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10 résultats
Regional myocardial ajmaline concentration and antiarrhythmic activity for ischaemia- and reperfusion-induced arrhythmias in rats.
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1. Antiarrhythmic actions of ajmaline against ischaemia (left coronary artery occlusion for 15 min) and subsequent reperfusion-induced arrhythmias were investigated in anaesthetized rats. 2. Ajmaline (2 mg kg-1, i.v.) was effective in suppressing ischaemia-induced arrhythmias whether given pre- or
[Severe hyposystole due to ajmaline in acute myocardial ischemia].
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Unusual response to the ajmaline test in a patient with Brugada syndrome.
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We present a Brugada syndrome patient who suffered an aborted sudden death. The ajmaline test (1 mg/kg body weight) induced accentuated alternans ST-segment elevation in V1-V2 without ventricular arrhythmias. It could represent silent ischaemia not detected before, failure of myocardial regions to
[Effect of the class IA anti-arrhythmic agents ajmaline on end-systolic pressure-volume relations (conductance technique)].
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To evaluate cardiodepressive risks of antiarrhythmic treatment with ajmaline, we monitored, in addition to conventional hemodynamic parameters, end systolic pressure-volume relations (ESPVR) to assess potential negative inotropic effects. Twelve patients (CAD without ischemia; EF = 60 +/- 3%)
Cardiovascular effects of ajmaline.
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Ajmaline, a rauwolfia derivative, has been found to possess potent antiarrhythmic effects. The present study has been designed to define the cardiovascular effects of this drug. Hemodynamic studies performed in anesthetized and conscious dogs demonstrated no significant changes in measured
A case of anomalous origin of the right coronary artery from the left sinus of Valsalva exhibiting the Wolff-Parkinson-White syndrome.
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A 56-year-old male with the Wolff-Parkinson-White syndrome was suspected of having suffered a myocardial infarction following attacks of chest pain. Serial measurements of serum creatine phosphokinase and the electrocardiographic findings after ajmaline loading virtually excluded the possibility of
[Brugada syndrome].
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Brugada syndrome is believed to be responsible for 4 to 12% of all sudden deaths and for 20% of deaths in patients with structurally normal hearts. As a distinct clinical entity with a high risk of sudden cardiac death it was first described in 1992. The syndrome characterized by ST segment
[Chagasic myocardiopathy: historical perspective].
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Considerable advances in the clinical pathological and pathogenic aspects of Chagas disease have been made since the Brazilian physician Carlos Chagas described the disease in 1909. The disease caused by the flagellate protozoon parasite Trypanosoma cruzi is transmitted to humans by a blood sucking
Paradoxical effect of isoprenaline infusion.
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BACKGROUND
Isoprenaline (isoproterenol) is a beta-adrenergic drug, used to increase the heart rate and, during electrophysiological study, to facilitate the induction of supraventricular (SVT) and ventricular tachycardias (VT). Decrease in heart rate during isoprenaline infusion is a rare
Supraventricular tachyarrhythmia as a cause of sudden cardiac arrest.
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BACKGROUND
Supraventricular tachyarrhythmias (SVTA) are an accepted cause of cardiac arrest in patients with Wolff-Parkinson-White syndrome (WPW) and hypertrophic cardiomyopathy but their participation in other conditions is less well understood. The purpose of the study was to examine the role of
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