Publications by authors named "John K Forrest"

Background: The incidence and clinical importance of bioprosthetic valve dysfunction (BVD) in patients undergoing supra-annular, self-expanding transcatheter aortic valve replacement (TAVR) or surgery is not well understood.

Objectives: The purpose of this study was to evaluate the 5-year incidence and clinical outcomes of BVD in patients undergoing CoreValve/Evolut TAVR or surgery.

Methods: This post hoc analysis pooled data from the U.

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Background: The Evolut Low Risk trial demonstrated that transcatheter aortic valve replacement (TAVR) was noninferior to surgery for the primary endpoint of all-cause mortality or disabling stroke at 2 years. Outcomes at 5 years have not been reported.

Objectives: This study sought to evaluate 5-year clinical and hemodynamic outcomes with TAVR vs surgery in patients from the Evolut Low Risk trial.

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Background: The native aortic annulus for self-expanding transcatheter aortic valve replacement (TAVR) has variable ellipticity. A noncircular and underexpanded transcatheter aortic valve (TAV) may impact hemodynamic performance. This study aimed to quantify Evolut TAV (Medtronic) frame ellipticity and expansion 30 days post-TAVR and evaluate their impact on 1-year hypoattenuating leaflet thickening and 4-year hemodynamics.

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Background: Longer-term outcomes are especially important for lower-risk patients with severe aortic stenosis undergoing transcatheter aortic valve replacement (TAVR) or surgical aortic valve replacement (SAVR). Additional randomized data comparing TAVR and SAVR have recently become available.

Objectives: The purpose of this study was to perform an updated systematic review with conventional pairwise meta-analyses and pooled survival analyses using reconstructed time-to-event individual participant data (IPD) including the totality of randomized evidence comparing longer-term clinical outcomes after TAVR and SAVR in lower-risk patients.

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Background: Aortic stenosis (AS) is the leading cause of valvular heart disease-related morbidity and mortality, but there are no medical treatments to slow its progression. Sodium-glucose cotransporter-2 inhibitors (SGLT2i) have pleiotropic effects which could be disease modifying in AS.

Objectives: The purpose of this study was to determine if SGLT2i usage is associated with slower progression of AS.

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Background: Hypoattenuated leaflet thickening (HALT) is believed to reflect leaflet thrombosis; however, no systematic histological examination of HALT has ever been performed. The aim of this study was to evaluate histological findings of explanted self-expanding transcatheter aortic bioprosthetic valves from clinical trials and to compare microCT findings of suspected HALT with histology findings of valve thrombosis and its characterization over time.

Methods: A total of 123 self-expanding transcatheter aortic valves were collected through autopsy (n=89) or surgical explant (n=34) from 11 CoreValve/Evolut clinical trials.

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Background: Liver cirrhosis is not included in surgical risk prediction models despite being a significant risk factor associated with high periprocedural morbidity and mortality in patients undergoing cardiac surgery. Limited contemporary data exists assessing the outcomes of transcatheter aortic valve replacement (TAVR) and surgical aortic valve replacement (SAVR) in patients with cirrhosis.

Methods: Patients with cirrhosis who underwent TAVR or SAVR were identified from the Nationwide Readmissions Database.

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Background: The cost-effectiveness of transcatheter aortic valve implantation (TAVI) vs. surgical aortic valve replacement (SAVR) has previously been reported across the spectrum of surgical mortality risk. We present an updated analysis specific to the UK based on 4-year data from the Evolut Low Risk Trial, which showed a maintained numerical survival benefit with TAVI.

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Article Synopsis
  • A study compared transcatheter aortic valve replacement (TAVR) with traditional surgery in low-risk patients under 75 years old with severe aortic stenosis to evaluate safety and effectiveness over three years.* -
  • Results showed that TAVR patients had similar overall mortality rates but significantly fewer disabling strokes (0.6%) compared to surgery patients (2.9%), while TAVR also resulted in better valve performance.* -
  • Both treatment options had comparable low rates of valve reinterventions, but TAVR patients experienced higher rates of pacemaker implantation (21.0% vs. 7.1%).*
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Background: Outcomes from transcatheter aortic valve replacement (TAVR) in low-surgical risk patients with bicuspid aortic stenosis beyond 2 years are limited.

Objectives: This study aimed to evaluate 3-year clinical and echocardiographic outcomes from the Evolut Low Risk Bicuspid Study.

Methods: The Evolut Low Risk Bicuspid Study is a prospective, multicenter, single-arm study conducted in 25 U.

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There are limited data from randomized controlled trials assessing the impact of transcatheter aortic valve replacement (TAVR) or surgery in women with aortic stenosis and small aortic annuli. We evaluated 2-year clinical and hemodynamic outcomes after aortic valve replacement to understand acute valve performance and early and midterm clinical outcomes. This post hoc analysis pooled women enrolled in the randomized, prospective, multicenter Evolut Low Risk and Surgical Replacement and Transcatheter Aortic Valve Implantation (SURTAVI) intermediate risk trials.

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Article Synopsis
  • The study compares the 5-year rates of valve reintervention after transcatheter aortic valve replacement (TAVR) using CoreValve/Evolut versus surgical aortic valve replacement (SAVR).
  • It found that TAVR had a higher overall reintervention rate (2.2%) compared to SAVR (1.5%), particularly within the first year.
  • Evolut TAVR showed significantly fewer reinterventions than CoreValve TAVR, but its rates were comparable to SAVR, indicating varying risks associated with different valve types.
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Background: Multidisciplinary heart team (HT) evaluation is recommended for patients with severe primary mitral regurgitation to optimize treatment decisions. However, its impact on patient outcomes remains unknown. We evaluated the impact of implementing mitral HT on patient survival.

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Article Synopsis
  • - This document serves as an evidence-based guideline for naming and classifying congenital bicuspid aortic valve and its associated conditions, aimed at a wide range of medical professionals.
  • - It is designed for use by pediatricians, cardiologists, surgeons, and researchers, ensuring clarity across various healthcare fields.
  • - The consensus is subject to updates as new research and key findings emerge, highlighting its dynamic nature in adapting to evolving medical knowledge.
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Article Synopsis
  • The study investigates the differences in outcomes between two types of failed transcatheter heart valves (balloon-expandable valves vs. self-expanding valves) during surgical explantation.
  • Analyzing data from 401 patients, it reveals that failed balloon-expandable valves had higher rates of certain complications like endocarditis and paravalvular leaks compared to self-expanding valves.
  • Overall, mortality rates and stroke rates were similar across both groups post-explantation, but concomitant mitral surgery emerged as a significant independent predictor of 1-year mortality for both valve types.
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Article Synopsis
  • The study investigated the utilization of aortic valve replacement procedures (TAVR/SAVR) among Medicare beneficiaries hospitalized for aortic stenosis, focusing on differences based on race/ethnicity.
  • The research found that Black, Hispanic, and Asian patients were significantly less likely to receive aortic valve replacement compared to White patients, despite similar mortality rates.
  • The findings suggest that there are underlying inequalities in access to treatment for aortic stenosis that need to be addressed to improve care for disadvantaged populations.
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Background: Early studies on transcatheter aortic valve replacement (TAVR) outcomes showed that female sex was associated with better survival. With increased use of new-generation valves, the impact of sex on contemporary TAVR outcomes is less well known.

Methods: Retrospective analysis using institutional National Cardiovascular Data Registry STS/ACC TVT data was performed on all patients undergoing TAVR at Yale New Haven Hospital from July 2012 to August 2019.

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Background: Coronary accessibility following redo-transcatheter aortic valve replacement (redo-TAVR) is increasingly important, particularly in younger low-risk patients. This study aimed to predict coronary accessibility after simulated Sapien-3 balloon-expandable valve implantation within an Evolut supra-annular, self-expanding valve using pre-TAVR computed tomography (CT) imaging.

Methods: A total of 219 pre-TAVR CT scans from the Evolut Low-Risk CT substudy were analyzed.

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Article Synopsis
  • The study investigates the effects of mitral valve-in-valve (ViV) procedures on patient outcomes, particularly focusing on device position and asymmetry.
  • Researchers analyzed data from 222 patients in the VIVID Registry and found that residual mitral valve stenosis was common, affecting 50% of participants, whereas left ventricular outflow tract (LVOT) obstruction was rare, occurring in 3.2% of cases.
  • Key findings included that greater asymmetry of the transcatheter heart valve was linked to higher rates of residual stenosis, while deeper atrial implantation seemed to reduce the likelihood of LVOT obstruction.
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