Transcatheter aortic valve implantation: restoring the qualities of life in old age

Quality of life among elderly patients undergoing transcatheter or surgical aortic valve replacement- a model-based longitudinal data analysis

Background

Quality of life (QoL) measurements reported in observational studies are often biased, since patients who failed to improve are more likely to be unable to respond due to death or impairment. In order to observe the development of QoL in patients close to death, we analyzed a set of monthly QoL measurements for a cohort of elderly patients treated for aortic valve stenosis (AS) with special consideration of the effect of distance to death.

Methods

QoL in 169 elderly patients (age ≥ 75 years), treated either with transcatheter aortic valve replacement (TAVR; n = 92), surgical aortic-valve replacement (n = 70), or drug-based therapy (n = 7), was evaluated using the standardized EQ-5D questionnaire. Over a two-year period, patients were consulted using monthly telephone interviews or outpatient visits, leading to a total of 2463 time points at which QoL values, New York Heart Association (NYHA) Functional Classification and their status of assistance were assessed. Furthermore, post-procedural clinical events and complications were monitored. Linear and ordered logistic regression analyses with random intercept were carried out, taking into account overall trends and distance to death.

Results

QoL measures decreased slightly over time, were temporarily impaired at month 1 after the initial episode of hospitalization and decreased substantially at the end of life with a measurable effect starting at the sixth from last follow-up (month) before death. Many clinical complications (bleeding complications, stroke, acute kidney injury) showed an impairment of QoL measurements, but the inclusion of lagged variables demonstrated medium term (three months) QoL impairments for access site bleeding only. All other complications are associated with event-related impairments that decreased dramatically at the second and third follow-up interviews (month) after event.

Conclusions

Distance to death shows clear effects on QoL and should be taken into account when analyzing QoL measures in the elderly patients treated for aortic valve stenosis.

Trial registration

German Clinical Trial Register Nr. DRKS00000797

Novel approaches for prevention of stroke related to transcatheter aortic valve implantation

Transcatheter aortic valve implantation (TAVI) has emerged as a therapeutical option in patients with aortic stenosis. The methodology has evolved rapidly throughout the last decade. Nowadays, peri-procedural circulatory support, surgical vascular access, general anesthesia and mechanical ventilation are mainly reserved for selected patients. However, numerous challenges need to be addressed in order to further improved outcome of this distinct cohort: patient selection in general, vascular access strategies, long-term valve performance and paravalvular leakage. Another key issue is the risk of cerebrovascular events related to TAVI. In this article, the authors review the current literature on the risk of cerebrovascular events, the underlying mechanisms, the diagnostic read-outs of cerebral injury and their prognostic value, and ultimately discuss conceivable concepts for prevention of stroke associated with TAVI.