Mitral Valve Prolapse, Arrhythmias and Mitral Valve Surgery

Study Overview
=================
Brief Summary
-----------------
Mitral valve prolapse (MVP) is associated with malignant ventricular arrhythmias (VA) and sudden cardiac death. A proper electrophysiological and echocardiographic characterization of this population is missing. Moreover, the effects of mitral valve repair on the arrhythmic burden are still matter of debate. The investigators sought to explore the role of the arrhythmic substrate in the risk stratification of patients with MVP and to assess whether mitral surgery is followed by a significant modification of the baseline arrhythmic pattern.

Detailed Description
-----------------
This is a prospective observational study, enrolling 200 patients with MVP and any documented VA. Diagnosis of VA obtained by 12 leads ECG and Holter recordings will be reported, as well as preprocedural premature ventricular contractions (PVC) burden assessed by 24-hour Holter monitoring; demographic and clinical data will be collected, including symptoms, documentation of VA and atrial fibrillation (AF). Echocardiography data will be analyzed, focusing on mitral regurgitation grading and mitral valve morphology analysis, assessment of leaflet redundancy and prolapse, chordal elongation, annular dilatation, presence of calcifications and mitral annular disjunction characterization. Patients will undergo ECG Holter monitoring before Cardiac Surgery with the aim to identify any VA and estimate PVC burden. ECG Holter monitoring will be repeated at 3, 9, and 12 months after cardiac surgery. In case of intraoperative biopsy, the result of histopathological examination will be collected. For patients undergoing cardiac imaging, including Cardiac Magnetic Resonance or Computer Tomography, data regarding cardiac volumes, function, markers of fibrosis will be collected. In patients undergoing Programmed electrical stimulation (PES) and Electroanatomical Mapping (EAM), size of bipolar and unipolar endocardial abnormal voltage areas, Late Potentials (LP) area, results of programmed electrical stimulation, will be evaluated.

Official Title
-----------------
Electrophysiological Substrate in Patients With Barlow's Disease: Clinical Predictors of Arrhythmic Events and Impact of Mitral Surgery

Conditions
-----------------
Mitral Valve Prolapse, Cardiac Arrhythmia

Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Adult 18 years of age or older, at the time of inclusion; Hospitalized or presented in outpatient visit; And presented with: • Diagnosis of MVP Who underwent electrophysiological evaluation or cardiac surgery for mitral valve disease. Exclusion Criteria: Patients not willing to participate to the study Patients without clinical evaluation of the arrhythmic profile.

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------
What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Presence of significant arrhythmic burden in MVP patients |  | At enrollment | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Disappearance of significant arrhythmic burden after mitral valve surgery |  | 3, 9, 12 months after mitral valve surgery | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Sudden Cardiac Death, Premature Ventricular Contraction, Mitral valve surgery