نتایج جستجو برای: electrocardiographic study
تعداد نتایج: 3974783 فیلتر نتایج به سال:
Objective- The objective of the present study was to define electrocardiographic data following intranasal administration of diazepam, midazolam and xylazine with or without Ketamine in Chough. Design- To determine the heart effects of anesthetics in intranasal administration, an experimental in vivo study was employed. Animals- Ten healthy Choughs were examined in the current study...
BACKGROUND AND PURPOSE Carotid intima-media thickness and electrocardiographic left ventricular hypertrophy are 2 subclinical cardiovascular disease measures associated with increased risk of total and ischemic strokes. Increased intima-media thickness and electrocardiographic left ventricular hypertrophy also may reflect end-organ hypertensive effects. Information is scant on the associations ...
The potential of the new weighted-compressive sensing approach for efficient reconstruction of electrocardiograph (ECG) signals is investigated. This is motivated by the observation that ECG signals are hugely sparse in the frequency domain and the sparsity changes slowly over time. The underlying idea of this approach is to extract an estimated probability model for the signal of interest, and...
The effect of exercise on the QRS power spectrum has not been evaluated. We hypothesized that increased conduction velocity with exercise might selectively increase high-frequency QRS potentials. Using a digital electrocardiograph (ECG) cart, a single bipolar chest lead was recorded in 21 healthy adult males at rest and then immediately after treadmill exercise. Fast Fourier transform analysis ...
The value of exercise testing in detecting myocardial ischaemia resulting from coronary atheroma remains controversial. In order to increase the reliability of exercise testing, all its components (asymptomatic, haemodynamic, and electrocardiographic) have been scrutinised. In this study, concerned only with the electrocardiographic response to exercise, the incorporation of beta-blockade into ...
OBJECTIVES The goal of this study was to assess the relations of electrocardiographic QRS duration to left ventricular (LV) measurements in individuals without heart failure (HF) or prior myocardial infarction (MI). BACKGROUND Increased electrocardiographic QRS duration (>/=120 ms) is a marker of ventricular dyssynchrony. METHODS We evaluated the relations of maximal electrocardiographic QR...
Integration of genetics into a systems model of electrocardiographic traits using HumanCVD BeadChip.
BACKGROUND Electrocardiographic traits are important, substantially heritable determinants of risk of arrhythmias and sudden cardiac death. METHODS AND RESULTS In this study, 3 population-based cohorts (n=10,526) genotyped with the Illumina HumanCVD Beadchip and 4 quantitative electrocardiographic traits (PR interval, QRS axis, QRS duration, and QTc interval) were evaluated for single-nucleot...
BACKGROUND Many physicians believe that electrocardiographic characteristics of nonsustained ventricular tachycardia correlate with the risk for sudden death in survivors of myocardial infarction. Sustained ventricular tachycardia induced by programmed electrical stimulation has also been shown to predict sudden death. OBJECTIVE To determine whether electrocardiographic characteristics of spo...
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