Totally endoscopic aortic valve replacement: technique and first experience

Abstract

Abstract Background Cardiac surgery is still looking for new minimally invasive techniques with less trauma and better cosmetic results. In the field of aortic valve replacement, several types of less invasive procedures were introduced, allowing a reduction in blood loss, infections, ventilation times, morbidity and mortality. The most common technique for minimally invasive aortic valve replacement is the mini-sternotomy approach. In this report, the initial experience with a non-sternotomy approach for aortic valve replacement by means of a totally endoscopic surgical technique is presented. Methods The totally endoscopic aortic valve replacement was carried out in 201 patients (59,7% males, mean age: 71.6±11.7 years) from October 2017 until October 2019. Severe aortic valve stenosis was the surgical indication for all patients, who had a mean EuroSCORE II of 2.35±3.82. The surgery was carried out with the patient in supine position and a standard zero-degree optics was used. A 20 mm working port in the 2nd right intercostal space and two 5 mm trocars gained access to the aorta. After groin cannulation, cardiopulmonary bypass was initiated. Transthoracic aortic cross-clamping followed by antegrade administration of a single shot cold mixed-blood cardioplegia was assessed. The aortotomy was followed by the excision of the stenotic aortic valve and the aortic valve prosthesis was implanted in supra-annular position. After the closure of the aorta, an external pacemaker wire was placed. Results Mean cross-clamp and cardiopulmonary bypass times were 62±14 and 94±25 minutes, respectively. No conversion to a sternotomy was needed. The mean length of stay at the intensive care unit was 69.4±149.6 hours while patients spend 9.6±10 days at the hospital. Due to our new fast track protocol, the mean hospital stay in the last two months was 6.1 days (26 patients, 12.9%). The average postoperative blood loss (24h) was 251±298 mL and the patients were ventilated for 6.9±9 hours. In 10 patients (4.9%), re-exploration in an endoscopic way was needed. None of them had a surgical bleeding focus. No paravalvular leakages were detected at discharge. 69 patients (34.7%) developed atrial fibrillation after surgery. In addition, 10 patients (4.9%) underwent a pacemaker implantation postoperatively whereas 4 patients (1.9%) suffered from a CVA. Finally, the 30-day mortality was 2.0%. Conclusion These results concerning the feasibility and safety of totally endoscopic aortic valve replacement are promising. The aortic cross clamping times are acceptable, and the morbidity and mortality rates are low. Long term results are needed to confirm these initial findings. Funding Acknowledgement Type of funding source: Private hospital(s). Main funding source(s): Jessa Hospital