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The Long-Term Survival of LVAD Patients-A TriNetX Database Analysis
Nandini Nair1, Balakrishnan Mahesh2, Dongping Du3
1Department of Medicine, Division of Cardiology, Penn State Health/PSUCOM, 500 University Drive, Hershey, PA 17033, USA.
Insights
Long-term survival for patients with continuous-flow left ventricular assist devices (CF-LVADs) is impacted by various factors. Identifying these risks, such as infections and comorbidities, can improve patient outcomes.
Area of Science:
- Cardiology
- Medical Devices
- Public Health
Background:
- Heart transplantation is limited by donor availability, increasing reliance on continuous-flow left ventricular assist devices (CF-LVADs) for end-stage heart failure.
- Long-term survival data for CF-LVAD recipients is crucial for managing end-stage heart failure.
- Investigating factors influencing long-term outcomes in CF-LVAD patients is essential.
Purpose of the Study:
- To assess the impact of demographics, infections, comorbidities, cardiomyopathies, arrhythmias, and end-organ dysfunction on long-term survival in CF-LVAD recipients.
- To identify specific risk factors and potential protective elements affecting survival post-LVAD implantation.
- To provide a comprehensive long-term survival analysis for the CF-LVAD population.
Main Methods:
- Utilized the TriNetX de-identified patient database for comprehensive data analysis.
- Employed log-rank tests to evaluate post-implant survival.
- Conducted univariate Cox regression analysis to determine Hazard Ratios (HR) for various factors, using Python and the lifelines library.
Main Results:
- Identified Cytomegalovirus (CMV), hepatitis A exposure, atrial fibrillation, paroxysmal ventricular tachycardia, ischemic cardiomyopathy, renal dysfunction, diabetes, COPD, mitral valve disease, and essential hypertension as significant risk factors for long-term survival.
- Observed a potentially protective effect of hypokalemia on long-term survival.
- Found no significant impact of gender on long-term survival outcomes.
Conclusions:
- This study provides the first detailed long-term survival assessment of the CF-LVAD population utilizing a de-identified database.
- Specific infections, comorbidities, and end-organ dysfunction significantly influence long-term survival in CF-LVAD recipients.
- Further research into the protective mechanisms of hypokalemia and mitigation strategies for identified risk factors is warranted.
Abstract:
Background: Donor shortage limits the utilization of heart transplantation, making it available for only a fraction of the patients on the transplant waiting list. Therefore, continuous-flow left ventricular assist devices (CF-LVADs) have evolved as a standard of care for end-stage heart failure. It is imperative therefore to investigate long-term survival in this population. Methods: This study assesses the impact of demographics, infections, comorbidities, types of cardiomyopathies, arrhythmias, and end-organ dysfunction on the long-term survival of LVAD recipients. The TriNetX database comprises de-identified patient information across healthcare organizations. The log-rank test assessed post-implant survival effects, while Cox regression was used in the univariate analysis to obtain the Hazard Ratio (HR). All analyses were conducted using the Python programming language and the lifelines library. Results: This study identified CMV, hepatitis A exposure, atrial fibrillation, paroxysmal ventricular tachycardia, ischemic cardiomyopathy, renal dysfunction, diabetes, COPD, mitral valve disease, and essential hypertension as risk factors that impact long-term survival. Interestingly, hypokalemia seems to have a protective effect and gender does not affect survival significantly. Conclusions: This is the first report of a detailed long-term survival assessment of the LVAD population using a decoded database.
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