Study population
We retrospectively analyzed the data obtained from 121 consecutive patients, who visited our echocardiography department between October 2019 and August 2020 for TOE examination. 67 patients were males (55.7%), while 54 were females (44.3%), aged 64±13 years. All patients underwent TTE and TOE evaluation during the same visit and all data were stored and analyzed by two cardiologists experienced on echocardiography (KP and II). The only exclusion criterion for this study was previous history of surgical or transcatheter MV repair or replacement. A written informed consent form was obtained from all participants and the protocol was approved by the local ethics committee.