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Chinese Journal of Heart and Heart Rhythm(Electronic Edition) ›› 2023, Vol. 11 ›› Issue (02): 114-119. doi: 10.3877/cma.j.issn.2095-6568.2023.02.005

• Structural Heart Disease • Previous Articles     Next Articles

Chinese domestic transcatheter valve system in the treatment of severe aortic stenosis: analysis of long-term outcomes and predictors

Zilong Weng, Li Zhu, Dawei Lin, Wenzhi Pan(), Daxin Zhou, Junbo Ge   

  1. Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
    Cardiac Cathe Lab, Zhongshan Hospital, Fudan University, Shanghai 200032, China
  • Received:2023-02-06 Online:2023-06-25 Published:2023-07-10
  • Contact: Wenzhi Pan

Abstract:

Objective

To report the 5-year clinical outcomes of transcatheter aortic valve replacement with VitaFlow™ system in the treatment of severe aortic stenosis and to analyze the influence factors.

Methods

From September 2014 to November 2016, 110 patients in 11 centers in China, who were not appropriate for surgical operation were consequently enrolled and underwent transcatheter aortic valve replacement with VitaFlow™ system.After excluding three patients who underwent transcatheter aortic valve replacement (TAVR) surgery but experienced complications, 107 patients remained. The primary endpoints were all-cause death and disabling stroke, and the secondary endpoints were new permanent pacemaker implantation and so on. The Kaplan-Meier method was used to create survival curves, Cox analysis was employed to pinpoint risk factors related to the endpoint events.

Results

The age of the 107 patients [men 53.3% (57/107)] was (77.2±4.8) years old and the Society of Thoracic Surgeons (STS)score was (8.63 ±4.2) %. The 5-year survival rate at follow-up was 83.2%(89/107), the composite incidence of death and disabling stroke was 19.6%(19/107), the rate of new permanent pacemaker implantation was 20.0%(22/107). Multivariate Cox regression showed that diabetes mellitus (HR=2.63,95% CI 1.04-6.69,P=0.042) were independent predictors of all-cause death and disabling stroke occurrence.

Conclusion

Clinical follow-up at 5 years postoperatively demonstrates the good long-term prognosis of the VitaFlow™ in the treatment of patients with severe aortic stenosis who are inappropriate for surgery or at high risk. Diabetes mellitus were independent predictors of long-term prognosis.

Key words: Aortic stenosis, Transcatheter aortic valve replacement, VitaFlow, Outcome, Predictors

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