atrial premature complexes/adenosina

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8 risultati

The effect of adenosine on impulse formation and propagation in the heart. Electrophysiologic studies and clinical implications.

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The effect of adenosine on impulse formation and conduction in the heart was studied in 20 dogs by the sinus node artery perfusion technique. Electrophysiologic studies were performed by using His electrograms and epicardial electrograms of the atria and left ventricle. This action potential was

[Terminating supraventricular tachycardia with adenosine--comparing the effectiveness of 12 mg and 18 mg].

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OBJECTIVE This study was done to answer the question if intravenous application of 18 mg adenosine is superior to 12 mg adenosine for the termination of supraventricular tachycardias. METHODS 31 patients (17 men, 14 women, mean age 53 +/- 15 years [range 15-76 years]) had electrophysiological tests.

Electrocardiographic profile of adenosine pharmacological stress testing.

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Adenosine stress testing in conjunction with radionuclide myocardial perfusion imaging has become a common approach for the detection of coronary artery diseases in patients who are unable to perform adequate levels of exercise. However, specific electrocardiographic alterations during the test have

Adenosine triphosphate-induced atrial fibrillation: the clinical significance and relevance to spontaneous atrial fibrillation.

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OBJECTIVE Adenosine triphosphate (ATP) frequently triggers atrial fibrillation (AF), but the clinical significance of this phenomenon is unknown. The purpose of this study was to reveal the relevance between spontaneous AF and ATP-induced AF. METHODS In 81 AF patients undergoing pulmonary vein

Antidromic tachycardia utilizing decremental, latent accessory atrioventricular fibers: differentiation from adenosine-sensitive ventricular tachycardia.

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OBJECTIVE We studied two patients with latent, decremental atrioventricular (AV) fibers in whom pre-excitation could be demonstrated only during wide complex tachycardia. BACKGROUND The presence of decremental AV fibers participating in antidromic AV reentrant tachycardia is usually suspected by the

Adenosine-induced atrial arrhythmia: a prospective analysis.

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BACKGROUND Adenosine is considered safe and effective for paroxysmal supraventricular tachycardia (PSVT), but anecdotal experience suggests that adenosine can precipitate atrial arrhythmias. OBJECTIVE To determine the frequency and mechanisms of adenosine-induced atrial arrhythmias. METHODS Clinical

Unusual Response to His-refractory atrial premature complex: what is the mechanism?

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A 32-year-old woman underwent radiofrequency catheter ablation of narrow QRS tachycardia (NQT) that was terminated with intravenous adenosine. Twelve-lead ECG was normal during sinus rhythm. The electrophysiological study showed normal AH and HV intervals during sinus rhythm. This article is

A reappraisal on lidocaine-sensitive repetitive, uniform atrial tachycardia.

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BACKGROUND Lidocaine sensitive, repetitive atrial tachycardia is an unusual arrhythmia whose electrophysiologic substrate remains undefined. We aimed to analyze the electropharmacologic characteristics of this arrhythmia with emphasis on its cellular substrate and response to drug

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