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Jawaid O, Gaddy A, Omar HR, Guglin M. Ventricular Assist Devices and Chronic Kidney Replacement Therapy: Technology and Outcomes. Adv Chronic Kidney Dis 2021; 28:37-46. [PMID: 34389136 DOI: 10.1053/j.ackd.2021.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/12/2020] [Accepted: 01/04/2021] [Indexed: 11/11/2022]
Abstract
Heart failure and kidney failure are very common conditions, precipitating and exacerbating each other. Left ventricular assist devices (LVADs) represent a relatively new technology for treatment of advanced heart failure. Kidney dysfunction, if present, makes candidate selection for LVADs challenging and contributes to multiple complications while the patients are on an LVAD support. Although kidney function generally improves after LVAD implantation, some patients develop acute and then chronic kidney disease sometimes requiring kidney replacement therapies (KRTs). Overall, chronic KRT in LVAD recipients is feasible and well tolerated, but routine technique of blood pressure monitoring should be adjusted to the continuous blood flow. Both hemodialysis and peritoneal dialysis can be used. Unique challenges for chronic KRT posed by the presence of LVAD are discussed in this review.
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Thongprayoon C, Lertjitbanjong P, Cheungpasitporn W, Hansrivijit P, Fülöp T, Kovvuru K, Kanduri SR, Davis PW, Vallabhajosyula S, Bathini T, Watthanasuntorn K, Prasitlumkum N, Chokesuwattanaskul R, Ratanapo S, Mao MA, Kashani K. Incidence and impact of acute kidney injury on patients with implantable left ventricular assist devices: a Meta-analysis. Ren Fail 2020; 42:495-512. [PMID: 32434422 PMCID: PMC7301695 DOI: 10.1080/0886022x.2020.1768116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/04/2020] [Accepted: 05/05/2020] [Indexed: 02/07/2023] Open
Abstract
Background: We aimed to evaluate the acute kidney injury (AKI) incidence and its associated risk of mortality in patients with implantable left ventricular assist devices (LVAD).Methods: A systematic literature search in Ovid MEDLINE, EMBASE, and Cochrane Databases was conducted through January 2020 to identify studies that provided data on the AKI incidence and AKI-associated mortality risk in adult patients with implantable LVADs. Pooled effect estimates were examined using random-effects, generic inverse variance method of DerSimonian-Laird.Results: Fifty-six cohort studies with 63,663 LVAD patients were enrolled in this meta-analysis. The pooled incidence of reported AKI was 24.9% (95%CI: 20.1%-30.4%) but rose to 36.9% (95%CI: 31.1%-43.1%) when applying the standard definition of AKI per RIFLE, AKIN, and KDIGO criteria. The pooled incidence of severe AKI requiring renal replacement therapy (RRT) was 12.6% (95%CI: 10.5%-15.0%). AKI incidence did not differ significantly between types of LVAD (p = .35) or indication for LVAD use (p = .62). While meta-regression analysis did not demonstrate a significant association between study year and overall AKI incidence (p = .55), the study year was negatively correlated with the incidence of severe AKI requiring RRT (slope = -0.068, p < .001). The pooled odds ratios (ORs) of mortality at 30 days and one year in AKI patients were 3.66 (95% CI, 2.00-6.70) and 2.22 (95% CI, 1.62-3.04), respectively. The pooled ORs of mortality at 30 days and one year in severe AKI patients requiring RRT were 7.52 (95% CI, 4.58-12.33) and 5.41 (95% CI, 3.63-8.06), respectively.Conclusion: We found that more than one-third of LVAD patients develop AKI based on standard definitions, and 13% develop severe AKI requiring RRT. There has been a potential improvement in the incidence of severe AKI requiring RRT for LVAD patients. AKI in LVAD patients was associated with increased 30-day and 1 year mortality.
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Affiliation(s)
| | | | | | - Panupong Hansrivijit
- Department of Internal Medicine, University of Pittsburgh Medical Center Pinnacle, Harrisburg, PA, USA
| | - Tibor Fülöp
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, USA
- Medicine Service, Ralph H. Johnson VA Medical Center, Charleston, SC, USA
| | - Karthik Kovvuru
- Division of Nephrology, University of Mississippi Medical Center, Jackson, MS, USA
| | - Swetha R. Kanduri
- Division of Nephrology, University of Mississippi Medical Center, Jackson, MS, USA
| | - Paul W. Davis
- Division of Nephrology, University of Mississippi Medical Center, Jackson, MS, USA
| | | | - Tarun Bathini
- Department of Internal Medicine, University of Arizona, Tucson, Arizona, USA
| | | | | | | | - Supawat Ratanapo
- Division of Cardiology, Department of Medicine, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Michael A. Mao
- Division of Nephrology and Hypertension, Mayo Clinic Health System, Jacksonville, FL, USA
| | - Kianoush Kashani
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, USA
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Lukic B, Clark JB, Izer JM, Cooper TK, Finicle HA, Cysyk J, Doxtater B, Yeager E, Reibson J, Newswanger RK, Leibich P, Bletcher K, Weiss WJ. Chronic Ovine Studies Demonstrate Low Thromboembolic Risk in the Penn State Infant Ventricular Assist Device. ASAIO J 2020; 65:371-379. [PMID: 30681440 DOI: 10.1097/mat.0000000000000945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Mechanical circulatory support for children under 6 years of age remains a challenge. This article describes the preclinical status and the results of recent animal testing with the Penn State Infant Left Ventricular Assist Device (VAD). The objectives have been to 1) demonstrate acceptably low thromboembolic risk to support Food and Drug Administration approval, 2) challenge the device by using minimal to no anticoagulation in order to identify any design or manufacturing weaknesses, and 3) improve our understanding of device thrombogenicity in the ovine animal model, using multicomponent measurements of the coagulation system and renal ischemia quantification, in order to better correlate animal results with human results.The Infant VAD was implanted as a left VAD (LVAD) in 18-29 kg lambs. Twelve LVAD and five surgical sham animals were electively terminated after approximately 30 or 60 days. Anticoagulation was by unfractionated heparin targeting thromboelastography R times of 2x normal (n = 6) or 1x normal (n = 6) resulting in negligible heparin activity as measured by anti-Xa assay (<0.1 IU/ml). Platelet inhibitors were not used.There were no clinically evident strokes or evidence of end organ dysfunction in any of the 12 electively terminated LVAD studies. The degree of renal ischemic lesions in device animals was not significantly different than that found in five surgical sham studies, demonstrating minimal device thromboembolism.In summary, these results in a challenging animal test protocol support the conclusion that the Penn State Infant VAD has a low thromboembolic risk and may allow lower levels of anticoagulation.
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Affiliation(s)
- Branka Lukic
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - J Brian Clark
- Pediatric Cardiothoracic Surgery, The Pennsylvania State University, College of Medicine, Penn State Children's Hospital, Hershey, PA
| | - Jenelle M Izer
- Department of Comparative Medicine, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Timothy K Cooper
- Department of Comparative Medicine, The Pennsylvania State University, College of Medicine, Hershey, PA.,Present address: Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Fort Detrick, Frederick, Maryland
| | - Heidi A Finicle
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Johua Cysyk
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Bradly Doxtater
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Eric Yeager
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - John Reibson
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Raymond K Newswanger
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Patrick Leibich
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Kirby Bletcher
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - William J Weiss
- From the Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA.,Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA
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Abstract
The left ventricular assist device (LVAD) has become an established treatment option for patients with refractory heart failure. Many of these patients experience chronic kidney disease (CKD) due to chronic cardiorenal syndrome type II, which is often alleviated quickly following LVAD implantation. Nevertheless, reversibility of CKD remains difficult to predict. Interestingly, initial recovery of GFR appears to be transient, being followed by gradual but significant late decline. Nevertheless, GFR often remains elevated compared to preimplant status. Larger GFR increases are followed by a proportionally larger late decline. Several explanations for this gradual decline in renal function after LVAD therapy have been proposed, yet a definitive answer remains elusive. Mortality predictors of LVAD implantation are the occurrence of either postimplantation acute kidney injury (AKI) or preimplant CKD. However, patient outcomes continue to improve as LVAD therapy becomes more widespread, and adverse events including AKI appear to decline. In light of a growing destination therapy population, it is important to understand the cumulative effects of long-term LVAD support on kidney function. Additional research and passage of time are required to further unravel the intricate relationships between the LVAD and the kidney.
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Affiliation(s)
- T R Tromp
- University Medical Center Utrecht, POB 85500, 3508 GA, Utrecht, The Netherlands,
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