Publications by authors named "Nersesian G"

We investigated the association of preimplant left ventricular end-diastolic diameter (LVEDD) with outcomes after HeartMate 3 (HM3) left ventricular assist device (LVAD) implantation. Patients from the European Registry for Patients with Mechanical Circulatory Support (EUROMACS) registry who underwent HM3 implantation from August 2014 to February 2023 (n = 834) were analyzed according to preoperative LVEDD: less than or equal to 65 (n = 251), 65-80 (n = 441), and greater than or equal to 80 mm (n = 142). The mean age was 54.

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Background: Temporary mechanical circulatory support (tMCS) has become a standard treatment in cardiogenic shock but is associated with high complication rates. This study analyzes common complications associated with modern tMCS devices and their impact on mortality depending on the tMCS approach.

Methods: We conducted a retrospective single-center analysis of patients with all-cause cardiogenic shock treated with veno-arterial extracorporeal life support, microaxial flow pump, and a combination of both (ECMELLA).

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Venoarterial extracorporeal membrane oxygenation (VA-ECMO) is applied for the treatment of cardiogenic shock. Concomitant left ventricular unloading (LVU) with a microaxial flow pump (mAFP) enables myocardial and pulmonary recovery and may overcome some of the limitations of VA-ECMO. The study included 145 cardiogenic shock patients, 89 (61.

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Objectives: Post-infarct ventricular septal defect is a rare but devastating complication. Delayed treatment offers better outcomes than emergency surgery, but when acute cardiogenic shock or unstable haemodynamics occur, temporary mechanical circulatory support may be needed to stabilize patients until treatment. The aim of our systematic review was to assess the outcomes of using Impella in this setting.

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Introduction: Left ventricular assist device (LVAD) therapy may lead to an aortic regurgitation, limiting left ventricular unloading and causing adverse events. Whether concomitant aortic valve replacement may improve outcomes in patients with preoperative mild-to-moderate aortic regurgitation remains unclear.

Methods: A retrospective propensity score-matched analysis of adult patients with preoperative mild-to-moderate aortic regurgitation undergoing durable LVAD implantation between 01/01/2011 and 30/11/2021 was performed.

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Background: Circulatory support with a catheter-based microaxial flow pump (mAFP) plays a major role in the treatment of severe cardiogenic shock. In most patients who fail to recover while on temporary mechanical circulatory support (tMCS) and who are not eligible for heart transplantation, durable left ventricular assist device (dLVAD) implantation is usually considered a reliable option. This study aimed to describe the outcome of dLVAD therapy following mAFP support and to identify predictors of mortality.

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Article Synopsis
  • * The study retrospectively compared outcomes of patients with coronary artery disease (CAD) and very low left ventricular function who received either CABG or LVAD, using statistical matching to analyze 168 pairs.
  • * Results indicated that while LVAD patients needed longer ventilation and ICU stays, they had lower rates of postoperative renal therapy and required less temporary mechanical support; however, CABG patients had significantly better mid-term survival rates compared to those receiving LVADs.
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Heart failure (HF) is a common disease associated with high morbidity and mortality rates despite advanced pharmacological therapies. Heart transplantation remains the gold standard therapy for end-stage heart failure; however, its application is curtailed by the persistent shortage of donor organs. Over the past two decades, mechanical circulatory support, notably Left Ventricular Assist Devices (LVADs), have been established as an option for patients waiting for a donor organ.

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Objectives: The aim of this study was to evaluate the outcomes of transposition of the omentum into the mediastinum to support the replacement of infected aortic grafts or to cover infected aortic grafts that are not amenable for surgical replacement.

Methods: All patients with thoracic aortic graft infections who underwent mediastinal transposition of the omentum at our institution between 2005 and 2023 were included in this study. Mediastinal transposition of the omentum was performed either after replacement of the infected graft ('curative concept') or solely as bailout procedure by wrapping the infected graft ('palliative concept').

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Article Synopsis
  • Stroke after left ventricular assist device implantation is linked to high mortality rates, and the study investigates the incidence and outcomes related to temporary mechanical support methods in patients needing a bridge to durable LVAD.
  • A retrospective analysis of 341 patients revealed that early ischemic stroke occurred in 10.8% and hemorrhagic stroke in 2.9% of cases post-d-LVAD implantation, with specific device types and conditions affecting hemorrhagic stroke risks.
  • Both ischemic and hemorrhagic strokes significantly correlated with higher one-year mortality rates, indicating a need for careful management in patients undergoing d-LVAD procedures.
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Objectives: The combination of veno-arterial extracorporeal membrane oxygenation with a micro-axial flow pump (ECMELLA) is increasingly used for cardiogenic shock (CS) therapy. We report our experience with a novel single-artery access ECMELLA setup with either femoral (2.0) or jugular venous cannulation (2.

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Temporary mechanical circulatory support is a treatment of choice for patients in severe cardiogenic shock. Combining veno-arterial extracorporeal life support (ECLS) with devices that enable left ventricular unloading emerges as a promising strategy to diminish detrimental effect of elevated left ventricular afterload and to improve survival. However, the need to establish multiple arterial access sites remains a major drawback of this approach due to a significant rate of vascular complications.

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Recently, temporary mechanical circulatory support (tMCS) has been increasingly used for cardiogenic shock therapy. Originally designed as a bail-out option for patients who could not be weaned from cardiopulmonary bypass, the indications for tMCS have been expended and now enable us to support a wide range of patients with various cardiac pathologies. Modern tMCS devices include microaxial flow pumps (mAFP) which are small, versatile systems that can provide both acute cardiac support and cardiac protection for high-risk interventions.

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Mechanical circulatory support has proven effective in managing postcardiotomy cardiogenic shock by stabilizing patients' hemodynamics and ensuring adequate organ perfusion. Among the available device modalities, the combination of extracorporeal life support and a microaxial flow pump for left ventricular unloading has emerged as a valuable tool in the surgical armamentarium. In this publication, we provide recommendations for the application and weaning of temporary mechanical circulatory support in cardiogenic shock patients, derived from a consensus among leading cardiac centers in German-speaking countries.

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Background: Impella 5.0 and 5.5 (summarized as Impella 5+) are microaxial, catheter-based left ventricular assist devices (LVAD) that are implanted via a vascular graft sutured to the axillary artery and provide blood flow of up to 5.

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Objectives: Mitral regurgitation (MR) is frequently observed in patients undergoing left ventricular assist device implantation. We investigated the impact of preoperative MR on left ventricular assist device patients.

Methods: A retrospective propensity score-matched analysis of adult patients enrolled in the EUROMACS registry between 1 January 2011 and 30 November 2021 was performed.

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A continuous-flow left ventricular assist device implant is a well-established therapy for patients with end-stage heart failure. Currently, the HeartMate 3 device is the only commercially available durable left ventricular assist device. Therefore, patients on HeartWare HVAD support who require a pump exchange must have a HeartMate 3 implanted.

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Minimally invasive aortic valve replacement has become a feasible approach to treat various aortic valve pathologies with limited procedural trauma. Several minimally invasive aortic valve replacement approaches with different levels of complexity and technical requirements are currently available.

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Temporary mechanical circulatory support (tMCS) is a life-saving treatment option for patients in cardiogenic shock (CS), but many aspects such as patient selection, initiation threshold and optimal modality selection remain unclear. This study describes a standard operating procedure (SOP) for tMCS allocation for CS patients and presents outcome data before and after implementation. Data from 421 patients treated for CS with tMCS between 2018 and 2021 were analyzed.

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Myocardial recovery occurs in approximately 5% of left ventricular assist device recipients. In selected patients, it is possible to electively perform left ventricular assist device explantation after accurate myocardial function recovery assessment. Several surgical approaches and techniques have been reported in the literature that focus on left ventricular assist device removal and preservation of left ventricular geometry.

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The introduction of the transcatheter aortic valve implantation procedure has revolutionized the standards of care in patients with aortic valve pathologies and has significantly increased the quality of the medical treatment provided. The durability and constant technical improvements in the modern transcatheter aortic valve implantation procedure have broadened the indications towards younger patient groups with low-risk profiles. Therefore, transcatheter aortic valve implantation now represents an effective alternative for surgical aortic valve replacement in a large number of cases.

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This paper presents the first transcatheter management of severe aortic regurgitation in a 77-year-old woman with a criss-cross heart-an extremely rare and complex congenital heart disease. The procedure achieved an elimination of aortic regurgitation and resulted in a remarkable improvement of the patient's physical condition. ().

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Over the past few decades, the field of minimally invasive cardiac surgery has significantly broadened. Novel surgical and endovascular techniques have been developed for the treatment of aortic valve pathologies. Surgical aortic valve replacement (SAVR) through a right antero-lateral (mini-)thoracotomy (RALT) has gained approval due to its limited postoperative trauma, faster rehabilitation and sufficient pain control.

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Minimally invasive mitral valve surgery has become a standardized and well-established approach to treat mitral valve disease and is associated with limited procedural trauma. Nevertheless, it remains a technically demanding procedure with a steep learning curve, and new manual skills need to be acquired. Various technical solutions have been adopted and implemented to overcome the challenges associated with this surgical technique.

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