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 premeasured polytetrafluoroethylene (PTFE) 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 prolaps 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 preoperatively recorded with trans thoracic echocardiography (TTE). The device will be set with extracted measurements. Artificial corda loops are made using CV-5 of ePTFE sutures. After artificial chordae replacement, the ring annuluplasty 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), MRSV, MAA, LVEF, ESV, EDV, Iso Volumic Relaxation Time (IVRT), (IVRT/(QE-QE^' ) , (Chamber Relaxation velocity)/(Myocard relaxation velocity) (E/E^' ) ), HR); TEE 3 months after discharge; CBT time; Intubation period in ICU.