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J Thorac Cardiovasc Surg 2005;129:1395-1404
© 2005 The American Association for Thoracic Surgery

Cardiopulmonary Support and Physiology

Robotic mitral valve surgery: A United States multicenter trial

^a Brody School of Medicine at East Carolina University, Pitt County Memorial Hospital, Greenville, NC
^b Advocate Christ Medical Center, Oak Lawn, Ill
^c Columbia Presbyterian Hospital, New York, NY
^d University of Southern California, Los Angeles, Calif
^e Hoag Heart and Vascular Institute, Hoag Memorial Hospital, Newport Beach, Calif

Received for publication May 1, 2003; revisions received June 21, 2004; accepted for publication July 9, 2004.

^_* Address for reprints: L. Wiley Nifong, MD, Department of Surgery, East Carolina University School of Medicine, 600 Moye Blvd, LSB 248, Greenville, NC 27858 (Email: nifongL{at}mail.ecu.edu).

OBJECTIVE: In a prospective phase II Food and Drug Administration trial, robotic mitral valve repairs were performed in 112 patients at 10 centers by using the da Vinci surgical system. The safety of performing valve repairs with computerized telemanipulation was studied.

METHODS: After institutional review board approval, informed consent was obtained. Patients had moderate to severe mitral regurgitation. Operative technique included peripheral cardiopulmonary bypass, a 4- to 5-cm right minithoracotomy, a transthoracic aortic crossclamp, and antegrade cardioplegia. The successful study end point was grade 0 or 1 mitral regurgitation by transthoracic echocardiography at 1 month after surgery.

RESULTS: Valve repairs included quadrangular resections, sliding plasties, edge-to-edge approximations, and both chordal transfers and replacements. The average age was 56.4 ± 0.09 years (mean ± SEM). There were 77 (68.8%) men and 35 (31.2%) women. Valve pathology was myxomatous degeneration in 105 (91.1%), and 103 (92.0%) had type II leaflet prolapse. Leaflet repair times averaged 36.7 ± 0.2 minutes, with annuloplasty times of 39.6 ± 0.1 minutes. Total robot, aortic crossclamp, and cardiopulmonary bypass times were 77.9 ± 0.3 minutes, 2.1 ± 0.1 hours, and 2.8 ± 0.1 hours, respectively. On 1-month transthoracic echocardiography, 9 (8.0%) had grade 2 mitral regurgitation, and 6 (5.4%) of these had reoperations (5 replacements and 1 repair). There were no deaths, strokes, or device-related complications.

CONCLUSIONS: Multiple surgical teams performed robotic mitral valve repairs safely early in development of this procedure, with a reoperation rate of 5.4%. Advancements in robotic design and adjunctive technologies may help in the evolution of this minimally invasive technique by decreasing operative times.

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