Safety and Efficacy Study of a New Device for Making Neochordae in Mitral Valve Repair
Mitral prolapse is a common cardiac disease whose patients are at higher risk for serious complications. Mitral valve (MV) repair offers several important advantages compared with valve replacement and it achieves excellent midterm and long-term results. Two major problems of using pre-measured expanded polytetrafluoroethylene(ePTFE) neochordae (the loop technique) are deciding the length of the neochordae and tying the knot at the intended length. Therefore, a great need still exists to find new method to simplify and precise the length of neochordae. 20 patients with mitral valve prolapse who undergo mitral valve repair using neochorda will be recruited in this study. Trans thoracic echocardiography (TTE) will be done preoperatively for all patients. Two, three, and four chamber view of each patient will be pre-operatively recorded. The device will be set with extracted measurements. Artificial corda loops are made using CV-4 ePTFE sutures. After artificial chordae replacement, the ring annuloplasty will be done. Follow up: A leakage test after attaching the 1st loop; Post operative trans esophageal echocardiography (TEE) and determining the severity of mitral regurgitation [Wall motion Score Index (WMSI), Mitral Annulus Area (MAA), LVEF, End Systolic Volume (ESV), End Diastolic Volume (EDV), Iso-Volemic Relaxation Time (IVRT), (IVRT/(QE-QE^') ,Chamber Relaxation velocity)/(Myocard relaxation velocity(E/E^' ), HR]; TEE 3 months after discharge; Cross clamp time; Intubation period in ICU.
|Study Design:||Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Double Blind (Subject, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||Phase II Study of Using a New Device (Neochordameter) in Making Artificial Chordae for Mitral Valve Repair|
- Mortality [ Time Frame: Early (within 30 days after surgery), Late (After 12 months) ] [ Designated as safety issue: Yes ]
- Mitral Valve prolapse measurement after using neochordae [ Time Frame: Intra-operation, 3, 6, and 12 months after surgery ] [ Designated as safety issue: No ]
- Cardiopulmonary bypass time [ Time Frame: During Surgery ] [ Designated as safety issue: Yes ]
|Study Start Date:||August 2012|
|Estimated Study Completion Date:||August 2014|
|Estimated Primary Completion Date:||August 2013 (Final data collection date for primary outcome measure)|
Experimental: Experimental: premeasured Neochordae
Transthoracic echocardiography(TTE) is done for all patients. The new device will be setup using the TTE measurements.The artificial Chordae loops will be made at the operation room before starting the surgery. These loops will be attached to the respective papillary muscle's head and the free edge of respective prolapsed scallop.
|Device: Artificial Chordae|