Results 241 to 250 of about 38,214 (275)
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The American Journal of Cardiology, 2018
In a man with a wide-QRS complex tachycardia, a history of an inferior left ventricular scar, atrioventricular dissociation during the tachycardia, and a QRS morphology inconsistent with right or left bundle branch block exclude a diagnosis of supraventricular tachycardia with aberrant ventricular conduction due to bundle branch block or ventricular ...
Elias B. Hanna +2 more
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In a man with a wide-QRS complex tachycardia, a history of an inferior left ventricular scar, atrioventricular dissociation during the tachycardia, and a QRS morphology inconsistent with right or left bundle branch block exclude a diagnosis of supraventricular tachycardia with aberrant ventricular conduction due to bundle branch block or ventricular ...
Elias B. Hanna +2 more
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Hospital Practice, 1984
A 65-year-old man is seen in the emergency room for an episode of tachycardia that began 30 minutes ago. He had a myocardial infarction three years ago. Since then, he has had recurrent bouts of tachycardia diagnosed as ventricular tachycardia Treatment with quinidine, procainamide, disopyramide, and several beta-adrenergic blocking drugs was ...
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A 65-year-old man is seen in the emergency room for an episode of tachycardia that began 30 minutes ago. He had a myocardial infarction three years ago. Since then, he has had recurrent bouts of tachycardia diagnosed as ventricular tachycardia Treatment with quinidine, procainamide, disopyramide, and several beta-adrenergic blocking drugs was ...
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Narrow QRS Complex Tachycardias
AACN Advanced Critical Care, 2007Narrow QRS complex tachycardias are either atrioventricular (AV) nodal passive or AV nodal active. AV nodal passive tachycardias do not require the participation of the AV node in maintenance of the tachycardia. Examples are atrial tachycardia, atrial flutter, and atrial fibrillation.
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AACN Advanced Critical Care, 1992
Electrocardiographic monitoring for dysrhythmias is a major responsibility of critical care nurses, and patients with wide QRS complex tachycardias present a challenge. Criteria for differentiating the impulse origin as ventricular or supraventricular are well documented: QRS duration, QRS morphology, QRS axis, and presence of atrioventricular ...
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Electrocardiographic monitoring for dysrhythmias is a major responsibility of critical care nurses, and patients with wide QRS complex tachycardias present a challenge. Criteria for differentiating the impulse origin as ventricular or supraventricular are well documented: QRS duration, QRS morphology, QRS axis, and presence of atrioventricular ...
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1979
The principal deflection of the electrocardiogram is the QRS complex (Figure 3.1), and alterations in the QRS waves provide information of great clinical value.
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The principal deflection of the electrocardiogram is the QRS complex (Figure 3.1), and alterations in the QRS waves provide information of great clinical value.
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Estimation of QRS Complex Power Spectra for Design of a QRS Filter
IEEE Transactions on Biomedical Engineering, 1984We present power spectral analysis of ECG waveforms as well as isolated QRS complexes and episodes of noise and artifact. The power spectral analysis shows that the QRS complex could be separated from other interfering signals. A bandpass filter that maximizes the signal (QRS complex)-to-noise (T-waves, 60 Hz, EMG, etc.) ratio would be of use in many ...
N V, Thakor, J G, Webster, W J, Tompkins
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Influence of hemorrhage on the QRS complex of the electrocardiogram
American Heart Journal, 1971Abstract The removal of blood from anesthetized cats or dogs invariably produces an immediate reduction of the amplitude of the QRS complex, which can be restored to normal by reinjecting the blood. In the present study it was demonstrated that the QRS changes are directly related to the changes of the heart volume, viz., reduction of QRS amplitude ...
M, Manoach +4 more
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Annals of Internal Medicine, 1989
Excerpt To the Editor:The article on wide QRS-complex tachycardia by Akhtar and colleagues (1) is a welcome treatise on the electrocardiographic diagnosis of this complex and often enigmatic arrhyt...
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Excerpt To the Editor:The article on wide QRS-complex tachycardia by Akhtar and colleagues (1) is a welcome treatise on the electrocardiographic diagnosis of this complex and often enigmatic arrhyt...
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The QRS complex of the electrocardiogram
American Heart Journal, 1943The electrocardiogram is a photographic record of the differences in electrical potential existing between two points on the body surface at every instant during the time the record is being taken. On the ordinates of the record one reads the potential differences; on the abscissas the time is given.
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Detection of the QRS complex by linear prediction
Journal of Medical Engineering & Technology, 2006The electrocardiogram (ECG) represents the electrical activity of the heart. It is characterized by its recurrent or periodic behaviour with each beat. Each recurrence is composed of a wave sequence consisting of P, QRS and T-waves, where the most characteristic wave set is the QRS complex. In this paper, we have developed an algorithm for detection of
Z E, Hadj Slimane, F, Bereksi Reguig
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