[Autonomic status and neurohumoral regulation in patients with refractory tachyarrhythmia].

Results are submitted of vegetative testing as well as of studying the 24.h excretion of catecholamines, activity of cholinesterase, the levels of thyroxin, triiodothyronine and hydrocortisone in blood plasma of 120 patients with tachyarrhythmias that do not respond to antiarrhythmic drug preparations. The functional state of the vegetative nervous system in the attack-free period in the above patients was mostly determined by hyperfunction of its sympathetic subdivision in the presence of inadequate vegetative reactivity, frequently excessive, occasionally weakened, and instability of adrenergic and cholinergic influences.

[Surgical treatment of supraventricular tachycardias in children].

The paper deals with the results of surgical treatment in 19 children with supraventricular tachycardias. Eighteen patients were found to have the Wolff-Parkinson-White syndrome and one presented with ectopic right atrial tachycardia. The accessory pathways in the free wall and anterior septum in the presence of the Wolff-Parkinson-White syndrome were eliminated on the working heart, whereas those in the posterior septum were removed during extracorporeal circulation via endocardial access.

[Surgical treatment of supraventricular tachycardia].

Surgical treatment of supraventricular tachycardia was performed in 61 patient, including the 52--with additional atrio-ventricular connections. Arrhythmia was liquidated in 57 (93.4%) patients.