METHOD AND DEVICE FOR INTERRUPTING EXCITATION WAVE FRONT PROPAGATION THROUGH AURICLES DURING SURGICAL INTERVENTION ON DRY HEART Russian patent published in 2002 - IPC

FIELD: medicine; medical engineering. SUBSTANCE: method involves carrying out radio frequency destruction on the epicardium side using double lines arranged in parallel. The left auricle having large size, the radio frequency destruction is carried out through a line beginning at posteromedial commissure of the mitral valve and ending near the anterolateral commissure of the mitral valve. The destruction line is conducted in parallel to interatrial septum. The left and right auricle having large size, right atriotomy is carried out beginning from the left auricula atrii base along its lateral wall and ending at the posterior interatrial torus. The incision is continued with the radio frequency destruction line in epicardial way to the coronary sinus apertura and to fibrous ring of the tricuspid valve. Destruction is carried out in endocardial way on the opposite side from the apertura of the vena cava to the superior edge of the interatrial septum towards the oval fossa base. After performing left atriotomy, the incision is conducted in epicardial way along the posterior interatrial sulcus beginning from the inferior angle of left atrium incision and then, it is continued in turning round the left pulmonary vein apertura from the outside outwards the left auricula atrii base that is to be separated and the line is continued from the base in epicardial way upwards by connecting it to earlier created destruction lines. The device has radio frequency oscillator, unit for controlling output voltage, output setter unit, current and voltage transducers. The working part has active and passive electrodes. The output setter unit is connected to the unit for controlling output voltage that is connected to the radio frequency oscillator through current and voltage transducers. Maximum output voltage derivative setter and differentiating unit are additionally introduced into the device structure. Resonance circuit is mounted at the oscillator output. EFFECT: enhanced effectiveness of treatment; reduced risk of complications. 6 cl, 6 dwg