Publications by authors named "Ryan Cantor"

The World Database for Pediatric and Congenital Heart Surgery (WDPCHS) was utilized to define the incidence of one-year mortality and identify associated risk factors following surgery for congenital heart disease. The WDPCHS was queried from January 2017 to September 2022 for all tier 1 surgeries submitted to the database. Out-of-hospital death was defined as a death between 30 days postoperatively and up to one year.

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Renal dysfunction (RD) is common in patients with heart failure with or without congenital heart disease, but the determinants of renal dysfunction are not well understood in children with heart failure. Low cardiac output is often discussed as a risk factor for RD.The purpose of this study was therefore to elucidate the relationship between renal function and hemodynamic parameters in children with heart failure.

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Objective: Aneurysm sac behavior after fenestrated or branched endovascular repair (FB-EVAR) of thoracoabdominal aortic aneurysms (TAAAs) remains a key knowledge gap. The purpose of this study was to identify independent predictors of sac behavior after FB-EVAR and assess the relationship between sac behavior and long-term survival.

Methods: Patients undergoing FB-EVAR between 2005 and 2023, in 10 physician-sponsored investigational device exemption studies in the United States, were analyzed.

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Background: Primary graft failure (PGF) is a leading cause of early morbidity and mortality after heart transplantation (HTx). PGF is secondary to graft ischemia and ischemia-reperfusion injuries to the cardiomyocytes and vasculature of the donor heart after transplantation. Longer-term outcomes after PGF are not well studied.

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Background: Short-term outcomes following heart transplantation in children have improved, but comparable improvements in long-term survival continues to have barriers. We sought to investigate long-term outcomes following heart transplantation and to identify protective and risk factors associated with long-term survival in children.

Methods: The Pediatric Heart Transplant Society (PHTS) database was queried for heart transplant recipients from 1993 to 2010 who were ≤ 10 years of age at time of transplant.

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Background: Statistical risk models for durable left ventricular assist device (LVAD) implantation inform candidate selection, quality improvement, and evaluation of provider performance. This study developed a 90-day mortality risk model using The Society of Thoracic Surgeons National Intermacs Database (STS Intermacs).

Methods: STS Intermacs was queried for primary durable LVAD implants from January 2019 to September 2023.

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Background: The Pediatric Interagency Registry for Mechanical Circulatory Support (Pedimacs), supported by The Society of Thoracic Surgeons, provides detailed information on pediatric patients supported with ventricular assist devices (VADs).

Methods: From September 19, 2012, to December 31, 2023, there were 1648 devices in 1349 patients (aged <19 years) from 39 North American Hospitals, with 100 patients enrolled in 2023.

Results: Cardiomyopathy was the most common underlying etiology (59%), followed by congenital heart disease (26%) and myocarditis (8%).

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The 15th Annual Report from The Society of Thoracic Surgeons Interagency Registry for Mechanically Assisted Circulatory Support includes 29,634 continuous-flow left ventricular assist devices from the 10-year period between 2014 and 2024. The outcomes reported here demonstrate continued improved survival in the current era of fully magnetically levitated devices, with a significantly higher 1-year (85.7% vs 78.

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Article Synopsis
  • Arrhythmias can cause severe heart issues in children, and when they are severe, heart transplantation (HTX) may be necessary, but this group has not been distinctively studied.
  • *This study aimed to look at pediatric patients who needed HTX primarily due to malignant arrhythmia (MA) and how their outcomes compared to others on the list.
  • *Out of thousands listed for HTX, only 63 patients (1.4%) had MA as the reason; although they were generally older and more likely to have had cardiac arrests, their chances of surviving and recovering after transplantation were similar to those without MA.
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Article Synopsis
  • - This study examined the incidence and risk factors for early stroke within the first week after the implantation of a left ventricular assist device (LVAD), revealing that 5.9% of patients experienced a stroke, with about half occurring in the initial 7 days post-surgery.
  • - Key findings indicated that older age, having a temporary mechanical circulatory support (MCS) device, being of white race, and the presence of a left atrial clot before surgery were all associated with a higher risk of early stroke.
  • - The study highlights the need for ongoing risk assessment and improvement strategies in the management of patients undergoing LVAD implantation to reduce early stroke occurrences.
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Background: Studies evaluating the prevalence and impact of recurrent rejection (RR) in pediatric heart transplant (HT) are sparse.

Objectives: The purpose of this study was to describe prevalence and impact of RR on cardiac allograft vasculopathy (CAV) and graft loss after pediatric HT.

Methods: Data on HT from January 1, 2000, to June 30, 2020, in the Pediatric Heart Transplant Society database were included.

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Article Synopsis
  • The study investigates the use of mechanical circulatory support (MCS) in pediatric heart transplant patients, focusing on incidence, contributing factors, and outcomes based on a large database from 2010-2020.
  • Among 4,321 primary heart transplants analyzed, 5.8% (249 patients) required MCS, with factors like congenital heart disease and older donor age linked to higher MCS need, while larger recipient size and better donor heart function correlated with lower needs.
  • The one-year survival rate for patients requiring MCS was significantly lower at 54.2% compared to 94.8% for those without, but those who survived the first year had favorable long-term outcomes, suggesting selective use of MCS
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Background: Extending survival after heart transplant (HT) is of paramount importance for childhood recipients of HT. Acute rejection is a significant event, and biopsy remains the most specific means for distinguishing between cellular (ACR) and antibody-mediated rejection (AMR).

Methods: All children in the Pediatric Heart Transplant Society Registry who underwent HT between January 2015 and June 2022 and had ≥1 rejection episode were included.

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Background: Patients have substantial variability in perioperative outcomes after left ventricular assist device (LVAD) implant. A perioperative multidimensional tool integrating mortality, adverse events (AEs), and patient-reported outcomes to assist in quality improvement initiatives is needed.

Methods: Patients undergoing HeartMate 3 LVAD implant (January 1, 2017 to January 31, 2024) in the Society of Thoracic Surgeons' Intermacs registry were studied.

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Background: Waitlist mortality (WM) remains elevated in pediatric heart transplantation. Allocation policy is a potential tool to help improve WM. This study aims to identify patients at highest risk for WM to potentially inform future allocation policy changes.

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Article Synopsis
  • This study looks at how the size of an aortic aneurysm (a balloon-like bulge in a blood vessel) changes after a special surgery called FBEVAR, which is used for certain types of aneurysms.
  • Researchers found that out of 290 patients, some had the size of their aneurysm grow while others saw it shrink, and some stayed the same after surgery.
  • They discovered that older patients and those with a specific type of problem called type II endoleaks were more likely to have their aneurysm size get bigger after the surgery.
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Background: Limited research exists on the influence of social determinants of health (SDOH) on outcomes in pediatric patients with advanced heart failure receiving mechanical circulatory support.

Methods: Linkage of the Pediatric Interagency Registry for Mechanical Circulatory Support (Pedimacs) and Society of Thoracic Surgeon's Congenital Heart Surgery Database (STS-CHSD) identified pediatric patients who underwent ventricular assist device (VAD) implantation from 2012 to 2022 with available residential zip codes. Utilizing the available zip codes, each patient was assigned a Childhood Opportunity Index (COI) score.

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Background: The Pediatric Interagency Registry for Mechanical Circulatory Support (Pedimacs) provides detailed understanding on pediatric patients supported with ventricular assist devices (VADs). We sought to identify important variables affecting the incidence of stroke in pediatric VADs.

Methods: Between 2012 and 2022, 1463 devices in 1219 patients were reported to Pedimacs from 40 centers in patients aged <19 years at their first VAD implantation.

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Background: Impacts of ischemic time (IT) on pediatric heart transplant outcomes are multifactorial. We aimed to analyze the effect of prolonged IT on graft loss after pediatric heart transplantation. We hypothesized that graft survival with prolonged IT has improved across eras.

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Background: The Pediatric Interagency Registry for Mechanical Circulatory Support (Pedimacs), supported by The Society of Thoracic Surgeons, provides detailed information on pediatric patients supported with ventricular assist devices (VADs).

Methods: From September 19, 2012, to December 31, 2022, 1463 devices in 1219 patients aged <19 years were reported to the registry from 40 North American hospitals.

Results: Cardiomyopathy remains the most common underlying etiology (59%), followed by congenital heart disease (26%) and myocarditis (8%).

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Background: Cardiac allograft vasculopathy (CAV) is a leading cause of graft failure in pediatric heart transplant recipients (HTRs). Early statin use has been shown to reduce CAV incidence and all-cause mortality in adult HTRs. We sought to evaluate the contemporary prevalence and trends of statin use in pediatric HTRs and the association between statin use with CAV development and graft failure.

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The 14th Annual Report from The Society of Thoracic Surgeons (STS) Interagency Registry for Mechanically Assisted Circulatory Support (Intermacs) describes outcomes of 27,493 patients with a continuous-flow left ventricular assist device (LVAD) from the past decade (2013-2022). In 2022, 2517 primary LVADs were implanted, of which 2512 (99.8%) were fully magnetically levitated (Mag-Lev) devices.

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Background: Left ventricular assist devices (LVADs) have been implanted as bridge to transplantation (BTT), bridge to candidacy (BTC) or destination therapy (DT) on the basis of relative and absolute contraindications to transplantation. Multiple factors may lead to changes in the strategy of support after LVAD implantation.

Methods: Based on INTERMACS (Interagency Registry for Mechanically Assisted Circulatory Support) 2012-2020 data, 11,262 patients survived to 3 months on continuous-flow LVADs with intent of BTT or DT.

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Background: The Pediatric Heart Transplant Society (PHTS) Registry was founded 30 years ago as a collaborative effort among like-minded providers of this novel life-saving technique for children with end-stage heart failure. In the intervening decades, the data from the Registry have provided invaluable knowledge to the field of pediatric heart transplantation. This report of the PHTS Registry provides a comprehensive look at the data, highlighting both the longevity of the registry and one unique aspect of the PHTS registry, allowing for exploration into children with single ventricle anatomy.

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