نتایج جستجو برای: paroxysmal supraventricular tachycardia psvt

تعداد نتایج: 37049  

Journal: :Circulation 1977
F Amat-y-Leon C Wyndham D Wu P Denes R C Dhingra K M Rosen

Electrophysiological studies in one patient with type B pre-excitation and dual A-V nodal pathway revealed several types of paroxysmal narrow QRS tachycardia (PSVT). One type of PSVT reflected antegrade fast A-V nodal pathway and retrograde anomalous pathway conduction. This PSVT was characterized by early retorgrade activation of right atrial appendage, P following QRS and cycle length of 290 ...

2017
Hyejin Shi Sungmin Sohn SungHo Wang Sungrock Park SangKi Lee Song Yi Kim Sun Young Jeong Changhwan Kim

Congenital cardiovascular anomalies, such as dextrocardia, persistent left superior vena cava (SVC), and pulmonary artery (PA) sling, are rare disorders. These congenital anomalies can occur alone, or coincide with other congenital malformations. In the majority of cases, congenital anomalies are detected early in life by certain signs and symptoms. A 56-year-old man with no previous medical hi...

Journal: :British heart journal 1970
R Rokseth L Hatle D Gedde-Dahl P O Foss

Pacemakers were implanted in 10 of 14 patients with dizziness and syncopal episodes of long duration, due to sino-atrial block. Paroxysmal supraventricular tachycardia, notably atrial fibrillation, had occurred in 6 patients. Medical treatment was unsatisfactory in 3 of these and pacemaker therapy was given. This abolished both syncope and paroxysmal tachycardia. Sinoatrial block and supraventr...

Journal: :Circulation 1973
P Denes D Wu R C Dhingra R Chuquimia K M Rosen

Electrophysiological evidence suggestive of dual atrioventricular (A-V) nodal pathways is presented in two patients with normal P-R interval and reentrant paroxysmal supraventricular tachycardia (PSVT). His bundle recordings and atrial stimulation were used to obtain this electrophysiological evidence. Refractory periods were measured with the atrial extra-stimulus technique. Plotting of H,-H2 ...

Journal: :Circulation 1977
D Wu P Denes F Amat-Y-Leon C R Wyndham R Dhingra K M Rosen

Three patients with paroxysmal supraventricular tachycardia (PSVT) had discontinuous ventriculo-artrial conduction curves (V1-V2, A1-A2), suggesting dual A-V nodal pathways. Ventricular echoes occurred simultaneously with sudden increase of V-A interval. These echoes were characterized by retrograde P waves occurring in front of QRS, suggesting utilization of a slow pathway for retrograde condu...

Journal: :Circulation 1975
D Wu P Denes C Wyndham F Amat-y-Leon R C Dhingra K M Rosen

In patients with atrioventricular (A-V) nodal re-entrant paroxysmal supraventricular tachycardia (PSVT), atrial extrastimulus technique frequently reveals discontinuous A1-A2, H1-H2 curves suggestive of dual A-V nodal pathways. To further test the hypothesis that these curves in fact reflect dual A-V nodal pathways, a ventricular extrastimulus (VS) was coupled either to A2 at a fixed A1-A2 inte...

Journal: :European heart journal 2004
Piercarlo Ballo Daniele Bernabò Sergio Antonio Faraguti

AIMS To analyse whether heart rate may affect the efficacy of adenosine, verapamil and carotid sinus massage in terminating symptomatic episodes of paroxysmal supraventricular tachycardia (PSVT) in adults. METHODS AND RESULTS The study population was selected among 175 adult patients, affected by symptomatic PSVT. One hundred and six of them were considered eligible for the study. Each subjec...

Journal: :British heart journal 1983
K K Sethi S Jaishankar M Khalilullah M P Gupta

Electrophysiological effects of 2 to 2.5 mg/kg iv disopyramide were studied in 10 patients with dual nodal pathways who used a slow pathway for anterograde and a fast pathway for retrograde conduction during paroxysmal supraventricular tachycardia (mean cycle length 308.5 +/- 37 ms; range 260-370 ms). Disopyramide terminated the tachycardia in six cases by production of ventriculoatrial block i...

Journal: :Circulation 2005
Kenneth A Ellenbogen Gearoid O'Neill Eric N Prystowsky John A Camm Lixin Meng Hsiao Dee Lieu Markus Jerling Revati Shreeniwas Luiz Belardinelli Andrew A Wolff

BACKGROUND Tecadenoson is a potent selective A1-adenosine receptor agonist with a dose-dependent negative dromotropic effect on the AV node. Tecadenoson terminates induced paroxysmal supraventricular tachycardia (PSVT) without the clinically significant side effects caused by stimulation of other adenosine receptors. This trial was designed to determine a safe and effective tecadenoson bolus fo...

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