Publications by authors named "O'Gara P"

In recent years, there has been a shift in the epidemiology of patients with infective endocarditis (IE). This has been characterized by an alarming increase in IE in patients who inject drugs, cardiac implantable electronic device-related IE, and those with comorbid conditions and high surgical risk. This unmet need has mandated a reevaluation of complex management strategies in these patients and introduction of unconventional approaches in treatment.

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  • 3D intracardiac echocardiography (ICE) is becoming a valuable alternative to transesophageal echocardiography for guiding heart procedures, particularly in structural heart interventions.
  • The expert position statement outlines standardized practices for using 3D-ICE, detailing necessary imaging fundamentals, views, and workflows for various procedures like transeptal puncture and device closures.
  • Additionally, the paper addresses current challenges, potential future developments, and training needs to ensure that operators are proficient with 3D-ICE, aiming to enhance its safety and effectiveness in clinical settings.
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Importance: The use of valve-in-valve (ViV) transcatheter aortic valve replacement (TAVR) has been rapidly expanding as an alternative treatment to redo surgical aortic valve replacement (SAVR) for failed bioprosthetic valves despite limited long-term data.

Objective: To assess mortality and morbidity in patients undergoing intervention for failed bioprosthetic SAVR.

Design, Setting, And Participants: This was a retrospective population-based cohort analysis conducted between January 1, 2015, and December 31, 2020, with a median (IQR) follow-up time of 2.

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  • Orthotopic transcatheter tricuspid valve replacement (TTVR) devices are effective in treating tricuspid regurgitation (TR) and have gained attention after the first device received commercial approval.
  • Studies show that about 35% of patients undergoing TTVR have preexisting cardiac implantable electronic device (CIED) leads, which may become entrapped during the procedure, raising concerns about safety.
  • A consensus document outlines the patient demographics concerning CIED lead-related TR, evaluates the risks of lead entrapment versus transvenous lead extraction, and suggests that a specialized electrophysiologist be included in the treatment team for better decision-making.
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  • Tricuspid valve annuloplasty (TA) during mitral valve repair (MVr) increases the risk of needing a permanent pacemaker (PPM) post-surgery, with a higher 90-day PPM implantation rate for MVr with TA (14.0%) compared to isolated MVr (7.7%).
  • This study analyzed data from New York and California between 2004 and 2019 to evaluate the long-term effects of PPM implantation on survival and complications like heart failure hospitalization and endocarditis.
  • Results indicated that PPM recipients had significantly reduced long-term survival and higher risks of heart failure hospitalizations and endocarditis, regardless of whether they underwent isolated MVr or MVr with TA.
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  • There is a significant lack of diversity among participants in cardiovascular trials, which undermines the generalizability of results and ultimately affects health outcomes across different populations.
  • The Cardiothoracic Surgical Trials Network (CTSN) has acknowledged this issue and initiated a plan to improve representation among both investigators and trial participants, especially focusing on gender and racial diversity.
  • Results from CTSN trials reveal disparities in enrollment, with efforts now aimed at addressing barriers to participation, enhancing awareness of social determinants of health, and implementing active recruitment strategies to ensure a more representative sample in future trials.
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Background: Diabetes may be associated with differential outcomes in patients undergoing left main coronary revascularization with percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG). The aim of this study was to investigate outcomes in patients with left main disease with and without diabetes randomized to PCI versus CABG.

Methods: Individual patient data were pooled from 4 trials (SYNTAX [Synergy Between PCI With Taxus and Cardiac Surgery], PRECOMBAT [Premier of Randomized Comparison of Bypass Surgery Versus Angioplasty Using Sirolimus-Eluting Stent in Patients With Left Main Coronary Artery Disease], NOBLE [Nordic-Baltic-British Left Main Revascularisation Study], and EXCEL [Evaluation of XIENCE Versus Coronary Artery Bypass Surgery for Effectiveness of Left Main Revascularization]) that randomized patients with left main disease to PCI or CABG.

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  • In the ISCHEMIA trial, which involved participants with stable coronary artery disease, both invasive and conservative treatment strategies showed similar risks for cardiac events, but sex-based outcomes had not been reported until this study.
  • The analysis revealed that women in the invasive treatment group were less likely to undergo revascularisation compared to men, indicating a significant sex-based disparity in treatment.
  • Overall, the effectiveness of invasive versus conservative strategies did not differ between sexes, though women experienced fewer procedural myocardial infarctions during treatment.
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Objective: Although acute brain infarcts are common after surgical aortic valve replacement (SAVR), they are often unassociated with clinical stroke symptoms. The relationship between clinically "silent" infarcts and in-hospital delirium remains uncertain; obscured, in part, by how infarcts have been traditionally summarized as global metrics, independent of location or structural consequence. We sought to determine if infarct location and related structural connectivity changes were associated with postoperative delirium after SAVR.

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A global multidisciplinary workshop was convened to discuss the multimodality diagnostic evaluation of aortic regurgitation (AR). Specifically, the focus was on assessment tools for AR severity and analyzing evolving data on the optimal timing of aortic valve intervention. The key concepts from this expert panel are summarized as: 1) echocardiography is the primary imaging modality for assessment of AR severity; however, when data is incongruent or incomplete, cardiac magnetic resonance may be helpful; 2) assessment of left ventricular size and function is crucial in determining the timing of intervention; 3) recent evidence suggests current cutpoints for intervention in asymptomatic severe AR patients requires further scrutiny; 4) left ventricular end-systolic volume index has emerged as an additional parameter that has promise in guiding timing of intervention; and 5) the role of additional factors (including global longitudinal strain, regurgitant fraction, and myocardial extracellular volume) is worthy of future investigation.

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Introduction: To examine risk factors for new-onset postoperative atrial fibrillation (POAF) after cardiac surgery.

Methods: Patients enrolled in the Cardiothoracic Surgical Trials Network multicenter, randomized trial of rate control versus rhythm control for POAF were included. Predictors of POAF were determined using multivariable logistic regression.

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  • Guideline-directed medical therapy (GDMT) is recommended for patients with heart failure and severe functional mitral regurgitation before undergoing mitral valve transcatheter edge-to-edge repair (MTEER), but it's unclear how often this is being followed in practice.
  • A study analyzed data from 4,199 patients with reduced left ventricular ejection fraction who had MTEER, investigating the use of different types of GDMT and its impact on 1-year outcomes.
  • Results showed significant variability in GDMT usage across treatment centers, and those on triple therapy before MTEER had the best outcomes, with lower rates of mortality or heart failure hospitalization compared to those on fewer or no therapies.
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Objective: The International Registry of Acute Aortic Dissection (IRAD) celebrated its 25th anniversary in January 2021. This study evaluated IRAD's role in promoting the understanding and management of acute aortic dissection (AD) over these years.

Methods: IRAD studies were identified, analyzed, and ranked according to their citations per year (c/y) to determine the most-cited IRAD studies and topics.

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Aim: The "2022 ACC/AHA Guideline for the Diagnosis and Management of Aortic Disease" provides recommendations to guide clinicians in the diagnosis, genetic evaluation and family screening, medical therapy, endovascular and surgical treatment, and long-term surveillance of patients with aortic disease across its multiple clinical presentation subsets (ie, asymptomatic, stable symptomatic, and acute aortic syndromes).

Methods: A comprehensive literature search was conducted from January 2021 to April 2021, encompassing studies, reviews, and other evidence conducted on human subjects that were published in English from PubMed, EMBASE, the Cochrane Library, CINHL Complete, and other selected databases relevant to this guideline. Additional relevant studies, published through June 2022 during the guideline writing process, were also considered by the writing committee, where appropriate.

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Importance: Patients with left main coronary artery disease presenting with an acute coronary syndrome (ACS) represent a high-risk and understudied subgroup of patients with atherosclerosis.

Objective: To assess clinical outcomes after PCI vs CABG in patients with left main disease with vs without ACS.

Design, Setting, And Participants: Data were pooled from 4 trials comparing PCI with drug-eluting stents vs CABG in patients with left main disease who were considered equally suitable candidates for either strategy (SYNTAX, PRECOMBAT, NOBLE, and EXCEL).

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  • The study assesses outcomes of transcatheter edge-to-edge mitral valve repair using MitraClip in patients with degenerative mitral regurgitation (MR) in the U.S. from 2014 to 2022, based on real-world data from a large patient registry.
  • Results showed that 88.9% of the 19,088 patients achieved MR success, which was linked to significantly lower mortality rates and heart failure readmissions at one year, particularly in those with minimal residual MR and low mean mitral gradients.
  • At 30 days post-procedure, complications included a 2.7% death rate, 1.2% stroke rate, and 0.97% rate of reinter
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Objective: Antibiotic prophylaxis is recommended before invasive dental procedures to prevent endocarditis in those at high risk, but supporting data are sparse. We therefore investigated any association between invasive dental procedures and endocarditis, and any antibiotic prophylaxis effect on endocarditis incidence.

Subjects And Methods: Cohort and case-crossover studies were performed on 1,678,190 Medicaid patients with linked medical, dental, and prescription data.

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