease or infection. Holter and

Arrhythmogenic Risk Assessment Following Four-Week Pretreatment With Nicotine and Black Tea in Rat.

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BACKGROUND There is the controversy concerning the main component of tobacco, which is responsible for its arrhythmogenesis. In addition, there is the lack of adequate information about the influence of combination of black tea and nicotine on heart rhythm. OBJECTIVE This study aimed to examine

Nicotine increases ventricular vulnerability to fibrillation in hearts with healed myocardial infarction.

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The vulnerability of the infarcted hearts to ventricular fibrillation (VF) was tested in in situ canine hearts during nicotine infusion. The activation pattern was mapped with 477 bipolar electrodes in open-chest anesthetized dogs (n = 8) 5-6 wk after permanent occlusion of the left anterior

Differential cardiac responses induced by nicotine sensitive canine atrial and ventricular neurones.

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OBJECTIVE The aim was to study the locations and functions of atrial and ventricular nicotine sensitive neurones. METHODS In anaesthetised open chest dogs, cardiovascular effects elicited by nicotine (100 micrograms in 0.1 ml 0.9% saline), administered at specific loci of in situ atrial and

Cardiac Arrhythmias Following Intravenous Nicotine: Experimental Study in Dogs.

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BACKGROUND: Nicotine, the active agent in tobacco, is released into the circulation during cigarette smoking. It elevates plasma catecholamines, heart rate, and arterial blood pressure; produces coronary spasm; and increases myocardial work and oxygen demand with concomitant reduction in oxygen

Smokeless tobacco, sport and the heart.

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Smokeless tobacco (snuff) is a finely ground or shredded tobacco that is sniffed through the nose or placed between the cheek and gum. Chewing tobacco is used by putting a wad of tobacco inside the cheek. Smokeless tobacco is widely used by young athletes to enhance performance because nicotine

Cardiac arrest due to ventricular fibrillation in a 23-year-old woman with broken heart syndrome.

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Broken heart syndrome, also known as takotsubo cardiomyopathy, is a syndrome characterized by a transient regional systolic dysfunction of the left ventricle associated to a psychological stress. We herein describe a case of a 23-year-old female habitual marijuana user who was resuscitated after

[Action of regulators of peripheral cholinergic processes on development of early arrhythmia in myocardial ischemic rats].

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Occlusion of the left coronary artery in rats provoked ventricular tachycardia (VT) and ventricular fibrillation (VF) within the first 30 min of ischemia leading to death in 20% animals. Methacin (i.v., 100 micrograms/kg) significantly prolonged VT and VF without effects on the survival.

[Acute eosinophilic pneumonia and illicit psychoactive substance use].

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Illicit psychoactive substance (IPAS) use can lead to a number of respiratory complications, including acute eosinophilic pneumonia (AEP). Systematic literature review of data on AEP in IPAS users (cannabis, cocaine, heroin and amphetamine). Of two cases of cannabis and tobacco users reported to

Acute effects of smoking on QT dispersion in healthy males.

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BACKGROUND Cigarette smoking increases the risk of ventricular fibrillation and sudden cardiac death (SCD). QT dispersion (QTD) is an important predictor of cardiac arrhythmia. The aim of this study was to assess the acute effect of smoking a single standard cigarette containing 1.7 mg nicotine on

ECG Changes in Smokers and Non Smokers-A Comparative Study.

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BACKGROUND Tobacco consumption is the single most cause of the preventable deaths globally. Tobacco is consumed in the form of cigarettes. It contains nicotine which causes physical and psychological dependencies. Cigarette smoking increases the blood coagulability. Nicotine facilitates conduction

Impact of gender on in-hospital outcomes in patients with Takotsubo syndrome: A nationwide analysis from 2006 to 2014.

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BACKGROUND Takotsubo syndrome (TTS) is characterized by acute, transient systolic dysfunction of the left ventricle not attributed to coronary artery disease (CAD). OBJECTIVE There are differences in hospital outcomes in patients admitted with TTS based on their gender. METHODS The National

Cigarette smoking and the risk of supraventricular and ventricular tachyarrhythmias in high-risk cardiac patients with implantable cardioverter defibrillators.

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BACKGROUND Nicotine elevates serum catecholamine concentration and is therefore potentially arrhythmogenic. However, the effect of cigarette smoking on arrhythmic risk in coronary heart disease patients is not well established. RESULTS The risk of appropriate and inappropriate defibrillator therapy

[Medical and psychological problems of smoking].

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In the medical part of this review the devastating role of the "modern plague" smoking is exposed. The numerous and variable diseases of this habit or dependence are depicted. The most serious consequences of smoking concern--next to pulmonary diseases--the vascular system. Smokers are at risk for

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