Name: methods for ecg evaluation of indicators of cardiac risk, and susceptibility to aconitine-induced arrhythmias in rats following status epilepticus
Uploaded: 2011-04-05T13:00:00
Description: Watch this Scientific Journal Video about Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus at JoVE.com

وأيد هذا البحث من خلال منحة مقدمة من مواطنين المتحدة للبحوث في مجال الصرع (CURE) لSLB.

<p class="jove_title"&gt; 1. مواد بناء</p&gt;<ol&gt;<li&gt; هي التي شيدت لقسطرة الوريد الوداجي من قطعة (100 ملم) من أنابيب البولي اثيلين PE - 50 ، مشطوف في نهاية واحدة ، وملأت المياه المالحة ثم مع الهيبارين (50 U الهيبارين / المالحة مل).</li&gt;<liهي التي شيدت&gt; تسجيل تخطيط القلب وأقطاب من أطوال 100 ملم two من سلك معزول الفضية (30AWG). هي واحدة م?...

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جانبين من جوانب الإجراءات المذكورة هي ذات أهمية حاسمة. أولا ، يجب أن يكون معدل الادارة أكونيتين إلى القلب عبر ما يعادل الحيوانات. وهذا يتطلب وضع ثابت من النصائح الوريد الوداجي النسبية القسطرة إلى القلب ، والتكيف الحذر من معدل الحقن في الوريد. يجب أن يكون سعر التسليم أ...

methods for ecg evaluation of indicators of cardiac risk, and susceptibility to aconitine-induced arrhythmias in rats following status epilepticus

Lethal cardiac arrhythmias contribute to mortality in a number of pathological conditions. Several parameters obtained from a 
non-invasive, easily obtained electrocardiogram (ECG) are established, well-validated prognostic indicators of cardiac risk in patients suffering 
from a number of cardiomyopathies. Increased heart rate, decreased heart rate variability (HRV), and increased duration and variability of cardiac 
ventricular electrical activity (QT interval) are all indicative of enhanced cardiac risk 1-4. In animal models, it is valuable to compare 
these ECG-derived variables and susceptibility to experimentally induced arrhythmias. Intravenous infusion of the arrhythmogenic agent aconitine has
 been widely used to evaluate susceptibility to arrhythmias in a range of experimental conditions, including animal models of depression 5 and 
 hypertension 6, following exercise 7 and exposure to air pollutants 8, as well as determination of the antiarrhythmic efficacy of pharmacological 
 agents 9,10. 
It should be noted that QT dispersion in humans is a measure of QT interval variation across the full set of leads from a 
standard 12-lead ECG. Consequently, the measure of QT dispersion from the 2-lead ECG in the rat described in this protocol is different than that 
calculated from human ECG records. This represents a limitation in the translation of the data obtained from rodents to human clinical medicine.
Status epilepticus (SE) is a single seizure or series of continuously recurring seizures lasting more than 30 min 
11,12 11,12, and results in mortality in 20% of cases 13. Many individuals survive the SE, but die within 30 days 14,15.
 The mechanism(s) of this delayed mortality is not fully understood. It has been suggested that lethal ventricular arrhythmias contribute to many of these 
 deaths 14-17. In addition to SE, patients experiencing spontaneously recurring seizures, i.e. epilepsy, are at risk of premature 
 sudden and unexpected death associated with epilepsy (SUDEP) 18. As with SE, the precise mechanisms mediating SUDEP are not known. 
 It has been proposed that ventricular abnormalities and resulting arrhythmias make a significant contribution 18-22.
 To investigate the mechanisms of seizure-related cardiac death, and the efficacy of cardioprotective therapies, it is 
 necessary to obtain both ECG-derived indicators of risk and evaluate susceptibility to cardiac arrhythmias in animal models of seizure disorders 
 23-25. Here we describe methods for implanting ECG electrodes in the Sprague-Dawley laboratory rat (Rattus norvegicus), following SE,
 collection and analysis of ECG recordings, and induction of arrhythmias during iv infusion of aconitine.
 These procedures can be used to directly determine the relationships between ECG-derived measures of cardiac electrical 
 activity and susceptibility to ventricular arrhythmias in rat models of seizure disorders, or any pathology associated with increased risk of sudden 
 cardiac death.

Watch this Scientific Journal Video about Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus at JoVE.com

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

موصوفة تقنيات لقياس النشاط الكهربائي للقلب عن طريق الكهربائي (ECG) ، وتحليل عوامل الخطر على القلب وعدم انتظام ضربات القلب بعد التعرض لحالة صرعية (SE) في الفئران.

أساليب التقييم تخطيط القلب من مؤشرات الخطر على القلب ، والقابلية للأكونيتين عدم انتظام ضربات القلب التي يسببها في الفئران بعد حالة صرعية

Lethal cardiac arrhythmias contribute to mortality in a number of pathological conditions. Several parameters obtained from a 
non-invasive, easily ...

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