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Premeasured Neochordae Loop Maker: A New Technology in Mitral Valve Repair

Ghavidel, Alireza Alizadeh MD*; Samiei, Niloofar MD*; Javadikasgari, Hoda MD*; Bashirpour, Kamiar BS

Innovations: Technology & Techniques in Cardiothoracic & Vascular Surgery: November/December 2013 - Volume 8 - Issue 6 - p 443–449
doi: 10.1097/IMI.0000000000000030
How-To-Do-It Article

Abstract: The exact length of neochordae loops plays the major role in the success of mitral valve repair. The Neochordae Loop Maker is a novel device that models the left ventricular structure in an individual patient. Preoperative transthoracic echocardiography is used to identify the geometry of each papillary muscle and set up the device for the patient. All required neochordae loops are made in the operating room before initiating the cardiopulmonary bypass. In the calibration phase, seven consecutive patients who were candidates for mitral valve replacement underwent transthoracic echocardiography. The device was set up for each patient, and the length of their normal chordae and their respective neochordae was compared by the Bland-Altman analysis. From seven excised mitral valves, 21 chordae were considered normal (gold standard). The length of these gold standards (1.92 ± 0.67 cm) and their respective neochordae (1.93 ± 0.69 cm) showed agreement by the Bland-Altman analysis. The proposed technology showed satisfactory preliminary results in creating the premeasured neochorda loops inasmuch as it reduced the complexity of minimally invasive surgeries.

From the *Heart Valve Disease Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran; and †Mechanical Engineering Department, Amirkabir University of Technology, Tehran, Iran.

Accepted for publication October 28, 2013.

Disclosure: The authors declare no conflicts of interest.

Address correspondence and reprint requests to Hoda Javadikasgari, MD, Heart Valve Disease Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Vali-Asr Ave., Niyayesh Blvd., Tehran 199691-1151, Iran. E-mail: Hoda.Javadi.K@gmail.com.

©2013 by the International Society for Minimally Invasive Cardiothoracic Surgery