Left Ventricular Reverse Remodeling Evaluation After Surgical Correction of Aortic Regurgitation

Inclusion Criteria: * Age over 18 years * Planned primary elective surgery for chronic aortic regurgitation * Presence of functional mitral regurgitation * End-diastolic volume of the left ventricle \>= 250 ml Exclusion Criteria: * Infectious endocarditis * History of myocardial infarction * Indications on simultaneous myocardial revascularisation * Acute aortic regurgitation of any etiology * Previously diagnosed dilatation of the left ventricle, not associated with the development of aortic regurgitation * Long-term persistent or permanent form of atrial fibrillation * Pregnancy in the first 12 months after surgery * Simultaneous participation in other studies * Presence of implanted pacemakers * Refusal to sign informed consent * Acute coronary event diagnosed within 12 months after aortic valve surgery * Indications for resynchronization therapy or permanent right ventricular pacing in the first 12 months after aortic valve surgery * Re-do cardiac surgery for any reason within 12 months after aortic valve surgery