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Open research questions in Mechanical Circulatory Support Devices

34 unresolved questions extracted from the limitations and future-work sections of 205 Mechanical Circulatory Support Devices papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • ABSTRACT Purpose Weaning from venovenous extracorporeal membrane oxygenation (V‐V ECMO) remains unstandardized due to limited literature, with delayed weaning increasing the risk of vascular injury and multi‐organ failure.

    A High Granularity Machine Learning Model to Predict Successful Weaning During V‐V <scp>ECMO</scp> · 2026 · DOI

  • Currently, no standardized protocol exists specif- ically for evaluating cardiac function in ECMO-supported brain-dead donors. To better understand these trends, improvements in the specificity and granularity of data collection within the KONOS registry—particularly regarding detailed donor and recipient information—are warranted.

    Trends in the utilization of donor hearts with extracorporeal membrane oxygenation support in South Korea: an analysis of the Korean Network for Organ Sharing registry data · 2026 · DOI

  • While atrial fibrillation (AF) has received considerable attention in this population, the distinct hemodynamic impact of typical cavotricuspid isthmus (CTI)–dependent atrial flutter and the role of catheter-based rhythm control remain poorly characterized.

    Catheter ablation of typical atrial flutter in a patient with left ventricular assist device support: a case report · 2026 · DOI

  • Very limited studies have explored adjunctive ventilation strategies, including inhaled nitric oxide and defined oxygenation targets during V-A ECMO, exhibiting at least a moderate risk of bias.

    The effects of mechanical ventilation during v-a ecmo support: a systematic review · 2026 · DOI

  • • Automated pupillometry provides objective bedside assessment of pupillary reactivity, but its prognostic value in pediatric ECMO remains poorly defined.

    Automated pupillometry for the prediction of neurologic outcomes in children requiring extracorporeal membrane oxygenation (ECMO) · 2026 · DOI

  • Drug sequestration within the ECMO circuit has been reported; however, existing evidence is primarily based on ex vivo studies and small clinical series, resulting in conflicting findings with limited clinical applicability.

    Impact of extracorporeal membrane oxygenation on antimicrobial exposure in critically ill patients: a prospective observational study · 2026 · DOI

  • ABSTRACT Background The hemodynamic consequence of increasing veno‐arterial extracorporeal membrane oxygenator (V‐A ECMO) flow on left ventricular (LV) loading is controversial, with in vivo studies reporting conflicting results on left ventricular distension.

    Comparison of Left Ventricular Pressure‐Volume Loops With Veno‐Arterial Extracorporeal Membrane Oxygenator Support: In Vitro Investigation · 2026 · DOI

  • The transvalvular microaxial flow pump (mAFP) is increasingly used to unload the failing left ventricle (LV), yet the hemodynamic strategy to maximize unloading remains uncertain.

    Impact of Systemic Vessel Resistance and Microaxial Pump Flow Level on Left Ventricular Workload · 2026 · DOI

  • Introduction: Pediatric fellows and advanced practice providers face challenges in acquiring extracorporeal membrane oxygenation (ECMO) management skills due to low patient volume, high-risk cases, and lack of standardized training guidelines.

    Enhancing Pediatric Extracorporeal Membrane Oxygenation Education Through Process-Oriented Guided Inquiry Learning Sessions for Fellows and Advanced Practice Providers · 2026 · DOI

  • Future investigations should focus on validating bedside tools to assess CVAR and microcirculatory integrity, and on determining whether physiological targets derived from these measures can improve neurological outcomes in patients using MCS.

    Microcirculation and Cerebrovascular Autoregulation in Patients With Mechanical Circulatory Support Devices · 2026 · DOI

  • Although viscoelastic hemostatic assays (VHAs) provide a comprehensive assessment, discrepancy patterns between VHAs and conventional tests in V‐V ECMO patients remain unclear.

    Identification of Coagulation Phenotypes Using Viscoelastic and Conventional Assays During Veno‐Venous Extracorporeal Membrane Oxygenation: A Hierarchical Clustering Analysis · 2026 · DOI

  • This study had several limitations. First, this was a sin- gle-centre retrospective cohort study, and the number of patients was small; therefore, multivariate analysis was not performed. Consequently, the results might have limited generalizability. Second, ECG parameters might be useful only in patients with a sinus rhythm. In the present study, all patients had sinus rhythm; however, the use of P-wave parameters in patients with atrial fibrillation rhythm was not evaluated. Third, although we defined the deteriorated group as patients who died within 30 days of Impella implanta- tion, the longest duration of acute-phase mortality in this study was 15 days. Furthermore, in cases of death occurring at a later stage, the proportion attributable to non-cardiac causes is likely to increase; therefore, it is unclear whether the definition of “within 30 days” is entirely accurate, and we believe there are some limitations to the generalizability of these findings.

    Predictors of the need for escalation therapy in patients with cardiogenic shock treated with an Impella device: a novel approach using electrocardiography · 2026 · DOI

  • ECPella (ECMO + Impella) is increasingly used for cardio- genic shock from cancer-therapy–related cardiac dysfunc- tion. Newer fully magnetically levitated pumps reduce shear stress and lower rates of stroke, thrombosis, and GI bleeding. These advances are especially important for cancer patients, who already face high infection and bleeding risks. Progress in this field depends on close collaboration between oncol- ogy and heart-failure team, along with research focused on better anticoagulation strategies and patient selection to break down the traditional contraindication of active cancer for VAD support [13]. Acknowledgements No funding was received for this project.

    Mechanical circulatory support as a bridge to cancer therapy in patients with end stage heart failure: a single center experience · 2026 · DOI

  • Yet, specifics of embolus transport to the brain by the flow driven by an LVAD are poorly understood; precluding a clear understanding of post-implant stroke risks in these patients.

    Abstract WP228: Stroke Risk Quantification For Patients With A Left Ventricular Assist Device · 2023 · DOI

  • To date, there is limited evidence from observational studies supporting pharmacologic interventions to facilitate successful VA-ECMO weaning.

    Short- and Long-term Efficacy and Safety of Levosimendan in Veno-arterial Extracorporeal Membrane Oxygenation Weaning: The WEANILEVO Randomized Double-Blind Multicenter Trial · 2026 · DOI

  • Its application has broadened across a wide spectrum of critical illness, yet the mechanistic basis of its physiological benefit remains incompletely defined.

    Extracorporeal life support in adult critically ill patients: mechanisms of benefit in respiratory and cardiac failure · 2026 · DOI

  • However, the ideal time to begin vvECMO therapy, producing the least negative side effects and the best possible positive effect on disease progression and long-term outcomes, remains unknown.

    Early vs Late Initiation of Extracorporeal Membrane Oxygenation: Protocol for a Prospective, Randomized, Multicenter Study · 2026 · DOI

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34 open questions have been extracted from the limitations and future-work passages of 205 Mechanical Circulatory Support Devices papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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