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- (-) Cardiovascular Conditions (9)
- Decision Making (1)
- Disparities (1)
- Healthcare-Associated Infections (HAIs) (3)
- Healthcare Costs (2)
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- (-) Medical Devices (9)
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AHRQ Research Studies
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Research Studies is a compilation of published research articles funded by AHRQ or authored by AHRQ researchers.
Results
1 to 9 of 9 Research Studies DisplayedFunk RJ, Pagani FD, Hou H
Care fragmentation predicts 90-day durable ventricular assist device outcomes.
The purpose of this cohort study was to investigate the relationship between care fragmentation and in-hospital as well as 90-day post-operative outcomes for patients receiving durable ventricular assist device (VAD) implants. The research utilized Medicare claims connected to the Society of Thoracic Surgeons (STS) Interagency Registry for Mechanically Assisted Circulatory Support (Intermacs) for patients who underwent VAD implantation from July 2009 to April 2017. Medicare information was employed to assess the fragmentation of the multidisciplinary care delivery network at the treating hospital, based on the providers' patient-sharing history within the preceding year. The STS Intermacs database was utilized for risk adjustment and outcome determination. Hospitals were categorized into terciles according to the level of network fragmentation, measured by the average number of connections separating providers in the network. Multivariable regression analysis was conducted to examine the association between network fragmentation and the risk of death or infection within 90 days. The study included 5159 patients who received VAD implants, and found 11.2% mortality and 27.6% infection incidence within 90 days following implantation. After adjusting for confounders, a one-unit increase in network fragmentation correlated with a 0.179 rise in in-hospital infection probability and a 0.183 increase in the likelihood of 90-day infection. Comparable findings were observed in models assessing the number of in-hospital and 90-day infections. While network fragmentation was a predictor of 90-day mortality probability, this association was not significant after adjustment.
AHRQ-funded; HS026003
Citation: Funk RJ, Pagani FD, Hou H .
Care fragmentation predicts 90-day durable ventricular assist device outcomes.
Am J Manag Care 2022 Dec;28(12):e444-e51. doi: 10.37765/ajmc.2022.89280.
Keywords: Medical Devices, Heart Disease and Health, Cardiovascular Conditions
A Wehbe, RM Wu, T
AHRQ Author: Tibrewala
Hyponatremia is a powerful predictor of poor prognosis in left ventricular assist device patients.
Researchers sought to investigate the prognostic value of serum sodium in left ventricular assist device (LVAD) patients and whether hyponatremia reflects worsening heart failure or an alternative mechanism. Heart failure patients who had undergone LVAD implantation 2008-2019 were identified; the researchers assessed for differences in hyponatremia before and after implantation. The findings suggested that hyponatremia in LVAD patients was associated with a significantly higher risk of all-cause mortality and recurrent heart failure hospitalizations. The researchers concluded that hyponatremia may be a marker of ongoing neurohormonal activation more sensitive than other lab values, echocardiography parameters, and hemodynamic measurements.
AHRQ-funded; HS026385.
Citation: A Wehbe, RM Wu, T .
Hyponatremia is a powerful predictor of poor prognosis in left ventricular assist device patients.
ASAIO J 2022 Dec;68(12):1475-82. doi: 10.1097/mat.0000000000001691.
Keywords: Medical Devices, Heart Disease and Health, Cardiovascular Conditions
Marcaccio CL, O'Donnell TFX, Dansey KD
Disparities in reporting and representation by sex, race, and ethnicity in endovascular aortic device trials.
The purpose of this study was to examine the demographics of patients enrolled in critical U.S. endovascular aortic device trials to explore the representation of vulnerable populations, including women and racial and ethnic minorities. The primary outcomes included the percentage of trials reporting participant sex, race, and ethnicity and the percentage of participants across sex, racial, and ethnic groups. The study found that the Food and Drug Administration (FDA) provided 29 approvals from 29 trials of 24 devices with a total of 4046 patients: 52% (15) were EVAR devices, 41% (12) were TEVAR devices, and 3.4% (1) was a FEVAR device, with 1 dissection stent (3.4%). Fifty-two percent of the trials reported the three most common racial groups (White, Black, Asian), and 48% reported Hispanic ethnicity. The TEVAR trials were the most likely to report all three racial groups and Hispanic ethnicity (92% and 75%, respectively), while the EVAR trials had the lowest reporting rates (13% and 20%, respectively). The median female enrollment was 21%, with the EVAR trials having the lowest female enrollment compared with 41% in the TEVAR trials, 21% in the FEVAR trial, and 34% in the dissection stent trial. The study concluded that in critical aortic device trials that led to FDA approval, female patients were underrepresented, especially for EVAR, and racial and ethnic minority groups were under-represented and underreported.
AHRQ-funded; HS027285.
Citation: Marcaccio CL, O'Donnell TFX, Dansey KD .
Disparities in reporting and representation by sex, race, and ethnicity in endovascular aortic device trials.
J Vasc Surg 2022 Nov;76(5):1244-52.e2. doi: 10.1016/j.jvs.2022.05.003..
Keywords: Disparities, Racial and Ethnic Minorities, Heart Disease and Health, Cardiovascular Conditions, Medical Devices, Sex Factors
Likosky DS, Yang G, Zhang M
Interhospital variability in health care-associated infections and payments after durable ventricular assist device implant among Medicare beneficiaries.
The purpose of this study was to examine differences in durable ventricular assist device implantation infection rates and associated costs across hospitals. The researchers utilized clinical data for 8,688 patients who received primary durable ventricular assist devices from the Society of Thoracic Surgeons Interagency Registry for Mechanically Assisted Circulatory Support (Intermacs) hospitals (n = 120) and merged that data with post-implantation 90-day Medicare claims. The primary outcome included infections within 90 days of implantation and Medicare payments. The study found that 27.8% of patients developed 3982 identified infections. The median adjusted incidence of infections (per 100 patient-months) across hospitals was 14.3 and differed according to hospital. Total Medicare payments from implantation to 90 days were 9.0% more in high versus low infection tercile hospitals. The researchers concluded that health-care-associated infection rates post durable ventricular assist device implantation varied according to hospital and were associated with increased 90-day Medicare expenditures.
AHRQ-funded; HS026003.
Citation: Likosky DS, Yang G, Zhang M .
Interhospital variability in health care-associated infections and payments after durable ventricular assist device implant among Medicare beneficiaries.
J Thorac Cardiovasc Surg 2022 Nov;164(5):1561-68. doi: 10.1016/j.jtcvs.2021.04.074..
Keywords: Healthcare-Associated Infections (HAIs), Medical Devices, Medicare, Heart Disease and Health, Cardiovascular Conditions, Hospitals, Payment, Healthcare Costs
Yang G, Zhang M, Zhou S
Incompleteness of health-related quality of life assessments before left ventricular assist device implant: a novel quality metric.
Investigators hypothesized that pre-implant health-related quality of life (HRQOL) incompleteness in The Society of Thoracic Surgeons' Intermacs registry for patients undergoing left ventricular assist device (LVAD) implantation predicts 90-day outcomes. They found that HRQOL incompleteness at high-rate hospitals was more often due to administrative reasons and less likely due to patient reasons. Increases in the adjusted pre-implant incompleteness rates were significantly associated with higher risk of infection-related mortality, infection, and renal dysfunction. They concluded that hospital adjusted pre-implant HRQOL incompleteness was predictive of 90-day post-implant outcomes and may serve as a novel quality metric.
AHRQ-funded; HS026003.
Citation: Yang G, Zhang M, Zhou S .
Incompleteness of health-related quality of life assessments before left ventricular assist device implant: a novel quality metric.
J Heart Lung Transplant 2022 Oct;41(10):1520-28. doi: 10.1016/j.healun.2022.07.001..
Keywords: Quality of Life, Medical Devices, Heart Disease and Health, Cardiovascular Conditions
Kim KD, Funk RJ, Hou H
Association between care fragmentation and total spending after durable left ventricular device implant: a mediation analysis of health care-associated infections within a national Medicare-Society of Thoracic Surgeons INTERMACS linked dataset.
The purpose of this study was to examine the relationship between care fragmentation and total spending for durable left ventricular assisted device (LVAD) implant, and whether this relationship is mediated by infections. The researchers developed a measure of care fragmentation based on the number of shared medical professionals providing care to 4,987 Medicare beneficiaries undergoing LVAD implantation. The study found that the indirect effect of care fragmentation, through infections, was positive and statistically significant. The researchers concluded that higher care fragmentation associated with durable LVAD implantation is related with a greater incidence of infections and higher Medicare beneficiary payments.
AHRQ-funded; HS026003.
Citation: Kim KD, Funk RJ, Hou H .
Association between care fragmentation and total spending after durable left ventricular device implant: a mediation analysis of health care-associated infections within a national Medicare-Society of Thoracic Surgeons INTERMACS linked dataset.
Circ Cardiovasc Qual Outcomes 2022 Sep;15(9):e008592. doi: 10.1161/circoutcomes.121.008592..
Keywords: Heart Disease and Health, Cardiovascular Conditions, Healthcare Costs, Healthcare-Associated Infections (HAIs), Medicare, Medical Devices, Healthcare Delivery
Pienta MJ, Shore S, Watt TMF
Patient factors associated with left ventricular assist device infections: a scoping review.
This article is a scoping review that systematically summarized all existing studies examining patient-related factors associated with infections after left ventricular assist device (LVAD) implantation. Studies published between January 2006 and February 2019 were used, with 31 studies meeting inclusion criteria. All included studies were observational, and 17 focused on driveline infections. Other factors most commonly studied included body composition (n = 8), diabetes and other comorbidities (n = 8), and psychosocial/socio-economic factors (n = 6). Studies were frequently single-center, and patient race and sex did not correlate with infection risk. There was also no consistent association noted between obesity, diabetes, or psychosocial/socio-economic factors and LVAD recipient infections. Two studies did report a significant association between malnutrition and hypoalbuminemia and post implant infections.
AHRQ-funded; HS026003.
Citation: Pienta MJ, Shore S, Watt TMF .
Patient factors associated with left ventricular assist device infections: a scoping review.
J Heart Lung Transplant 2022 Apr; 41(4):425-33. doi: 10.1016/j.healun.2022.01.011..
Keywords: Medical Devices, Healthcare-Associated Infections (HAIs), Heart Disease and Health, Cardiovascular Conditions
Rao BR, Merchant FM, Abernethy ER
The impact of government-mandated shared decision-making for implantable defibrillators: a natural experiment.
This study examined the impact of the 2018 Centers for Medicare and Medicaid Services (CMS) mandate that patients considering implantation of an implantable cardioverter-defibrillator (ICD) for primary prevention of sudden cardiac death undergo shared decision-making (SDM) using a decision-aid. The authors surveyed patients who underwent implantation of a primary prevention ICD within the Emory Healthcare system between 2017-2019 (pre and post SDM mandate). Survey domains included decisional conflict, knowledge about the ICD, values-choice concordance, and engagement in decision-making. Of 101 patients who completed the survey, 45 had an ICD placed before the mandate and 56 placed after. No major differences were found between any of the survey domains. Patients with ICDs after the mandate were more likely to subjectively feel more informed about the benefits of the procedure but were less likely to be able to correctly identify the frequency of complications.
AHRQ-funded; HS028558.
Citation: Rao BR, Merchant FM, Abernethy ER .
The impact of government-mandated shared decision-making for implantable defibrillators: a natural experiment.
Pacing Clin Electrophysiol 2022 Feb; 45(2):274-80. doi: 10.1111/pace.14414..
Keywords: Decision Making, Medical Devices, Policy, Cardiovascular Conditions
Shore S, Pienta MJ, Watt TMF
Non-patient factors associated with infections in LVAD recipients: a scoping review.
Infections are the most common complication in recipients of durable left ventricular assist devices (LVAD) and are associated with increased morbidity, mortality, and expenditures. The existing literature examining factors associated with infection in LVAD recipients is limited and principally comprises single-center studies. This scoping review synthesized all available evidence related to identifying modifiable, non-patient factors associated with infections among LVAD recipients.
AHRQ-funded; HS026003.
Citation: Shore S, Pienta MJ, Watt TMF .
Non-patient factors associated with infections in LVAD recipients: a scoping review.
J Heart Lung Transplant 2022 Jan;41(1):1-16. doi: 10.1016/j.healun.2021.10.006..
Keywords: Heart Disease and Health, Cardiovascular Conditions, Surgery, Medical Devices