Publications by authors named "Adriaan Schneider"

Objectives: In patients with borderline left hearts or a severe left ventricular outflow tract obstruction, hybrid palliation can be used to stabilize the patient and postpone biventricular repair (BVR). In this study, we analysed growth of left-sided structures and outcomes of these patients.

Methods: We conducted a retrospective cohort study including patients who received hybrid palliation between January 2010 and September 2023.

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Paragangliomas are tumours originating from the autonomic nervous system and rarely occur in the chest. They may manifest through symptoms of excess catecholamine release or due to local compression, can be an incidental finding on a computed tomography/magnetic resonance imaging examination or can be found when screening patients with specific gene mutations. Surgical removal is indicated in case of symptoms, (imminent) compression of vital structures or to prevent progression to malignancy.

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In this video tutorial, the technical details for the implantation of the Freestyle stentless bioprosthesis are outlined based on the case of a 76-year-old male patient with symptomatic stenosis of a bicuspid aortic valve and aortic root dilatation.

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Objectives: We evaluated the outcomes of biventricular repair after initial hybrid palliation performed in small infants with various forms of left ventricle hypoplasia.

Methods: Between September 2010 and January 2020, a total of 27 patients had biventricular repair after hybrid palliation at a median age of 11 days. Indications for the hybrid approach included growth promotion of the left ventricle outflow tract and/or the aortic valve in 14 patients and that of the left ventricle in 13 patients.

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Objectives: Repeat aortic valve interventions after previous stentless aortic valve replacement (AVR) are considered technically challenging with an increased perioperative risk, especially after full-root replacement. We analysed our experience with reinterventions after stentless AVR.

Methods: A total of 75 patients with previous AVR using a Freestyle stentless bioprosthesis (31 subcoronary, 15 root-inclusion and 29 full-root replacement) underwent reintervention in our centre from 1993 until December 2018.

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Objective: We conducted a meta-analysis to estimate the risk of adverse events, life expectancy, and event-free life expectancy after the Ross procedure in adults.

Methods: We searched databases for reports evaluating the Ross procedure in patients aged more than or equal to 16 years of age. A microsimulation model was used to evaluate age- and gender-specific life expectancy for patients undergoing the Ross procedure.

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Objectives: We analysed the outcomes of patients undergoing biventricular repair (BVR) after an initial hybrid Norwood approach as a salvage procedure in extremely sick infants; or as the initial palliation in patients with uncertain feasibility of single-stage BVR due to severe left ventricular outflow tract obstruction; or as part of a left ventricle (LV) recruitment strategy in patients with borderline LVs.

Methods: Between September 2010 and July 2018, 26 patients underwent BVR after initial hybrid palliation at a median age of 13 days. The rationale for the hybrid approach was to promote the growth of the LV in 10 patients and that of the left ventricular outflow tract and/or aortic valve in 12 patients and to be a salvage procedure in 4 patients.

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Article Synopsis
  • - The study evaluated the performance of the Freestyle stentless bioprosthesis in aortic valve replacement to enhance decision-making between patients and doctors regarding valve selection.
  • - Data were collected from 604 patients over 21 years, revealing long-term outcomes like a 15-year survival probability of 47.7%, and low rates of issues like structural valve deterioration (16.9%) and reoperation (8.1%).
  • - The research developed a predictive model that takes factors like age and renal function into account, showing it can effectively inform patients about their individual risks and expected health trajectory after surgery.
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Pulmonary autograft replacement of a diseased aortic valve (the Ross procedure) is effective in children, where growth is essential, and in young patients for whom a biological solution is preferred. Long-term outcomes are generally good. However eventual autograft dilatation may necessitate reoperation.

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Article Synopsis
  • The article discusses surgical approaches for severe infective endocarditis of the aortic valve that leads to extensive damage, particularly focusing on reconstructive techniques after tissue removal.
  • The study involved 35 patients over an 11-year period, revealing that most had significant health concerns prior to surgery, with a majority undergoing aortic root or valve replacements and some also receiving mitral valve repairs.
  • Results showed a 77% early survival rate, but 26% of patients needed further interventions later, highlighting the complexity and risks associated with this type of heart surgery.
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Background: The aim of this study was to analyze long-term outcomes after the Ross procedure, focusing on autograft function and risk of reoperation in time.

Methods: Between February 1994 and February 2016, 154 patients underwent the Ross (n = 105) and Ross-Konno (n = 49) procedure at our institution and were included in this study. Data were collected retrospectively from patients' medical records or through telephone contact.

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Objectives: Infective endocarditis of the aortic valve with local aortic root destruction requires radical resection of infected tissues and subsequent reconstruction of periannular structures and the left ventricular outflow tract (LVOT). Homografts or stentless bioprostheses are recommended for use in this specific patient group. The Freestyle stentless bioprosthesis is a porcine aortic root prosthesis, which approaches the surgical versatility of the homograft, but has the advantage of ready availability and uniform quality.

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Objectives: The Ross-Konno procedure is a last resort for patients with complex multilevel left ventricular outflow tract obstruction (LVOTO) often having other cardiovascular anomalies. It is typically preceded by multiple surgeries. Literature is scarce on long-term follow-up series.

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Background: Management of pulmonary atresia with intact ventricular septum (PAIVS) is challenging and depends on the individual patient's morphologic characteristics. We evaluated outcomes of 25 years of experience in morphologically driven management of PAIVS.

Methods: Between January 1985 and December 2011, 60 patients were treated for PAIVS.

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