Surgical Aortic Valve Replacement in Patients Above the Guideline-endorsed Age Cut-off: Reasons for Surgery and Clinical Outcomes

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Objectives: The 2017 and 2021 ESC/EACTS guidelines for the management of valvular heart disease recommend transcatheter aortic valve implantation (TAVI) as a treatment option for severe symptomatic aortic valve stenosis (AS) in patients ≥75 years of age. However, surgical aortic valve replacement (SAVR) remains a viable option for elderly patients, particularly in specific anatomical or clinical subsets. The objective of this study was to analyze indications for SAVR and postoperative outcomes in patients ≥75 years of age. Methods: Heart team protocols were reviewed to determine indications for SAVR. The adjudication of acute procedural and early clinical outcomes was conducted in accordance with the standardized VARC-3 definitions. Furthermore, cardiovascular mortality and rate of aortic valve re-intervention were assessed at latest follow-up with a median duration of 5.5 years (1.9-7.1 years). Results: A total of 43 patients ≥75 years of age (51% male) underwent isolated SAVR at our center between 2017 and 2022. STS/EuroSCORE II was 1.7 ± 0.6%/1.7 ± 0.4%. The age distribution of patients was as follows: 75 to 76 years in 32.5% (14/43), 77 to 79 years in 46.5% (20/43), and 80 to 83 years in 21% (9/43) of patients. Indications for SAVR included low operative risk according to STS (1.6 ± 0.3%) and EuroSCORE II (1.4 ± 0.3%) in 51.2% (22/43), unicuspid/bicuspid aortic valve in 21% (9/43), patient preference in 13.9% (6/43), large aortic annulus in 9.3% (4/43), and massive calcification of the left ventricular outflow tract in 4.6% (2/43) of patients. Mean aortic cross clamp and cardiopulmonary bypass times were 67.1 ± 18.2 minutes and 98.6 ± 25.1 minutes. All-cause 30-day mortality was 0% (0/43). Technical success, device success, and early safety were 100% (43/43), 100% (43/43), and 81.4% (35/43). Bleeding complications and the need for permanent pacemaker implantation (PPM) were observed in 9.3% (4/43) and 4.6% (2/43) of patients. Mean ICU and hospital stay were 2.9 ± 2.1 days and 12.5 ± 3.6 days. Post-procedural echocardiography demonstrated absence of paravalvular leakage (PVL) in all but one patient, who exhibited moderate PVL. The mean transvalvular pressure gradient was 11.4 ± 4.5 mmHg. Latest follow-up was at median 5.5 years (1.9-7.1 years). Aortic valve re-intervention at follow-up was 2.3% (1/43) and cardiovascular mortality was 4.6% (2/43). Conclusion: In the current era, SAVR is rarely performed in patients ≥75 years of age. Despite the highly selective nature of the patient cohort studied, the results are excellent, with a 30-day mortality of 0% and a low cardiovascular mortality at 5 years. SAVR should still be considered a valid option in elderly patients, evaluated by a heart team, which considers each patient's unique clinical, anatomic, and procedural characteristics.

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