METHOD FOR PREDICTION OF DEVELOPING ATRIAL FIBRILLATION AFTER ISOLATED CORRECTION OF MITRAL VALVE DEFECT IN PATIENTS WITH SINUS RHYTHM IN REMOTE PERIOD Russian patent published in 2024 - IPC A61B8/00 

FIELD: medicine; cardiosurgery.

SUBSTANCE: development of atrial fibrillation is predicted after isolated correction of mitral valve defect in patients with sinus rhythm in remote period. Indicators are determined: presence or absence of atrial flutter, indexed end-systolic size of the left ventricle, the size of the right atrium and the need for temporary pacing are determined. In this method, the sizes of the right atrium and the indexed end-systolic size of the left ventricle are taken into account in patients with mitral valve defects with an initial sinus rhythm, as well as the presence of preoperative atrial flutter and the postoperative need for temporary pacing, based on the indicators of which a model for predicting the development of atrial fibrillation after the isolated correction of the mitral valve defect is derived, wherein the probability is calculated by the original formula, where h_i(t) is the predicted risk of developing AF for the i-th patient, %; h₀(t) is the basic risk of developing AF for a certain time period t, %; A—presence of atrial flutter, 0—absence of atrial flutter, 1—presence of atrial flutter, B—indexed end-systolic size of left ventricle, cm, divided by body surface area, m², C is the right atrium size, cm, D is the need for temporary pacing in the early postoperative period, 0—no pacing was performed, 1—pacing was performed, while probability of developing AF is determined as high, if P>0.8, and at P<0.8 probability is defined as low.

EFFECT: method provides higher efficiency of preoperative screening of patients with high risk of atrial fibrillation aimed at isolated correction of mitral valve defect with initial sinus rhythm.

1 cl, 7 ex