Publications by authors named "Yuriy Stukov"

A combined en bloc heart and liver transplant is a rare form of a combined dual organ transplant in which the donor heart and liver remain connected via the inferior caval vein both during procurement and during the transplant. We present a patient who underwent a combined en bloc heart and liver transplant due to heart failure and cirrhosis, after having previously undergone repair of complex biventricular congenital heart disease.

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The Berlin Heart EXCOR is used in paediatric patients with ventricular failure for temporary support as a bridge to a cardiac transplant or, occasionally, as a bridge to ventricular recovery. Neonates, infants and children who are supported with ventricular assist devices while gaining weight also have an increased demand for cardiac output while supported. Some patients might need a few pump exchanges to meet circulatory needs while growing.

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We present the case of a 24-year-old female who was supported with ProtekDuo cannula with variations of venopulmonary (VP) extracorporeal membrane oxygenation. The patient was cannulated for acute respiratory distress syndrome and she underwent bilateral orthotopic lung transplantation. This is the first report of the ProtekDuo cannula as a drainage cannula in central (dl)VP-/AO ECMO for 5 days.

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Article Synopsis
  • Paediatric lung transplantation offers hope for patients with terminal lung conditions, but it faces challenges like poor mucus clearance and increased infection risk due to immunosuppression.
  • Organ preservation is crucial for the quality of donor lungs, as improper handling can lead to damage during transport.
  • The FDA-approved Paragonix BAROguard Donor Lung Preservation System helps maintain proper pressure and temperature for donor lungs during transportation, enhancing preservation methods and potentially improving transplant outcomes.
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We present the cannulation technique for venopulmonary extracorporeal membrane oxygenation using the ProtekDuo dual-lumen cannula in a patient who, after a bilateral orthotopic lung transplant and coronavirus disease 2019 infection, was converted from a multisite venovenous extracorporeal membrane oxygenation configuration, using the same vessel.

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Refractory end-stage pulmonary failure may benefit from extracorporeal life support (ECLS) as a bridge to lung transplantation. Veno-venous (VV) extracorporeal membrane oxygenation (ECMO) has been recommended for patients who have failed conventional medical therapy and mechanical ventilation. Veno-arterial (VA) ECMO may be used in patients with acute right ventricular (RV) failure, haemodynamic instability, or refractory respiratory failure.

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Donor organ recovery techniques have improved with novel preservation solutions, implementation of advanced preservation systems and machine perfusion. However, surgical techniques for organ procurement have not changed. In this video tutorial, we have outlined key steps in double lung en bloc organ recovery, including introduction of pulmonoplegia, pulmonectomy en bloc and separation of the two single-lung blocks.

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  • * Results showed that in tissue models, the sutures pulled through the aortic tissue under low force, while the stand model demonstrated that two purse-string sutures with ligaclips effectively held the cannula against much higher forces.
  • * The conclusion emphasized the importance of securing ECMO cannulas to prevent dislodgement and suggested that larger diameter sutures are better at withstanding force, with two medium hemostatic clips providing reliable fixation.
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A combined heart+liver transplant is the only option for survival in some patients with end-stage combined cardiac and hepatic disease. These patients may suffer from congenital or acquired cardiac disease. The potential aetiologies of the associated hepatic disease are heterogeneous and include systemic disease that impacts the liver as well as venous congestion in patients with functionally univentricular circulation.

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In this video tutorial, we present a comprehensive step-by-step operative technique for a bilateral orthotopic lung transplant using a bilateral transverse thoracosternotomy in a patient with idiopathic pulmonary fibrosis lung disease. The donor lungs were exposed to extended cold static ischaemic storage at 10° C for the semi-elective operation.

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In this video tutorial, we present the cannulation technique for venopulmonary extracorporeal membrane oxygenation using the ProtekDuo dual-lumen cannula in a patient with acute respiratory distress syndrome.

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  • Various surgical methods to treat aortic coarctation in neonates and infants are evaluated based on patient anatomy, with a review conducted on 132 patients at the University of Florida from 2006 to 2021.
  • Patients underwent surgery either for aortic coarctation or hypoplastic aortic arch, with techniques varying between median sternotomy and left lateral thoracotomy, where the most common methods included end-to-side reconstruction and extended end-to-end repair.
  • The study found a 0.76% operative mortality rate and a low incidence of recurrent coarctation requiring further operations, indicating that personalized surgical approaches are effective and safe.
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Introduction: Non-atherosclerotic causes of acute coronary syndrome (ACS) are important contributors to a substantial number of acute ischemic coronary events. Syphilitic aortitis is a rare complication of tertiary cardiovascular syphilis that may result in ostial coronary artery stenosis, aortic insufficiency, and ascending aortic aneurysm.

Methods: In this manuscript, we present two Case Reports of patients with bilateral syphilitic coronary artery ostial occlusion, and we review the associated literature.

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  • Researchers previously identified a stem cell-derived additive that enhances heart protection during cold ischemia, aimed at improving procedures in cardiac transplantation.
  • The study involved eight pigs, comparing two methods of cold ischemic time (CIT)—one utilizing chest cavity storage and the other external storage—while measuring their heart performance.
  • Results showed that the external storage method had longer CIT and different temperature conditions, but both methods maintained similar initial heart performance metrics.
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  • The study evaluated the outcomes of 36 infants weighing less than 5 kg who received a Berlin Heart pulsatile ventricular assist device, comparing those with acquired heart disease (8 patients) and congenital heart disease (28 patients).
  • The primary focus was on mortality and survival rates, which showed a 1-year survival estimate of 62.7% for all patients and 87.5% specifically for those with acquired heart disease.
  • Notably, 72.22% of the infants were successfully bridged to transplantation, with a significant difference in success rates between those with acquired (100%) and congenital heart disease (64.3%).
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In this video tutorial, we present neck cannulation for venovenous extracorporeal membrane oxygenation using a crescent right atrial double lumen cannula in a 4-kg baby.

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Article Synopsis
  • * Key findings revealed that 1-year survival rates were significantly lower for CHD patients (59.9%) compared to AHD patients (88.6%), and this trend continued at 5 years (55.4% for CHD vs. 85.3% for AHD).
  • * The duration of VAD support varied, with CHD patients receiving median support for 134 days and AHD patients for 97 days; additionally, the outcomes showed that a majority of both groups went on
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  • The study evaluated the quality and readability of online resources related to hypoplastic left heart syndrome (HLHS) to ensure they are accessible for patients and families, given the average reading level of US citizens is around 8th grade.
  • A total of 52 health websites were analyzed for their accountability, content quality, interactivity, and structure, with only 32.7% disclosing authorship and 26.9% citing sources, indicating low accountability.
  • Open-access websites scored the highest on overall quality and accountability compared to hospital or healthcare organization sites, suggesting the need for improvements in the latter to enhance patient education.
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  • * A survey was conducted among 37 students who participated, revealing a significant increase in interest in medicine and cardiothoracic surgery after their shadowing experience.
  • * Findings indicated that students with family members in medicine had more prior clinical exposure, while those without such connections could benefit more from these shadowing opportunities to enhance their career understanding.
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Background: We reviewed our management strategy and outcome data for all 181 patients with pediatric or congenital heart disease who received 186 heart transplants from January 1, 2011, to March 1, 2022, and evaluated the impact of pretransplant ventricular assist device (VAD).

Methods: Continuous variables are presented as mean (SD); median [interquartile range] (range). Categorical variables are presented as number (percentage).

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  • Some patients with functionally univentricular circulation face severe cardiac failure and may require a ventricular assist device (VAD) for support.
  • The University of Florida focuses on identifying extremely high-risk neonates before surgery, using preemptive sVAD support to prepare them for potential cardiac transplantation.
  • This strategy is associated with low operative mortality rates (2.9%) after the first stage of surgery and high one-year survival rates (91.1%) for patients with hypoplastic left heart syndrome.
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Objectives: We reviewed outcomes in all 36 consecutive children <5 kg supported with the Berlin Heart pulsatile ventricular assist device (VAD) at the University of Florida, comparing those with univentricular circulation (n  =  23) to those with biventricular circulation (n  =  13).

Methods: The primary outcome was mortality. Kaplan-Meier methods and log-rank tests were used to assess group differences in long-term survival after VAD insertion.

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Background: We reviewed our management strategy and outcome data for all 311 patients less than 18 years of age who underwent 323 heart transplants at our institution (1986 to 2022) in order to assess changes in patterns of practice and outcomes over time and to compare two consecutive eras: era 1 (154 heart transplants [1986 to 2010]) and era 2 (169 heart transplants [2011 to 2022]).

Study Design: Descriptive comparisons between the two eras were performed at the level of the heart transplant for all 323 transplants. Kaplan-Meier survival analyses were performed at the level of the patient for all 311 patients, and log-rank tests were used to compare groups.

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The standard method for cardiac allograft preservation for the past 50 years has been static storage using crushed ice. A heart transplant transportation system designed to improve preservation quality with temperature monitoring, the Paragonix SherpaPak Cardiac Transport System (SCTS), was evaluated for its impact on postoperative costs relative to conventional ice storage. Observational US multicenter registry data collected during the August 2015 to November 2021 timeframe from 12 transplant hospitals were analyzed using logistic regression analysis and propensity matching to balance measured baseline covariates and to reduce selection bias.

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Background: We reviewed our management strategy and outcome data for all 179 patients with pediatric and/or congenital heart disease who underwent 183 heart transplants from January 1, 2011, to December 31, 2021, and evaluated the impact of elevated panel reactive antibody (PRA).

Methods: High PRA was defined as PRA >10%. Univariate associations with long-term survival were assessed with Cox proportional hazards models.

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