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J Am Coll Cardiol. 2014 Mar 11;63(9):914-9. doi: 10.1016/j.jacc.2013.07.090. Epub 2013 Sep 24.

Off-pump transapical implantation of artificial neo-chordae to correct mitral regurgitation: the TACT Trial (Transapical Artificial Chordae Tendinae) proof of concept.

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Department of Cardiac Surgery, Heartcentre Leipzig, Leipzig, Germany. Electronic address:
Clinic for Cardiac Surgery, University of Turin, Turin, Italy.
Department of Cardio-thoracic and Vascular Surgery, Aarhus University, Aarhus, Denmark.
Department of Cardiac Surgery, German Heart Centre, Munich, Germany.
Department of Cardiac Surgery, Kerckhoff Klinik, Bad Nauheim, Germany.
Department of Cardiac Surgery, St. Raffaelo Hospital, Milan, Italy.
Department of Cardiac Surgery, Heartcentre Leipzig, Leipzig, Germany.
Department of Cardiac Surgery, Vilnius University, Vilnius, Lithuania.



The goal of this study was to evaluate the safety and performance of the NeoChord DS1000 system (NeoChord, Inc., Minneapolis, Minnesota).


There is an increasing interest in transcatheter mitral valve (MV) treatment. The NeoChord DS 1000 system enables off-pump beating heart transapical MV repair with implantation of artificial neo-chordae.


Patients with severe mitral regurgitation (MR) due to isolated posterior prolapse were included in this TACT (Transapical Artificial Chordae Tendinae) trial. All patients were scheduled for off-pump transapical implantation of neo-chordae.


Thirty patients at 7 centers were enrolled. Major adverse events included 1 death due to post-cardiotomy syndrome and concomitant sepsis and 1 minor stroke with the patient fully recovered at the 30-day follow-up visit. Additional patients experienced procedural major adverse events related to a reoperation or conversion to standard of care. Acute procedural success (placement of at least 1 neo-chord and reduction of MR from 3+ or 4+ to ≤2+) was achieved in 26 patients (86.7%). In 4 patients neo-chordae were not placed for technical and/or patient-specific reasons. These patients underwent intraoperative (3 patients) or post-operative (1 patient) standard MV repair. At 30 days, 17 patients maintained an MR grade ≤2+. Four patients who developed recurrent MR were successfully treated with open MV repair during 30-day follow-up. Results improved with experience: durable reduction in MR to ≤2+ at 30 days was achieved in 5 (33.3%) of the first 15 patients and 12 (85.7%) of the last 14 patients.


Off-pump transapical implantation of artificial chordae to correct MR is technically safe and feasible; however, it yields further potential for improvement of efficacy and durability. (Safety and Performance Study of the NeoChord Device [TACT]; NCT01777815).


heart disease; mitral valve; surgery

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