Publications by authors named "Takuya Ogami"

Background: Transcatheter aortic valve replacement (TAVR) has become a cornerstone in the management of aortic valve disease. However, delayed complications after hospital discharge and readmission remain in an issue following TAVR. We aimed to evaluate the impact of remote monitoring systems on clinical outcomes after TAVR.

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Background: End-stage renal disease (ESRD) is associated with increased morbidity and mortality in patients undergoing coronary artery bypass grafting (CABG), however the survival benefit of arterial grafting in this population remains unclear. Given the dramatic impact that transplantation can have on long-term survival in patients with ESRD, this study compared hospital and long-term survival for arterial vs. SVG-only grafting in transplanted and non-transplanted patients with ESRD.

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Background: This study aimed to elucidate the incidence, risk factors, and midterm outcomes associated with hemodynamic valve deterioration (HVD) 1 year after transcatheter aortic valve implantation (TAVI).

Methods: This was a retrospective, single-institution cohort study of consecutive TAVIs from 2012 to 2022. Patients with immediate post-TAVI, 30-day, and 1-year echocardiographic data were included.

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Background: There is a lack of consensus regarding the best strategy for aortic root replacement with current guidelines supporting the use of mechanical valves in younger patients when a valve repair is not possible. We sought to describe our institutional experience with mechanical aortic root replacement.

Methods: This was a descriptive study using an institutional database of aortic root replacements with a mechanical valve composite graft performed at our center from 2010 to 2022.

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Background: To determine the impact of tricuspid regurgitation (TR) on outcomes after transcatheter aortic valve implantation (TAVI), and to determine the evolution of TR severity after TAVI.

Methods: This was an observational study of TAVIs for aortic stenosis from November 2012 to December 2021. Patients were dichotomized according to the severity of pre-TAVI TR: less than moderate versus moderate or greater.

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Background: Variability in transcatheter aortic valve replacement (TAVR) readmission rates highlights the importance of assessing post-discharge outcomes. Understanding how teaching hospital status and causes of readmission influence mortality could optimise post-TAVR care.

Methods: Using the National Readmissions Database, we identified 155,298 TAVR admissions from 2012 to 2020.

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Background: Specific transcatheter aortic valve replacement (TAVR) valve superiority is not established in the small aortic annulus (SAA) population. We sought to compare clinical and echocardiographic characteristics between patients with a SAA who underwent TAVR with either intra-annular self-expanding valves (SEV) or balloon-expandable valves (BEV).

Methods: This was an observational, retrospective analysis (2013-2023).

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Objective: This study sought to determine the impact of surgical versus transcatheter aortic valve replacement in patients with low-flow, low-gradient aortic stenosis.

Methods: This was an observational study of consecutive aortic valve replacements for severe aortic stenosis from 2010 to 2023. Patients with low-flow, low-gradient aortic stenosis (aortic valve mean gradient <40 mm Hg and a stroke volume index <35 mL/m) were included.

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Objective: To determine the impact of hematocrit on adverse neurologic events after acute type A aortic dissection (ATAAD) repair under deep hypothermic circulatory arrest.

Design: Retrospective study of consecutive aortic surgeries from 2010 to 2021.

Setting: Single institution.

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Background: There has been a significant increase in the utilization of non-mechanical valves in the aortic position over time. However, details in reinterventions after aortic root replacement (ARR) with non-mechanical prosthesis were limited in the literature, despite the potential importance of reinterventions in the lifetime management of aortic valve disease.

Methods: This is a single-center retrospective study, identifying all patients who underwent ARR with allograft, xenografts, and stented bioprosthetic valved conduit from 2010 to 2020.

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Introduction: Thoracic endovascular aortic repair (TEVAR) has gained preference over open surgical repair (OSR) as the intervention of choice for patients with descending thoracic aortic aneurysm (DTA). This study aimed to compare the outcomes of patients with DTA undergoing OSR and TEVAR with contemporary findings.

Evidence Acquisition: A comprehensive search of MEDLINE and EMBASE databases was conducted to identify relevant randomized controlled trials or studies utilizing propensity-score analysis or reporting risk-adjusted outcomes.

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Objective: With an aging population and advancements in imaging, recurrence of thoracic aortic dissection is becoming more common.

Methods: All patients enrolled in the International Registry of Aortic Dissection from 1996 to 2023 with type A and type B acute aortic dissection were identified. Among them, initial dissection and recurrent dissection were discerned.

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Article Synopsis
  • This study investigates the occurrence and effects of unplanned coronary artery bypass grafting (CABG) during aortic root replacement (ARR) at a university hospital from 2011 to 2022.
  • Among 795 patients, 4.3% required unplanned CABG, most commonly due to ventricular dysfunction, and the study found no link between unplanned CABG and increased mortality rates.
  • Notably, a smaller body surface area (below 1.7) was identified as a significant risk factor for needing unplanned CABG.
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Background: There continues to be debate regarding the superiority of transcatheter (TAVR) over surgical aortic valve replacement (SAVR) in patients with bicuspid aortic valves (BAV). We aimed to compare outcomes during readmissions in elderly patients with BAV who underwent SAVR or TAVR.

Methods: Patients 65 years or older with BAV who underwent TAVR or isolated SAVR were identified using the National Readmission Database from 2012 through 2018.

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Background: Trileaflet aortic valve neocuspidization (AVN) using autologous pericardium (Ozaki procedure) is an emerging surgical treatment option for aortic valve diseases. Although excellent results have been reported from Japan, data pertaining to its use in the United States are sparse.

Methods: All adult patients who underwent AVN (AVN group) or surgical aortic valve replacement (SAVR) with a bioprosthetic valve (SAVR group) between 2015 and 2022 were identified.

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Article Synopsis
  • This study examines the frequency, outcomes, and factors related to aortic reinterventions after surgical repair of acute type A aortic dissection from 2010 to 2021.
  • Out of 601 patients analyzed, 11.8% required reinterventions, with a cumulative incidence of 16% after 10 years, typically occurring around 4 years post-surgery.
  • Analysis revealed that while the reinterventions had a low operative mortality rate of 5.6%, they did not significantly affect long-term survival rates among patients.
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Background: It is known that nursing home patients who have sustained a previous fall are at a higher average risk for recurrent falls. Therefore, these patients require closer attention and monitoring for fall prevention.

Methods: We conducted a retrospective review in our Level 1 Trauma Center, who sustained a ground-level fall in a nursing home from January 2017 to December 2018.

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Background: Thoracic endovascular aortic repair (TEVAR) has evolved as the standard for treating complicated acute type B aortic dissection (ATBAD). Acute kidney injury (AKI) is a common complication in critically ill patients and is commonly observed in patients with ATBAD. The purpose of the study was to characterize AKI after TEVAR.

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Chemodectomas are tumors derived from parasympathetic nonchromaffin cells and are often found in the aortic and carotid bodies. They are generally benign but can cause mass-effect symptoms and have local or distant spread. Surgical excision has been the main curative treatment strategy.

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Objective: Reoperative sternotomy is associated with poor outcomes after cardiac surgery. We aimed to investigate the impact of reoperative sternotomy on the outcomes after aortic root replacement.

Methods: All patients who underwent aortic root replacement from January 2011 to June 2020 were identified using the Society of Thoracic Surgeons Adult Cardiac Surgery Database.

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Acute coronary syndrome (ACS) encompasses a broad category of presentations from unstable angina to ST-elevation myocardial infarctions. Most patients undergo coronary angiography upon presentation for diagnosis and treatment. However, the ACS management strategy after transcatheter aortic valve implantation (TAVI) may be complicated because of challenging coronary access.

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Background Thoracic endovascular aortic repair (TEVAR) has been increasingly used for the treatment of descending thoracic aortic aneurysms and dissections. This study sought to evaluate the influence of sex on outcomes after TEVAR. Methods and Results This was an observational study from the Nationwide Readmissions Database analyzing all patients who underwent TEVAR from 2010 to 2018.

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Background: This study sought to evaluate outcomes of transcatheter aortic valve replacement (TAVR) in patients with moderate or greater aortic regurgitation (AR).

Methods: This was an observational study using an institutional database of TAVRs from November 2012 to April 2022. The study compared outcomes of TAVR in patients with isolated aortic stenosis (AS) vs patients with AS and concomitant AR (moderate or greater).

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Background: Stentless aortic root replacement (ARR) and aortic root enlargement (ARE) are established strategies to avoid prosthesis-patient mismatch in patients with aortic stenosis (AS) and small annuli. We sought to compare outcomes of these 2 procedures.

Methods: This was an observational study using an institutional database of aortic valve replacements from 2010 to 2021.

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Introduction: Transcatheter aortic valve implantation (TAVI) continues to be the most common modality of treating aortic stenosis in the United States. While infective endocarditis (IE) and its outcomes have been well documented after surgical aortic valve replacement, the incidence and outcomes of early IE after TAVI have not been well described.

Methods: All patients who underwent TAVI from 2012 through 2018 were identified using the National Readmission Database.

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