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. 2018 Nov 1;54(5):853-859.
doi: 10.1093/ejcts/ezy134.

Robotic mitral valve replacements with bioprosthetic valves in 52 patients: experience from a tertiary referral hospital

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Robotic mitral valve replacements with bioprosthetic valves in 52 patients: experience from a tertiary referral hospital

Chia-Cheng Kuo et al. Eur J Cardiothorac Surg. .

Erratum in

Abstract

Objectives: Robotic mitral valve replacement (MVR) emerged in the late 1990s as an alternative approach to conventional sternotomy. With the increased use of bioprosthetic valves worldwide and strong patient desire for minimally invasive procedures, the safety and feasibility of robotic MVRs with bioprosthetic valves require investigation.

Methods: Between January 2013 and May 2017, 52 consecutive patients underwent robotic MVRs using the da Vinci Si surgical system (Intuitive Surgical Inc., Sunnyvale, CA, USA). Their mean age was 55.1 ± 13.8 years, and mean EuroSCORE II was 2.25% ± 1.25%. Among the enrolled patients, 32 (61.5%) patients presented with preoperative atrial fibrillation, 6 (11.5%) patients had experienced embolic stroke and 5 (9.6%) patients had undergone previous cardiac surgery. The operations were performed using cardiopulmonary bypass (CPB) under an arrested heart status.

Results: Five porcine valves and 47 bovine valves were implanted. A total of 38 (73.1%) patients received concomitant cardiac procedures, including 26 Cox-maze IV procedures, 12 tricuspid valve repairs and 5 atrial septal defect repairs. The mean aortic cross-clamp and CPB times were 141.3 ± 34.3 min and 217.1 ± 42.0 min, respectively. There was no operative mortality. During the mean follow-up of 29 ± 15 months, no prosthesis degeneration was noted. The average left atrial dimension exhibited a significant decrease from 51.4 ± 11.5 mm to 42.6 ± 10.1 mm.

Conclusions: Robotic MVR with bioprosthetic valves is safe, feasible and reproducible. Mid-term results are encouraging. Both aortic cross-clamp and CPB times can be improved with experience.

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Figures

Figure 1:
Figure 1:
External view. (A) A set-up for robotic mitral valve replacement, including robot arm ports and rib retractor for working port. (B) Mitral prosthesis deployment through a rib retractor.
Figure 2:
Figure 2:
An intracavitary pacing wire is fixed into the left ventricular endocardium and placed between the annulus and suture ring of the prosthesis.
Figure 3:
Figure 3:
Exponential regression curve for changes in (A) aortic cross-clamp time and (B) cardiopulmonary bypass time according to the chronological data for robotic MVRs. Aortic cross-clamp time: y (min) = 210.14x−0.142; r2 = 0.297; P <0.001 and cardiopulmonary bypass time: y (min) = 320.6x−0.136; r2 = 0.417; P <0.001. MVR: mitral valve replacement.

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