[Surgical treatment of supraventricular tachyarrhythmias using laser].

Much importance is attached lately to the use of lasers in surgical treatment of tachyarrhythmias. The advantages of the laser radiation are as follows: the possibility of using it on a contracting heart, its exact and selective effect, infliction of even damages in preservation of the structure, reduction of damage to the myocardium as a whole. At the Bakulev Institute of Cardiovascular Surgery, USSR AMS, 52 operations were carried out in the management of supraventricular tachyarrhythmias by laser radiation: 27 operations for laser isolation of the atrioventricular node, 15 operations for laser isolation of the atria and bases of the pulmonary veins (11 in combination with laser isolation of the atrioventricular node), 3 operations for ablation of ectopic foci in the atria and ventricles, 4 operations for ablation of the bundle of His, and 3 operations for removal of Maheim's nodoventricular tract.

[Non-invasive topical ECG diagnosis of Wolff-Parkinson-White syndrome].

The paper deals with the procedures and techniques of the non-invasive topical ECG diagnosis of the Wolff-Parkinson-White syndrome, which were based on the regression analysis. Based on the analysis of ECG data and the results of intraoperative cardiac mapping in 64 patients operated on for the Wolff-Parkinson-White syndrome, a linear regression model was developed, which precisely localizes the site of the Kent bundle from the measurements of delta-wave amplitude and polarity in 12 standard leads. The site of the Kent bundle was determined by 30 zones of the atrioventricular sulcus.

[Surgical treatment of ventricular allorhythmia and non-ischemic tachycardia].

The paper deals with the problems in the diagnosis and treatment of patients with the most malignant rhythm disturbances, i. e. ventricular arrhythmias.