INTRODUCTION: Data on patients with small aortic annuli (SAA) undergoing transcatheter aortic valve implantation (TAVI) are limited. We aim to describe the impact of aortic annular size, particularly SAA and TAVI valve type on valve haemodynamics, durability and clinical outcomes. METHOD: All patients in National Heart Centre Singapore who underwent transfemoral TAVI for severe symptomatic native aortic stenosis from July 2012 to December 2019 were included. Outcome measures include valve haemodynamics, prosthesis-patient mismatch (PPM), structural valve degeneration (SVD) and mortality. RESULTS: A total of 244 patients were included. The mean Society of Thoracic Surgeons score was 6.22±6.08, with 52.5% patients with small aortic annulus (<23mm), 33.2% patients with medium aortic annulus (23-26mm) and 14.3% patients with large aortic annulus (>26mm). There were more patients with self-expanding valve (SEV) (65.2%) versus balloon-expandable valve (BEV) (34.8%). There were no significant differences in indexed aortic valve area (iAVA), mean pressure gradient (MPG), PPM, SVD or mortality across all aortic annular sizes. However, specific to the SAA group, patients with SEV had larger iAVA (SEV 1.19±0.35cm2/m2 vs BEV 0.88±0.15cm2/m2, P<0.01) and lower MPG (SEV 9.25±4.88 mmHg vs BEV 14.17±4.75 mmHg, P<0.01) at 1 year, without differences in PPM or mortality. Aortic annular size, TAVI valve type and PPM did not predict overall mortality up to 7 years. There was no significant difference in SVD between aortic annular sizes up to 5 years. CONCLUSION Valve haemodynamics and durability were similar across the different aortic annular sizes. In the SAA group, SEV had better haemodynamics than BEV at 1 year, but no differences in PPM or mortality. There were no significant differences in mortality between aortic annular sizes, TAVI valve types or PPM.
Humans ; Transcatheter Aortic Valve Replacement ; Heart Valve Prosthesis ; Aortic Valve Stenosis/surgery* ; Aortic Valve/surgery* ; Prosthesis Design ; Postoperative Complications/surgery* ; Treatment Outcome ; Hemodynamics

INTRODUCTIONThe precise burden of movement disorder conditions in our movement disorders centre is unclear. This study investigated the clinical burden of the Movement Disorders Clinic (MDC) in National Neuroscience Institute (NNI) over 10 years, aiming to identify the burden and spectrum of movement disorders conditions, to facilitate future resource allocation.

MATERIALS AND METHODSWe identified all patient visits from January 2002 to December 2011 at MDC from the Movement Disorders (MD) database using a standardised data collection form.

RESULTSThere was a linear increase in the clinical burden of MDC during this period. Parkinsonism comprised 71.6% of this clinical burden of which 84.8% were Parkinson's disease (PD) patients. Dividing the incident cases of MD conditions into two 5 years' blocks, the proportion of PD cases had not changed. There was significant increase in time to diagnosis for PD, hemifacial spasm and dystonia.

CONCLUSIONThere was nearly 4-fold increase in the burden of movement disorders conditions in our tertiary condition within a decade. However, we did not find increasing proportion of PD cases which would be in line with an ageing population. This could be due to the fact that we are still in the early stages of an ageing population and we postulate that this proportion will go up in the future. The increased time to diagnosis may indicate increasing waiting time to see a movement disorders specialist and that current outreach effort to promote awareness may not be reaching its target audience. The upward trend of clinical burden indicates a need for increased resource allocation to cope with demand for movement disorders services.

Aged ; Cost of Illness ; Female ; Humans ; Male ; Middle Aged ; Movement Disorders ; epidemiology ; Retrospective Studies ; Tertiary Care Centers ; Time Factors