The importance of the central nervous system in the antiarrhythmic actions of diphenyhiydantoin and lidocaine was studied using arrhythmias induced by electrical stimulation of the posterior hypothalamus in cats. Hypothalamic stimulation resulted in cardiac arrhythmias mediated by the sympathetic nervous system. The arrhythmias occurred during stimulation, and recordings from cardiac sympatheti...

Certain arrhythmias are observed in healthy relatively young individuals without evidence of structural heart disease, and mostly asymptomatic that fall under the generic term of “idiopathic” to describe various forms of ventricular arrhythmias from isolated premature beats (VPBSs) to sustained tachycardia. So far, the term idiopathic arrhythmias has only be applied to ventricular arrhythmias, ...

Result: Serum potassium concentrations were significantly decreased with the severity of arrhythmias (no arrhythmias; 4.2 ± 0.80 mmol/l, supra-ventricular; 3.8 ± 0.9 mmol/l, and ventricular arrhythmias; 3.3 ± 0.5 mmol/l, p=0.0001). The risks of supra-ventricular and ventricular arrhythmias were significantly increased by 2.4 and 8.3 fold, respectively in patients with serum potassium levels at ...

Wacker, Michael J., Shaun R. Best, Lisa M. Kosloski, Christopher J. Stachura, Rory L. Smoot, Charles B. Porter, and James A. Orr. Thromboxane A2-induced arrhythmias in the anesthetized rabbit. Am J Physiol Heart Circ Physiol 290: H1353–H1361, 2006. First published December 9, 2005; doi:10.1152/ajpheart.00930.2005.—Experiments were conducted in the anesthetized rabbit to investigate mechanisms f...

The incidence and significance of the development of ventricular arrhythmias during insertion and removal of pulmonary artery monitoring catheters were determined in stable postcardiac surgical patients. Insertion of 173 (69 percent) of 250 catheters was associated with ventricular arrhythmias and removal in 158 (63 percent) of these catheters (p greater than 0.05). All arrhythmias resolved spo...

Objective: In ventricular arrhythmias, due to their free radical scavenging action, antioxidant agents are usually used in the treatment of cardiovascular disease. Since stress is considered as risk factor for increased mortality by causing malignant arrhythmias, the study was designed to evaluate the cardioprotective effects of ellagic acid (EA) on CaCl2-induced arrhythmias in rat stress model...

background: there are some reports on the association between air pollution and myocardial infarction, arrhythmia, and mortality due to cardiac problems in susceptible individuals. we aimed to evaluate the association of air pollution and the emergency visits due to cardiovascular diseases, in a specialized heart hospital in tehran. methods: the study design was cross-sectional. patients admitt...

Accidental hypothermia is associated with increased risk for arrhythmias. QRS/QTc proposed as an ECG-marker, where decreasing values predict hypothermia-induced ventricular If reliable it should also nonappearance of arrhythmias, observed in species like rat that regularly tolerate prolonged hypothermia. A model designed studying cardiovascular function during cooling, and subsequent rewarming ...

The development of ventricular arrhythmias is often a consequence of the interaction between structural abnormalities of the heart and transient disturbances in the electrophysiologic milieu. The critically ill patient is particularly susceptible to arrhythmias given the metabolic, ischemic, and neurohormonal stressors present in the intensive care unit. The significance of ventricular arrhythm...

Management strategies for ventricular arrhythmias are guided by the risk of sudden death and severity of symptoms. Patients with a substantial risk of sudden death usually need an implantable cardioverter defibrillator (ICD). Although ICDs effectively end most episodes of ventricular tachycardia or ventricular fibrillation and decrease mortality in specific populations of patients, they have in...