Data collection
Follow-up data were collected at our centre’s outpatient
clinic. The follow-up rate was 92% for the MBP group and 95%
for the MMP group. Doctors and nurses in our research team did their
best to reduce the number of patients lost to follow-up by
maintaining telephone contact with the participants or their
relatives at regular intervals or by using the National data death
registration database through the participants’ unique national ID
for those who could not be contacted after multiple efforts.
For all patients, we collected basic preoperative sociodemographic and
clinical data [age, body mass index, socioeconomic status, New York
Heart Association (NYHA) classification, previous cardiological
interventions, cardiovascular risk factors, comorbidities, European
System for Cardiac Operative Risk Evaluation (EuroScore),
echocardiography], and laboratory data. We also recorded
the patients’ preoperative and postoperative
echocardiographic data, including ejection fraction, left ventricular
end diastolic diameter (mm), left ventricular end systolic
diameter (mm), left atrium (mm), right atrium (mm), mitral opening
(mm), and mitral valve pathologies; intra-operative transesophageal
echocardiography (TEE) data, as well as TTE data at one week
post-operation and
upon clinical follow-up[9,10];relevant medical or surgical history; operative variables [surgical approach (conventional or
minimally invasive), cross clamp time, bypass time, type and size of
mitral prostheses, concomitant AF ablation, and tricuspid
procedures]; and postoperative variables [ventilation
time, intensive care unit (ICU) stay, hospital stay, pleural
effusion, pericardial tamponade, wound
infection,arrhythmia (atrio-ventricular (A-V) block–AF],pneumothorax, pneumonia, stroke, acute
renal failure(ARF), temporary dialysis, neurological
complication, pacemaker implantation, 30-day and 10-year cardiac and
non-cardiac death].