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Mauz JB, Rieland H, Berliner D, Tiede A, Stockhoff L, Hinrichs JB, Wedemeyer H, Meyer BC, Olsson KM, Maasoumy B, Tergast TL. High Prevalence and Clinical Relevance of Intrapulmonary Vascular Dilatations in Patients Undergoing TIPS Implantation. Clin Gastroenterol Hepatol 2024; 22:1867-1877.e4. [PMID: 38729401 DOI: 10.1016/j.cgh.2024.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 04/06/2024] [Accepted: 04/11/2024] [Indexed: 05/12/2024]
Abstract
BACKGROUND & AIMS Considerate patient selection is vital to ensure the best possible outcomes after transjugular intrahepatic portosystemic shunt (TIPS) insertion. However, data regarding the impact of intrapulmonary vascular dilatations (IPVDs) or hepatopulmonary syndrome (HPS) on the clinical course after TIPS implantation is lacking. Hence, this study aimed to investigate the relevance of IPVD and HPS in patients undergoing TIPS implantation. METHODS Contrast enhanced echocardiography and blood gas analysis were utilized to determine presence of IPVD and HPS. Multivariable competing risk analyses were performed to evaluate cardiac decompensation (CD), hepatic decompensation (HD), and liver transplant (LTx)-free survival within 1 year of follow-up. RESULTS Overall, 265 patients were included, of whom 136 had IPVD and 71 fulfilled the HPS criteria. Patients with IPVD had lower Freiburg index of post-TIPS survival (FIPS) scores, lower creatinine, and more often received TIPS because of variceal bleeding. Presence of IPVD was associated with a significantly higher incidence of CD (hazard ratio [HR], 1.756; 95% confidence interval [CI], 1.011-3.048; P = .046) and HD (HR, 1.841; 95% CI, 1.255-2.701; P = .002). However, LTx-free survival was comparable between patients with and without IPVD (HR, 1.081; 95% CI, 0.630-1.855; P = .780). Patients with HPS displayed a trend towards more CD (HR, 1.708; 95% CI, 0.935-3.122; P = .082) and HD (HR, 1.458; 95% CI, 0.934-2.275; P = .097) that failed to reach statistical significance. LTx-free survival did not differ in those with HPS compared with patients without HPS, respectively (HR, 1.052; 95% CI, 0.577-1.921; P = .870). CONCLUSION Screening for IPVD before TIPS implantation could help to further identify patients at higher risk of CD and HD.
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Affiliation(s)
- Jim B Mauz
- Hannover Medical School, Department of Gastroenterology, Hepatology, Infectious Diseases, and Endocrinology, Hannover, Germany
| | - Hannah Rieland
- Hannover Medical School, Department of Gastroenterology, Hepatology, Infectious Diseases, and Endocrinology, Hannover, Germany
| | - Dominik Berliner
- Hannover Medical School, Department of Cardiology and Angiology, Hannover, Germany
| | - Anja Tiede
- Hannover Medical School, Department of Gastroenterology, Hepatology, Infectious Diseases, and Endocrinology, Hannover, Germany; German Center for Infection Research (DZIF), Hannover-Braunschweig, Germany
| | - Lena Stockhoff
- Hannover Medical School, Department of Gastroenterology, Hepatology, Infectious Diseases, and Endocrinology, Hannover, Germany
| | - Jan B Hinrichs
- St Bernward Hospital, Department of Radiology, Hildesheim, Germany
| | - Heiner Wedemeyer
- Hannover Medical School, Department of Gastroenterology, Hepatology, Infectious Diseases, and Endocrinology, Hannover, Germany; German Center for Infection Research (DZIF), Hannover-Braunschweig, Germany; Excellence Cluster Resist, Hannover Medical School, Hannover, Germany
| | - Bernhard C Meyer
- Hannover Medical School, Department of Diagnostic and Interventional Radiology, Hannover, Germany
| | - Karen M Olsson
- Hannover Medical School, Department of Respiratory Medicine and Infectious Diseases, Hannover, Germany; German Center for Lung Research (DZL), Hannover, Germany
| | - Benjamin Maasoumy
- Hannover Medical School, Department of Gastroenterology, Hepatology, Infectious Diseases, and Endocrinology, Hannover, Germany; German Center for Infection Research (DZIF), Hannover-Braunschweig, Germany.
| | - Tammo L Tergast
- Hannover Medical School, Department of Gastroenterology, Hepatology, Infectious Diseases, and Endocrinology, Hannover, Germany.
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Gananandan K, Wiese S, Møller S, Mookerjee RP. Cardiac dysfunction in patients with cirrhosis and acute decompensation. Liver Int 2024; 44:1832-1841. [PMID: 38712826 DOI: 10.1111/liv.15896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 02/25/2024] [Accepted: 03/04/2024] [Indexed: 05/08/2024]
Abstract
The prevalence of cirrhotic cardiomyopathy (CCM) has been reported as high as 60%-70% in patients with liver cirrhosis and is associated with various negative outcomes. There has been a growing understanding of CCM over recent years. Indeed, the development of imaging techniques has enabled new diagnostic criteria to be proposed by the Cirrhotic Cardiomyopathy Consortium. However, important unanswered questions remain over pathophysiological mechanisms, optimal diagnostic modalities and potential treatment options. While there has been an increasing volume of literature evaluating CCM, there is a lack of clarity on its implications in acute decompensation, acute-on-chronic liver failure and following interventions such as transjugular intrahepatic portosystemic shunt insertion and liver transplantation. This review aims to summarise the literature in these challenging domains and suggest where future research should focus. We conclude that systemic inflammation and structural myocardial changes are likely to be crucial in the pathophysiology of the disease, but the relative contribution of different components remains elusive. Furthermore, future studies need to use standardised diagnostic criteria for CCM as well as incorporate newer imaging techniques assessing both myocardial structure and function. Finally, while specific treatments are currently lacking, therapeutics targeting systemic inflammation, microbial dysbiosis and bacterial translocation are promising targets and warrant further research.
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Affiliation(s)
- Kohilan Gananandan
- Liver Failure Group, Institute for Liver and Digestive Health, University College London, London, UK
| | - Signe Wiese
- Centre of Functional Imaging and Research, Department of Clinical Physiology and Nuclear Medicine, University of Copenhagen, Copenhagen, Denmark
- Gastroenterology Unit, Medical Division, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Søren Møller
- Centre of Functional Imaging and Research, Department of Clinical Physiology and Nuclear Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Rajeshwar P Mookerjee
- Liver Failure Group, Institute for Liver and Digestive Health, University College London, London, UK
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
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3
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Nadim MK, Kellum JA, Forni L, Francoz C, Asrani SK, Ostermann M, Allegretti AS, Neyra JA, Olson JC, Piano S, VanWagner LB, Verna EC, Akcan-Arikan A, Angeli P, Belcher JM, Biggins SW, Deep A, Garcia-Tsao G, Genyk YS, Gines P, Kamath PS, Kane-Gill SL, Kaushik M, Lumlertgul N, Macedo E, Maiwall R, Marciano S, Pichler RH, Ronco C, Tandon P, Velez JCQ, Mehta RL, Durand F. Acute kidney injury in patients with cirrhosis: Acute Disease Quality Initiative (ADQI) and International Club of Ascites (ICA) joint multidisciplinary consensus meeting. J Hepatol 2024; 81:163-183. [PMID: 38527522 PMCID: PMC11193657 DOI: 10.1016/j.jhep.2024.03.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 02/28/2024] [Accepted: 03/07/2024] [Indexed: 03/27/2024]
Abstract
Patients with cirrhosis are prone to developing acute kidney injury (AKI), a complication associated with a markedly increased in-hospital morbidity and mortality, along with a risk of progression to chronic kidney disease. Whereas patients with cirrhosis are at increased risk of developing any phenotype of AKI, hepatorenal syndrome (HRS), a specific form of AKI (HRS-AKI) in patients with advanced cirrhosis and ascites, carries an especially high mortality risk. Early recognition of HRS-AKI is crucial since administration of splanchnic vasoconstrictors may reverse the AKI and serve as a bridge to liver transplantation, the only curative option. In 2023, a joint meeting of the International Club of Ascites (ICA) and the Acute Disease Quality Initiative (ADQI) was convened to develop new diagnostic criteria for HRS-AKI, to provide graded recommendations for the work-up, management and post-discharge follow-up of patients with cirrhosis and AKI, and to highlight priorities for further research.
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Affiliation(s)
- Mitra K Nadim
- Division of Nephrology and Hypertension, Keck School of Medicine, University of Southern California, Los Angeles, USA
| | - John A Kellum
- Center for Critical Care Nephrology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Lui Forni
- School of Medicine, University of Surrey and Critical Care Unit, Royal Surrey Hospital Guildford UK
| | - Claire Francoz
- Hepatology & Liver Intensive Care, Hospital Beaujon, Clichy, Paris, France
| | | | - Marlies Ostermann
- King's College London, Guy's & St Thomas' Hospital, Department of Critical Care, London, UK
| | - Andrew S Allegretti
- Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Javier A Neyra
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jody C Olson
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Salvatore Piano
- Unit of Internal Medicine and Hepatology, Department of Medicine - DIMED, University and Hospital of Padova, Padova, Italy
| | - Lisa B VanWagner
- Division of Digestive and Liver Diseases, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Elizabeth C Verna
- Division of Digestive and Liver Diseases, Columbia University, New York, NY, USA
| | - Ayse Akcan-Arikan
- Department of Pediatrics, Divisions of Critical Care Medicine and Nephrology, Baylor College of Medicine, Houston, TX, USA
| | - Paolo Angeli
- Unit of Internal Medicine and Hepatology, University and Teaching Hospital of Padua, Italy
| | - Justin M Belcher
- Section of Nephrology, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA; VA Connecticut Healthcare System, West Haven, CT, USA
| | - Scott W Biggins
- Division of Gastroenterology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Akash Deep
- Pediatric Intensive Care Unit, King's College Hospital, London, UK
| | - Guadalupe Garcia-Tsao
- Digestive Diseases Section, Yale University School of Medicine, New Haven, CT, USA; VA Connecticut Healthcare System, West Haven, CT, USA
| | - Yuri S Genyk
- Division of Abdominal Organ Transplantation and Hepatobiliary Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA; Division of Abdominal Organ Transplantation at Children's Hospital of Los Angeles, Los Angeles, CA, USA
| | - Pere Gines
- Liver Unit, Hospital Clínic de Barcelona, University of Barcelona, Institut d'Investigacions Biomèdiques August Pi-Sunyer and Ciber de Enfermedades Hepàticas y Digestivas, Barcelona, Catalonia, Spain
| | - Patrick S Kamath
- Division of Gastroenterology and Hepatology Mayo Clinic College of Medicine and Science, Rochester, MN, USA
| | - Sandra L Kane-Gill
- Department of Pharmacy and Therapeutics, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA
| | - Manish Kaushik
- Department of Renal Medicine, Singapore General Hospital, Singapore
| | - Nuttha Lumlertgul
- Excellence Centre in Critical Care Nephrology and Division of Nephrology, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Bangkok, Thailand
| | - Etienne Macedo
- Division of Nephrology, Department of Medicine, University of California San Diego, CA, USA
| | - Rakhi Maiwall
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
| | | | - Raimund H Pichler
- Division of Nephrology, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Claudio Ronco
- International Renal Research Institute of Vicenza, Department of Nephrology, Dialysis and Transplantation, San Bortolo Hospital, Vicenza-Italy
| | - Puneeta Tandon
- Division of Gastroenterology (Liver Unit), University of Alberta, Edmonton, Alberta, Canada
| | - Juan-Carlos Q Velez
- Department of Nephrology, Ochsner Health, New Orleans, LA, USA; Ochsner Clinical School, The University of Queensland, Brisbane, QLD, Australia
| | - Ravindra L Mehta
- Division of Nephrology-Hypertension, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - François Durand
- Hepatology & Liver Intensive Care, Hospital Beaujon, Clichy, Paris, France; University Paris Cité, Paris, France.
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4
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Pu Y, Luo Y. Acute kidney injury in patients with cirrhosis: A bibliometric analysis based on web of science. Asian J Surg 2024:S1015-9584(24)00931-X. [PMID: 38760205 DOI: 10.1016/j.asjsur.2024.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 05/03/2024] [Indexed: 05/19/2024] Open
Affiliation(s)
- Yang Pu
- Department of Medical Ultrasound, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan Province, China
| | - Yan Luo
- Department of Medical Ultrasound, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan Province, China.
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5
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Premkumar M, Kajal K, Reddy KR, Izzy M, Kulkarni AV, Duseja AK, Sihag KB, Divyaveer S, Gupta A, Taneja S, De A, Verma N, Rathi S, Bhujade H, Chaluvashetty SB, Roy A, Kumar V, Siddhartha V, Singh V, Bahl A. Evaluation of terlipressin-related patient outcomes in hepatorenal syndrome-acute kidney injury using point-of-care echocardiography. Hepatology 2024; 79:1048-1064. [PMID: 37976391 DOI: 10.1097/hep.0000000000000691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 10/27/2023] [Indexed: 11/19/2023]
Abstract
BACKGROUND AND AIMS Treatment of hepatorenal syndrome-acute kidney injury (HRS-AKI), with terlipressin and albumin, provides survival benefits, but may be associated with cardiopulmonary complications. We analyzed the predictors of terlipressin response and mortality using point-of-care echocardiography (POC-Echo) and cardiac and renal biomarkers. APPROACH Between December 2021 and January 2023, patients with HRS-AKI were assessed with POC-Echo and lung ultrasound within 6 hours of admission, at the time of starting terlipressin (48 h), and at 72 hours. Volume expansion was done with 20% albumin, followed by terlipressin infusion. Clinical data, POC-Echo data, and serum biomarkers were prospectively collected. Cirrhotic cardiomyopathy (CCM) was defined per 2020 criteria. RESULTS One hundred and forty patients were enrolled (84% men, 59% alcohol-associated disease, mean MELD-Na 25±SD 5.6). A median daily dose of infused terlipressin was 4.3 (interquartile range: 3.9-4.6) mg/day; mean duration 6.4 ± SD 1.9 days; the complete response was in 62% and partial response in 11%. Overall mortality was 14% and 16% at 30 and 90 days, respectively. Cutoffs for prediction of terlipressin nonresponse were cardiac variables [ratio of early mitral inflow velocity and mitral annular early diastolic tissue doppler velocity > 12.5 (indicating increased left filling pressures, C-statistic: 0.774), tissue doppler mitral velocity < 7 cm/s (indicating impaired relaxation; C-statistic: 0.791), > 20.5% reduction in cardiac index at 72 hours (C-statistic: 0.885); p < 0.001] and pretreatment biomarkers (CysC > 2.2 mg/l, C-statistic: 0.640 and N-terminal proBNP > 350 pg/mL, C-statistic: 0.655; p <0.050). About 6% of all patients with HRS-AKI and 26% of patients with CCM had pulmonary edema. The presence of CCM (adjusted HR 1.9; CI: 1.8-4.5, p = 0.009) and terlipressin nonresponse (adjusted HR 5.2; CI: 2.2-12.2, p <0.001) were predictors of mortality independent of age, sex, obesity, DM-2, etiology, and baseline creatinine. CONCLUSIONS CCM and reduction in cardiac index, reliably predict terlipressin nonresponse. CCM is independently associated with poor survival in HRS-AKI.
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Affiliation(s)
- Madhumita Premkumar
- Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Kamal Kajal
- Department of Anesthesia and Intensive Care, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - K Rajender Reddy
- Department of Medicine, Division of Gastroenterology and Hepatology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Manhal Izzy
- Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University, Nashville, Tennessee, USA
| | - Anand V Kulkarni
- Department of Hepatology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Ajay Kumar Duseja
- Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - K Bhupendra Sihag
- Department of Cardiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Smita Divyaveer
- Department of Nephrology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Ankur Gupta
- Department of Cardiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Sunil Taneja
- Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Arka De
- Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Nipun Verma
- Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Sahaj Rathi
- Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Harish Bhujade
- Radiodiagnosis and Interventional Radiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Sreedhara B Chaluvashetty
- Radiodiagnosis and Interventional Radiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Akash Roy
- Department of Hepatology, Apollo Hospital, Kolkata, India
| | - Vishesh Kumar
- Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Vuppada Siddhartha
- Department of Cardiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Virendra Singh
- Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Ajay Bahl
- Department of Cardiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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6
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Velez JCQ, Latt N, Rodby RA. Pathophysiology of Hepatorenal Syndrome. ADVANCES IN KIDNEY DISEASE AND HEALTH 2024; 31:87-99. [PMID: 38649221 DOI: 10.1053/j.akdh.2024.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 12/17/2023] [Accepted: 01/02/2024] [Indexed: 04/25/2024]
Abstract
Hepatorenal syndrome type 1 (HRS-1) is a unique form of acute kidney injury that affects individuals with decompensated cirrhosis with ascites. The primary mechanism leading to reduction of kidney function in HRS-1 is hemodynamic in nature. Cumulative evidence points to a cascade of events that led to a profound reduction in kidney perfusion. A state of increased intrahepatic vascular resistance characteristic of advanced cirrhosis and portal hypertension is accompanied by maladaptive peripheral arterial vasodilation and reduction in systemic vascular resistance and mean arterial pressure. As a result of a fall in effective arterial blood volume, there is a compensatory activation of the sympathetic nervous system and the renin-angiotensin system, local renal vasoconstriction, loss of renal autoregulation, decrease in renal blood flow, and ultimately a fall in glomerular filtration rate. Systemic release of nitric oxide stimulated by the fibrotic liver, bacterial translocation, and inflammation constitute key components of the pathogenesis. While angiotensin II and noradrenaline remain the critical mediators of renal arterial and arteriolar vasoconstriction, other novel molecules have been recently implicated. Although the above-described mechanistic pathway remains the backbone of the pathogenesis of HRS-1, other noxious elements may be present in advanced cirrhosis and likely contribute to the renal impairment. Direct liver-kidney crosstalk via the hepatorenal sympathetic reflex can further reduce renal blood flow independently of the systemic derangements. Tense ascites may lead to intraabdominal hypertension and abdominal compartment syndrome. Cardio-hemodynamic processes have also been increasingly recognized. Porto-pulmonary hypertension, cirrhotic cardiomyopathy, and abdominal compartment syndrome may lead to renal congestion and complicate the course of HRS-1. In addition, a degree of ischemic or toxic (cholemic) tubular injury may overlap with the underlying circulatory dysfunction and further exacerbate the course of acute kidney injury. Improving our understanding of the pathogenesis of HRS-1 may lead to improvements in therapeutic options for this seriously ill population.
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Affiliation(s)
- Juan Carlos Q Velez
- Department of Nephrology, Ochsner Health, New Orleans, LA; Ochsner Clinical School, The University of Queensland, Brisbane, QLD, Australia.
| | - Nyan Latt
- Virtua Center for Liver Disease, Virtua Health, Toms River, NJ
| | - Roger A Rodby
- Division of Nephrology, Rush University School of Medicine, Chicago, IL
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Selby NM, Francis ST. Assessment of Acute Kidney Injury using MRI. J Magn Reson Imaging 2024. [PMID: 38334370 DOI: 10.1002/jmri.29281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 02/10/2024] Open
Abstract
There has been growing interest in using quantitative magnetic resonance imaging (MRI) to describe and understand the pathophysiology of acute kidney injury (AKI). The ability to assess kidney blood flow, perfusion, oxygenation, and changes in tissue microstructure at repeated timepoints is hugely appealing, as this offers new possibilities to describe nature and severity of AKI, track the time-course to recovery or progression to chronic kidney disease (CKD), and may ultimately provide a method to noninvasively assess response to new therapies. This could have significant clinical implications considering that AKI is common (affecting more than 13 million people globally every year), harmful (associated with short and long-term morbidity and mortality), and currently lacks specific treatments. However, this is also a challenging area to study. After the kidney has been affected by an initial insult that leads to AKI, complex coexisting processes ensue, which may recover or can progress to CKD. There are various preclinical models of AKI (from which most of our current understanding derives), and these differ from each other but more importantly from clinical AKI. These aspects are fundamental to interpreting the results of the different AKI studies in which renal MRI has been used, which encompass different settings of AKI and a variety of MRI measures acquired at different timepoints. This review aims to provide a comprehensive description and interpretation of current studies (both preclinical and clinical) in which MRI has been used to assess AKI, and discuss future directions in the field. LEVEL OF EVIDENCE: 1 TECHNICAL EFFICACY: Stage 3.
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Affiliation(s)
- Nicholas M Selby
- Centre for Kidney Research and Innovation, Academic Unit for Translational Medical Sciences, School of Medicine, University of Nottingham, Nottingham, UK
- Department of Renal Medicine, University Hospitals of Derby and Burton NHS Foundation Trust, Derby, UK
| | - Susan T Francis
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, UK
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust and The University of Nottingham, Nottingham, UK
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8
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Wu HHL, Rakisheva A, Ponnusamy A, Chinnadurai R. Hepatocardiorenal syndrome in liver cirrhosis: Recognition of a new entity? World J Gastroenterol 2024; 30:128-136. [PMID: 38312119 PMCID: PMC10835518 DOI: 10.3748/wjg.v30.i2.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/05/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Emerging evidence and perspectives have pointed towards the heart playing an important role in hepatorenal syndrome (HRS), outside of conventional understanding that liver cirrhosis is traditionally considered the sole origin of a cascade of pathophysiological mechanisms directly affecting the kidneys in this context. In the absence of established heart disease, cirrhotic cardiomyopathy may occur more frequently in those with liver cirrhosis and kidney disease. It is a specific form of cardiac dysfunction characterized by blunted contractile responsiveness to stress stimuli and altered diastolic relaxation with electrophysiological abnormalities. Despite the clinical description of these potential cardiac-related complications of the liver, the role of the heart has traditionally been an overlooked aspect of circulatory dysfunction in HRS. Yet from a physiological sense, temporality (prior onset) of cardiorenal interactions in HRS and positive effects stemming from portosystemic shunting demonstrated an important role of the heart in the development and progression of kidney dysfunction in cirrhotic patients. In this review, we discuss current concepts surrounding how the heart may influence the development and progression of HRS, and the role of systemic inflammation and endothelial dysfunction causing circulatory dysfunction within this setting. The temporality of heart and kidney dysfunction in HRS will be discussed. For a subgroup of patients who receive portosystemic shunting, the dynamics of cardiorenal interactions following treatment is reviewed. Continued research to determine the unknowns in this topic is anticipated, hopefully to further clarify the intricacies surrounding the liver-heart-kidney connection and improve strategies for management.
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Affiliation(s)
- Henry H L Wu
- Renal Research, Kolling Institute of Medical Research, Royal North Shore Hospital & The University of Sydney, St. Leonards (Sydney) 2065, New South Wales, Australia
| | - Amina Rakisheva
- Department of Cardiology, City Cardiological Center, Almaty 050000, Kazakhstan
| | - Arvind Ponnusamy
- Department of Renal Medicine, Royal Preston Hospital, Preston PR2 9HT, United Kingdom
| | - Rajkumar Chinnadurai
- Donal O’Donoghue Renal Research Centre & Department of Renal Medicine, Northern Care Alliance National Health Service Foundation Trust, Salford M6 8HD, United Kingdom
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Møller S, Wiese S, Barløse M, Hove JD. How non-alcoholic fatty liver disease and cirrhosis affect the heart. Hepatol Int 2023; 17:1333-1349. [PMID: 37770804 DOI: 10.1007/s12072-023-10590-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 08/29/2023] [Indexed: 09/30/2023]
Abstract
Liver diseases affect the heart and the vascular system. Cardiovascular complications appear to be a leading cause of death in patients with non-alcoholic fatty liver disease (NAFLD) and cirrhosis. The predominant histological changes in the liver range from steatosis to fibrosis to cirrhosis, which can each affect the cardiovascular system differently. Patients with cirrhotic cardiomyopathy (CCM) and NAFLD are at increased risk of impaired systolic and diastolic dysfunction and for suffering major cardiovascular events. However, the pathophysiological mechanisms behind these risks differ depending on the nature of the liver disease. Accurate assessment of symptoms by contemporary diagnostic modalities is essential for identifying patients at risk, for evaluating candidates for treatment, and prior to any invasive procedures. This review explores current perspectives within this field.
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Affiliation(s)
- Søren Møller
- Department Clinical Physiology and Nuclear Medicine 260, Center for Functional and Diagnostic Imaging and Research, Hvidovre Hospital, Copenhagen University Hospital, Kettegaards alle 30, 2650, Hvidovre, Denmark.
- Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Signe Wiese
- Gastro Unit, Medical Division, Hvidovre Hospital, Hvidovre, Denmark
| | - Mads Barløse
- Department Clinical Physiology and Nuclear Medicine 260, Center for Functional and Diagnostic Imaging and Research, Hvidovre Hospital, Copenhagen University Hospital, Kettegaards alle 30, 2650, Hvidovre, Denmark
| | - Jens D Hove
- Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Hvidovre Hospital, Hvidovre, Denmark
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Liu H, Nguyen HH, Hwang SY, Lee SS. Oxidative Mechanisms and Cardiovascular Abnormalities of Cirrhosis and Portal Hypertension. Int J Mol Sci 2023; 24:16805. [PMID: 38069125 PMCID: PMC10706054 DOI: 10.3390/ijms242316805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 11/19/2023] [Accepted: 11/24/2023] [Indexed: 12/18/2023] Open
Abstract
In patients with portal hypertension, there are many complications including cardiovascular abnormalities, hepatorenal syndrome, ascites, variceal bleeding, and hepatic encephalopathy. The underlying mechanisms are not yet completely clarified. It is well known that portal hypertension causes mesenteric congestion which produces reactive oxygen species (ROS). ROS has been associated with intestinal mucosal injury, increased intestinal permeability, enhanced gut bacterial overgrowth, and translocation; all these changes result in increased endotoxin and inflammation. Portal hypertension also results in the development of collateral circulation and reduces liver mass resulting in an overall increase in endotoxin/bacteria bypassing detoxication and immune clearance in the liver. Endotoxemia can in turn aggravate oxidative stress and inflammation, leading to a cycle of gut barrier dysfunction → endotoxemia → organ injury. The phenotype of cardiovascular abnormalities includes hyperdynamic circulation and cirrhotic cardiomyopathy. Oxidative stress is often accompanied by inflammation; thus, blocking oxidative stress can minimize the systemic inflammatory response and alleviate the severity of cardiovascular diseases. The present review aims to elucidate the role of oxidative stress in cirrhosis-associated cardiovascular abnormalities and discusses possible therapeutic effects of antioxidants on cardiovascular complications of cirrhosis including hyperdynamic circulation, cirrhotic cardiomyopathy, and hepatorenal syndrome.
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Affiliation(s)
| | | | | | - Samuel S. Lee
- Liver Unit, University of Calgary Cumming School of Medicine, Calgary, AB T2N 4N1, Canada (H.H.N.); (S.Y.H.)
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Mynster Kronborg T, Webel H, O'Connell MB, Danielsen KV, Hobolth L, Møller S, Jensen RT, Bendtsen F, Hansen T, Rasmussen S, Juel HB, Kimer N. Markers of inflammation predict survival in newly diagnosed cirrhosis: a prospective registry study. Sci Rep 2023; 13:20039. [PMID: 37973887 PMCID: PMC10654496 DOI: 10.1038/s41598-023-47384-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 11/13/2023] [Indexed: 11/19/2023] Open
Abstract
The inflammatory activity in cirrhosis is often pronounced and related to episodes of decompensation. Systemic markers of inflammation may contain prognostic information, and we investigated their possible correlation with admissions and mortality among patients with newly diagnosed liver cirrhosis. We collected plasma samples from 149 patients with newly diagnosed (within the past 6 months) cirrhosis, and registered deaths and hospital admissions within 180 days. Ninety-two inflammatory markers were quantified and correlated with clinical variables, mortality, and admissions. Prediction models were calculated by logistic regression. We compared the disease courses of our cohort with a validation cohort of 86 patients with cirrhosis. Twenty of 92 markers of inflammation correlated significantly with mortality within 180 days (q-values of 0.00-0.044), whereas we found no significant correlations with liver-related admissions. The logistic regression models yielded AUROCs of 0.73 to 0.79 for mortality and 0.61 to 0.73 for liver-related admissions, based on a variety of modalities (clinical variables, inflammatory markers, clinical scores, or combinations thereof). The models performed moderately well in the validation cohort and were better able to predict mortality than liver-related admissions. In conclusion, markers of inflammation can be used to predict 180-day mortality in patients with newly diagnosed cirrhosis. Prediction models for newly diagnosed cirrhotic patients need further validation before implementation in clinical practice.Trial registration: NCT04422223 (and NCT03443934 for the validation cohort), and Scientific Ethics Committee No.: H-19024348.
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Affiliation(s)
| | - Henry Webel
- Novo Nordisk Foundation Centre for Protein Research, Copenhagen University, Copenhagen, Denmark
| | | | | | - Lise Hobolth
- Gastro Unit, Medical Division, Hvidovre University Hospital, Hvidovre, Denmark
| | - Søren Møller
- Department of Clinical Physiology and Nuclear Medicine, Centre for Functional and Diagnostic Imaging and Research, Hvidovre Hospital, Hvidovre, Denmark
- Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Rasmus Tanderup Jensen
- Novo Nordisk Foundation Centre for Metabolic Research, Copenhagen University, Copenhagen, Denmark
| | - Flemming Bendtsen
- Gastro Unit, Medical Division, Hvidovre University Hospital, Hvidovre, Denmark
- Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Torben Hansen
- Novo Nordisk Foundation Centre for Metabolic Research, Copenhagen University, Copenhagen, Denmark
| | - Simon Rasmussen
- Novo Nordisk Foundation Centre for Protein Research, Copenhagen University, Copenhagen, Denmark
- The Novo Nordisk Foundation Centre for Genomic Mechanisms of Disease, Broad Institute of MIT and Harvard, Cambridge, USA
| | - Helene Bæk Juel
- Novo Nordisk Foundation Centre for Metabolic Research, Copenhagen University, Copenhagen, Denmark
| | - Nina Kimer
- Gastro Unit, Medical Division, Hvidovre University Hospital, Hvidovre, Denmark
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Danielsen KV, Nabilou P, Wiese SS, Hove JD, Bendtsen F, Møller S. Effect of beta-blockers on multiple haemodynamics in cirrhosis: A cross-over study by MR-imaging and hepatic vein catheterization. Liver Int 2023; 43:2245-2255. [PMID: 37387503 DOI: 10.1111/liv.15664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/25/2023] [Accepted: 06/19/2023] [Indexed: 07/01/2023]
Abstract
BACKGROUND Non-selective beta-blockers (NSBB) are widely used in the treatment of patients with cirrhosis. Only about 50% respond with a sufficient reduction in their hepatic venous pressure gradient (HVPG) and NSBB may induce detrimental cardiac and renal effects in the presence of severe decompensation. We aimed to assess the effects of NSBB on haemodynamics using magnetic resonance imaging (MRI) and to assess if these haemodynamic changes were related to the disease severity and HVPG response. METHOD A prospective cross-over study of 39 patients with cirrhosis. Patients underwent hepatic vein catheterization and MRI with assessments of HVPG, cardiac function, systemic and splanchnic haemodynamics before and after propranolol infusion. RESULTS Propranolol induced significant decreases in cardiac output (-12%) and blood flow of all vascular compartments, with the largest reductions seen in the azygos venous (-28%), portal venous (-21%), splenic (-19%) and superior mesenteric artery (-16%) blood flow. Renal artery blood flow fell by -5% in the total cohort, with a more pronounced reduction in patients without ascites than in those with ascites (-8% vs. -3%, p = .01). Twenty-four patients were NSBB responders. Their changes in HVPG after NSBB were not significantly associated with other haemodynamic changes. CONCLUSION The changes in cardiac, systemic and splanchnic haemodynamics did not differ between NSBB responders and non-responders. The effects of acute NSBB blockade on renal flow seem to depend on the severity of the hyperdynamic state, with the largest reduction in renal blood flow in compensated patients compared to decompensated patients with cirrhosis. However, future studies are needed to assess the effects of NSBB on haemodynamics and renal blood flow in patients with diuretic-resistant ascites.
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Affiliation(s)
- Karen Vagner Danielsen
- Gastro Unit, Medical Division, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
- Department of Clinical Physiology and Nuclear Medicine, Centre of Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Puria Nabilou
- Gastro Unit, Medical Division, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Signe Skovgaard Wiese
- Gastro Unit, Medical Division, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Jens Dahlgaard Hove
- Department of Clinical Physiology and Nuclear Medicine, Centre of Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
- Department of Cardiology, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
- Institute of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Flemming Bendtsen
- Gastro Unit, Medical Division, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
- Institute of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Søren Møller
- Department of Clinical Physiology and Nuclear Medicine, Centre of Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
- Institute of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
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Affiliation(s)
- Mitra K Nadim
- From the Division of Nephrology and Hypertension, Keck School of Medicine, University of Southern California, Los Angeles (M.K.N.); and the Section of Digestive Diseases, Yale University School of Medicine, New Haven, and the Section of Digestive Diseases, Veterans Affairs Connecticut Healthcare System, West Haven - both in Connecticut (G.G.-T.)
| | - Guadalupe Garcia-Tsao
- From the Division of Nephrology and Hypertension, Keck School of Medicine, University of Southern California, Los Angeles (M.K.N.); and the Section of Digestive Diseases, Yale University School of Medicine, New Haven, and the Section of Digestive Diseases, Veterans Affairs Connecticut Healthcare System, West Haven - both in Connecticut (G.G.-T.)
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Liu H, Alhassan N, Yoon KT, Almutlaq L, Lee SS. Oxidative stress triggers hyperdynamic circulation via central neural activation in portal hypertensive rats. Hepatol Int 2023; 17:689-697. [PMID: 36723800 DOI: 10.1007/s12072-023-10481-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 01/01/2023] [Indexed: 02/02/2023]
Abstract
BACKGROUND Hyperdynamic circulation in portal hypertension (PHT) depends on central neural activation. However, the initiating mechanism that signals PHT to the central neural cardiovascular-regulatory centers remains unclear. We aimed to test the hypothesis that oxidative stress in the gut initiates the signal that activates central cardiovascular nuclei in portal hypertensive rats. METHODS Two groups of rats were used. One had portal hypertension produced by partial portal vein ligation, while controls underwent sham operation. Hemodynamics including portal pressure, cardiac output, mean arterial pressure (MAP) and peripheral vascular resistance were measured. Activation of central cardiovascular nuclei was determined by immunohistochemical Fos expression in the paraventricular nucleus (PVN) of the hypothalamus. Myeloperoxidase activity, an oxidative stress marker, was measured in the jejunum. Hydrogen peroxide, the antioxidant N-acetyl-cysteine (NAC) or saline controls were administered for 12-14 days by gavage or osmotic minipumps placed in the peritoneal cavity. RESULTS Compared with controls, PHT rats showed increased cardiac output (54.2 ± 9.5 vs 33.6 ± 2.4 ml/min/100 g BW, p < 0.01), decreased MAP (96.2 ± 6.4 mmHg vs 103.2 ± 7.8, p < 0.01) and systemic vascular resistance (1.84 ± 0.28 vs 3.14 ± 0.19 mmHg/min/ml/100 g BW, p < 0.01). PHT rats had increased jejunal myeloperoxidase and PVN Fos expression. NAC treatment eliminated the hyperdynamic circulation, decreased jejunal myeloperoxidase and PVN Fos expression in PHT rats, but had no effect on sham controls. H2O2 significantly increased PVN Fos expression and decreased MAP. CONCLUSION These results indicate that in PHT, mesenteric oxidative stress is the initial signal that activates chemoreceptors and triggers hyperdynamic circulation by central neural cardiovascular-regulatory centers.
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Affiliation(s)
- Hongqun Liu
- Liver Unit, University of Calgary Cumming School of Medicine, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada
| | - Noura Alhassan
- Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Ki Tae Yoon
- Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Lamees Almutlaq
- Department of Surgery, Clinique Michel Gagner, Westmount, QC, Canada
| | - Samuel S Lee
- Liver Unit, University of Calgary Cumming School of Medicine, 3330 Hospital Dr NW, Calgary, AB, T2N 4N1, Canada.
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Reply to Cailes et al. Am J Gastroenterol 2023; 118:180-181. [PMID: 36602838 DOI: 10.14309/ajg.0000000000002089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 11/02/2022] [Indexed: 01/06/2023]
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Cardiac Dysfunction in the Pathogenesis of Hepatorenal Syndrome. Am J Gastroenterol 2023; 118:179-180. [PMID: 36191281 DOI: 10.14309/ajg.0000000000002032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022]
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Ding WZ, Wei H, Wu JP, Cheng ZG, Han ZY, Liu FY, Yu J, Liang P. Liver cirrhosis and tumor location can affect the range of intrahepatic microwave ablation zone. Int J Hyperthermia 2023; 40:2181843. [PMID: 36854449 DOI: 10.1080/02656736.2023.2181843] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023] Open
Abstract
BACKGROUND The range of an ablation zone (AZ) plays a crucial role in the treatment effect of microwave ablation (MWA). The aim of this study was to analyze the factors influencing the AZ range. METHODS Fourteen factors in four areas were included: patient-related factors (sex, age), disease-related factors (tumor location, liver cirrhosis), serological factors (ALT, AST, total protein, albumin, total bilirubin, direct bilirubin, and platelets), and MWA parameters (ablation time, power, and needle type). Multiple sequence MRI was used to delineate AZ by three radiologists using 3D Slicer. MATLAB was used to calculate the AZ length, width, and area of the largest section. Linear regression analysis was used to analyze influencing factors. Moreover, a subgroup analysis was conducted for patients with viral hepatitis. RESULT 220 patients with 290 tumors were included between 2010-2021. In addition to MWA parameters, cirrhosis and tumor location were significant factors that influenced AZ (p < 0.001). The standardized coefficient (beta) of cirrhosis (cirrhosis vs. non-cirrhosis) was positive, which meant cirrhosis would lead to a decrease in AZ range. The beta of tumor location (near the hepatic hilar zone, intermediate zone, and periphery zone) was negative, indicating that AZ range decreased as the tumor location approached the hepatic hilum. For viral hepatitis patients, Fibrosis 4 (FIB4) score was a significant factor influencing AZ (p < 0.001), and the beta was negative, indicating that AZ range decreased as FIB4 increased. CONCLUSION Liver cirrhosis, tumor location, and FIB4 affect the AZ range and should be considered when planning MWA parameters.
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Affiliation(s)
- Wen-Zhen Ding
- Fifth Medical Center of Chinese, PLA General Hospital, Beijing, China
| | - Hao Wei
- School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu, China
| | - Jia-Peng Wu
- Fifth Medical Center of Chinese, PLA General Hospital, Beijing, China
| | - Zhi-Gang Cheng
- Fifth Medical Center of Chinese, PLA General Hospital, Beijing, China
| | - Zhi-Yu Han
- Fifth Medical Center of Chinese, PLA General Hospital, Beijing, China
| | - Fang-Yi Liu
- Fifth Medical Center of Chinese, PLA General Hospital, Beijing, China
| | - Jie Yu
- Fifth Medical Center of Chinese, PLA General Hospital, Beijing, China
| | - Ping Liang
- Fifth Medical Center of Chinese, PLA General Hospital, Beijing, China
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The Cardiorenal Connection: Is Cardiac Output the Sole Determinant of Renal Dysfunction in Cirrhosis? Am J Gastroenterol 2022; 117:1242-1243. [PMID: 35926491 DOI: 10.14309/ajg.0000000000001848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 05/31/2022] [Indexed: 12/11/2022]
Abstract
Hemodynamic abnormalities are the hallmarks of advanced cirrhosis. An increased cardiac output maintains hemodynamic stability until the very late stage of cirrhosis, when the cardiac output starts to fall, which has been attributed to the development of renal dysfunction in these patients. The study by Daniesen showed that cardiac output was increased rather than decreased in patients with hepatorenal syndrome-acute kidney injury, potentially conflicting with previous understanding. It is possible that the authors were only assessing 1 aspect of cardiac dysfunction in a group of patients who were not at the very end stage of cirrhosis. Their unexpected findings will certainly stimulate further research into the role of cardiac dysfunction in the pathogenesis of acute kidney injury in cirrhosis.
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