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Canaud B, Kooman J, Davenport A, Campo D, Carreel E, Morena-Carrere M, Cristol JP. Digital health technology to support care and improve outcomes of chronic kidney disease patients: as a case illustration, the Withings toolkit health sensing tools. FRONTIERS IN NEPHROLOGY 2023; 3:1148565. [PMID: 37675376 PMCID: PMC10479582 DOI: 10.3389/fneph.2023.1148565] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 04/07/2023] [Indexed: 09/08/2023]
Abstract
Cardiovascular disease (CVD) is a major burden in dialysis-dependent chronic kidney disease (CKD5D) patients. Several factors contribute to this vulnerability including traditional risk factors such as age, gender, life style and comorbidities, and non-traditional ones as part of dialysis-induced systemic stress. In this context, it appears of utmost importance to bring a closer attention to CVD monitoring in caring for CKD5D patients to ensure early and appropriate intervention for improving their outcomes. Interestingly, new home-used, self-operated, connected medical devices offer convenient and new tools for monitoring in a fully automated and ambulatory mode CKD5D patients during the interdialytic period. Sensoring devices are installed with WiFi or Bluetooth. Some devices are also available in a cellular version such as the Withings Remote Patient Monitoring (RPM) solution. These devices analyze the data and upload the results to Withings HDS (Hybrid data security) platform servers. Data visualization can be viewed by the patient using the Withings Health Mate application on a smartphone, or with a web interface. Health Care Professionals (HCP) can also visualize patient data via the Withings web-based RPM interface. In this narrative essay, we analyze the clinical potential of pervasive wearable sensors for monitoring ambulatory dialysis patients and provide an assessment of such toolkit digital medical health devices currently available on the market. These devices offer a fully automated, unobtrusive and remote monitoring of main vital functions in ambulatory subjects. These unique features provide a multidimensional assessment of ambulatory CKD5D patients covering most physiologic functionalities, detecting unexpected disorders (i.e., volume overload, arrhythmias, sleep disorders) and allowing physicians to judge patient's response to treatment and recommendations. In the future, the wider availability of such pervasive health sensing and digital technology to monitor patients at an affordable cost price will improve the personalized management of CKD5D patients, so potentially resulting in improvements in patient quality of life and survival.
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Affiliation(s)
- Bernard Canaud
- Montpellier University, School of Medicine, Montpellier, France
- Global Medical Office, Fresenius Medical Care (FMC), Fresnes, France
| | - Jeroen Kooman
- Department of Internal Medicine, Division of Nephrology, Maastricht University Medical Center, Maastricht, Netherlands
| | - Andrew Davenport
- UCL Department of Renal Medicine, Royal Free Hospital, University College, London, United Kingdom
| | | | | | - Marion Morena-Carrere
- PhyMedExp, University of Montpellier, INSERM, CNRS, Department of Biochemistry and Hormonology, University Hospital Center of Montpellier, Montpellier, France
| | - Jean-Paul Cristol
- PhyMedExp, University of Montpellier, INSERM, CNRS, Department of Biochemistry and Hormonology, University Hospital Center of Montpellier, Montpellier, France
- AIDER-Santé, Ch. Mion Foundation, Montpellier, France
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2
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Hypertension and cardiomyopathy associated with chronic kidney disease: epidemiology, pathogenesis and treatment considerations. J Hum Hypertens 2023; 37:1-19. [PMID: 36138105 PMCID: PMC9831930 DOI: 10.1038/s41371-022-00751-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 08/09/2022] [Accepted: 08/31/2022] [Indexed: 01/31/2023]
Abstract
Chronic kidney disease (CKD) is a complex condition with a prevalence of 10-15% worldwide. An inverse-graded relationship exists between cardiovascular events and mortality with kidney function which is independent of age, sex, and other risk factors. The proportion of deaths due to heart failure and sudden cardiac death increase with progression of chronic kidney disease with relatively fewer deaths from atheromatous, vasculo-occlusive processes. This phenomenon can largely be explained by the increased prevalence of CKD-associated cardiomyopathy with worsening kidney function. The key features of CKD-associated cardiomyopathy are increased left ventricular mass and left ventricular hypertrophy, diastolic and systolic left ventricular dysfunction, and profound cardiac fibrosis on histology. While these features have predominantly been described in patients with advanced kidney disease on dialysis treatment, patients with only mild to moderate renal impairment already exhibit structural and functional changes consistent with CKD-associated cardiomyopathy. In this review we discuss the key drivers of CKD-associated cardiomyopathy and the key role of hypertension in its pathogenesis. We also evaluate existing, as well as developing therapies in the treatment of CKD-associated cardiomyopathy.
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Edwards JC, Mosman A, Hauptman PJ, Lee T, Philipneri M, Farahmand F, Yn L, Brandon M, Buchanan PM. Arrhythmia in chronic hemodialysis as a function of predialysis electrolytes and interdialytic interval. Hemodial Int 2023; 27:45-54. [PMID: 36411729 DOI: 10.1111/hdi.13057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 10/19/2022] [Accepted: 11/07/2022] [Indexed: 11/23/2022]
Abstract
INTRODUCTION People with end-stage renal disease on hemodialysis are at increased risk for death due to arrhythmia associated with the prolonged interdialytic interval that typically spans the weekend, with bradycardia being the arrhythmia most closely associated with sudden death. In this prospective observational study we assessed whether predialysis fluid and electrolytes values including hyperkalemia are risk factors for the arrhythmias associated with the prolonged interdialytic interval. METHODS Sixty patients on hemodialysis with a history of hyperkalemia underwent cardiac monitoring for 1 week. Arrhythmia frequency, average QTc interval, and average root mean square of successive differences (rMSSD) per 4-h period were reported. Predialysis electrolytes and electrocardiograms were collected prior to pre- and post-weekend dialysis sessions. Clinical variables were assessed for correlation with arrhythmias. FINDINGS Predialysis hyperkalemia occurred in 29 subjects and was more common at the post-weekend dialysis session. Bradycardia occurred in 11 subjects and increased before and during the post-weekend dialysis session, but was not correlated with any electrolyte or clinical parameter. Ventricular ectopy occurred in 50 subjects with diurnal variation unrelated to dialysis. Pre-dialysis prolonged QTc was common and not affected by interdialytic interval. Average QTc increased and rMSSD decreased during dialysis sessions and were not correlated with clinical parameters. DISCUSSION The results confirm that arrhythmias are prevalent in dialysis subjects with bradycardia particularly associated with the longer interdialytic interval; EKG markers of arrhythmia risk are increased during dialysis independent of interdialytic interval. Larger sample size and/or longer recording may be necessary to identify the clinical parameters responsible.
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Affiliation(s)
- John C Edwards
- Division of Nephrology, Department of Internal Medicine, Saint Louis University, St. Louis, Missouri, USA
| | - Amy Mosman
- Division of Nephrology, Department of Internal Medicine, Saint Louis University, St. Louis, Missouri, USA
| | - Paul J Hauptman
- Reno School of Medicine, University of Nevada, Reno, Nevada, USA
| | - Taewoo Lee
- Division of Nephrology, Department of Internal Medicine, Saint Louis University, St. Louis, Missouri, USA
| | - Marie Philipneri
- Division of Nephrology, Department of Internal Medicine, Saint Louis University, St. Louis, Missouri, USA
| | - Firoozeh Farahmand
- Division of Nephrology, Department of Internal Medicine, Saint Louis University, St. Louis, Missouri, USA
| | - Louis Yn
- Division of Nephrology, Department of Internal Medicine, Saint Louis University, St. Louis, Missouri, USA
| | - Margaret Brandon
- Division of Nephrology, Department of Internal Medicine, Saint Louis University, St. Louis, Missouri, USA
| | - Paula M Buchanan
- AHEAD Institute, Department of Health and Clinical Outcomes Research Saint Louis University, Saint Louis, Missouri, USA
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Sološenko A, Paliakaitė B, Marozas V, Sörnmo L. Training Convolutional Neural Networks on Simulated Photoplethysmography Data: Application to Bradycardia and Tachycardia Detection. Front Physiol 2022; 13:928098. [PMID: 35923223 PMCID: PMC9339964 DOI: 10.3389/fphys.2022.928098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 06/15/2022] [Indexed: 11/23/2022] Open
Abstract
Objective: To develop a method for detection of bradycardia and ventricular tachycardia using the photoplethysmogram (PPG). Approach: The detector is based on a dual-branch convolutional neural network (CNN), whose input is the scalograms of the continuous wavelet transform computed in 5-s segments. Training and validation of the CNN is accomplished using simulated PPG signals generated from RR interval series extracted from public ECG databases. Manually annotated real PPG signals from the PhysioNet/CinC 2015 Challenge Database are used for performance evaluation. The performance is compared to that of a pulse-based reference detector. Results: The sensitivity/specificity were found to be 98.1%/97.9 and 76.6%/96.8% for the CNN-based detector, respectively, whereas the corresponding results for the pulse-based detector were 94.7%/99.8 and 67.1%/93.8%, respectively. Significance: The proposed detector may be useful for continuous, long-term monitoring of bradycardia and tachycardia using wearable devices, e.g., wrist-worn devices, especially in situations where sensitivity is favored over specificity. The study demonstrates that simulated PPG signals are suitable for training and validation of a CNN.
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Affiliation(s)
- Andrius Sološenko
- Biomedical Engineering Institute, Kaunas University of Technology, Kaunas, Lithuania
- *Correspondence: Andrius Sološenko ,
| | - Birutė Paliakaitė
- Biomedical Engineering Institute, Kaunas University of Technology, Kaunas, Lithuania
| | - Vaidotas Marozas
- Biomedical Engineering Institute, Kaunas University of Technology, Kaunas, Lithuania
- Department of Electronics Engineering, Kaunas University of Technology, Kaunas, Lithuania
| | - Leif Sörnmo
- Department of Biomedical Engineering, Lund University, Lund, Sweden
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Ravi KS, Espersen C, Curtis KA, Cunningham JW, Jering KS, Prasad NG, Platz E, Mc Causland FR. Temporal Changes in Electrolytes, Acid-Base, QTc Duration, and Point-of-Care Ultrasound during Inpatient Hemodialysis Sessions. KIDNEY360 2022; 3:1217-1227. [PMID: 35919528 PMCID: PMC9337888 DOI: 10.34067/kid.0001652022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 05/09/2022] [Indexed: 02/02/2023]
Abstract
Background Of the more than 550,000 patients receiving maintenance hemodialysis (HD) in the United States, each has an average of 1.6 admissions annually (>880,000 inpatient HD sessions). Little is known about the temporal changes in laboratory values, ECGs, and intravascular and extravascular volume during inpatient HD sessions. Methods In this prospective cohort study of hospitalized HD patients, we assessed intradialytic laboratory values (metabolic panels, blood gases, ionized calcium levels), ECGs, and sonographic measures of volume status. Results Among 30 participants undergoing HD (mean age 62 years; 53% men, 43% Black) laboratory values had the largest changes in the first hour of HD. There was no significant change in ionized calcium levels pre- to post-HD (change: -0.01±0.07, P=0.24); 12 of 30 and 17 of 30 patients had levels below the lower reference limit at the beginning and end of HD, respectively. The mean pH increased pre- to post-HD (change: 0.06±0.04, P<0.001); 21 of 30 had a pH above the upper reference limit post-HD. There was a trend toward longer median QTc duration from pre- to post-HD (change: 7.5 msec [-5 msec, 19 msec], P=0.07). The sum of B lines on lung ultrasound decreased from pre- to post-HD (median decrease: 3 [1, 7], P<0.01). The collapsibility index of the inferior vena cava increased pre- to post-HD (median increase: 4.8% [1.5%, 13.4%], P=0.01), whereas internal jugular vein diameter did not change (P=0.24). Conclusions Among hospitalized patients undergoing HD, we found dynamic changes in laboratory values, QTc duration, and volume status. Further research is required to assess whether HD prescriptions can be tailored to alter these variations to potentially improve patient outcomes.
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Affiliation(s)
- Katherine Scovner Ravi
- Renal Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts,Harvard Medical School, Boston, Massachusetts
| | - Caroline Espersen
- Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts,Cardiovascular Noninvasive Imaging Research Laboratory, Department of Cardiology, Herlev and Gentofte Hospital, Copenhagen, Denmark
| | - Katherine A. Curtis
- Renal Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts,Harvard Medical School, Boston, Massachusetts
| | - Jonathan W. Cunningham
- Harvard Medical School, Boston, Massachusetts,Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
| | - Karola S. Jering
- Harvard Medical School, Boston, Massachusetts,Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
| | - Narayana G. Prasad
- Harvard Medical School, Boston, Massachusetts,Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
| | - Elke Platz
- Harvard Medical School, Boston, Massachusetts,Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
| | - Finnian R. Mc Causland
- Renal Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts,Harvard Medical School, Boston, Massachusetts
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6
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Zhao H, Su C. Correlation of Nursing Quality and Complications in the Hemodialysis Room as well as Nursing Countermeasures. JOURNAL OF HEALTHCARE ENGINEERING 2022; 2022:1841454. [PMID: 38633138 PMCID: PMC11022511 DOI: 10.1155/2022/1841454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/21/2022] [Accepted: 03/24/2022] [Indexed: 04/19/2024]
Abstract
Objective This study was designed to analyze the correlation between the nursing quality and complications in the hemodialysis room and to explore the nursing countermeasures to reduce the occurrence of complications. Methods A total of 242 patients with renal failure were enrolled in our hospital from May 2020 to May 2021. The complications of the patients within 3 months of hemodialysis treatment were observed and recorded. The nursing quality of the corresponding nurses was evaluated by patients. The correlation between nursing quality and complications in the hemodialysis room was analyzed, and the targeted nursing countermeasures were explored. Results Within 3 months of hemodialysis treatment, 69 of the 242 patients with renal failure in this study developed complications, with a complication rate of 28.51% (69/242). There were 33 cases (13.64%) of hypertension, 25 cases (10.33%) of hypotension, 15 cases (6.20%) of imbalance syndrome, and 12 cases (4.96%) of arrhythmia, of which 16 cases (6.61%) had two complications. The service quality of patients with hypertension, hypotension, and arrhythmia was significantly lower than that of patients without these complications (P < 0.05). The proportion of low-quality nursing patients with hypertension, hypotension, and arrhythmia was higher than that of patients without these complications (P < 0.05). Logistic regression analysis showed that hypertension, hypotension, and arrhythmia in complications in the hemodialysis room were related to the nursing quality (OR > 0, P < 0.05). Conclusion The risk of complications in the hemodialysis room is high. Among which hypertension, hypotension, and arrhythmia are common and are related to the nursing quality. Nursing countermeasures should be taken to reduce complications in the hemodialysis room.
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Affiliation(s)
- Hongyan Zhao
- Department of Blood Purification Center, The First People's Hospital of Lianyungang, No. 6 Zhenhua East Road, Lianyungang, Jiangsu 222000, China
| | - Changmin Su
- Department of Blood Purification Center, The First People's Hospital of Lianyungang, No. 6 Zhenhua East Road, Lianyungang, Jiangsu 222000, China
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7
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Canaud B, Kooman JP, Selby NM, Taal M, Maierhofer A, Kopperschmidt P, Francis S, Collins A, Kotanko P. Hidden risks associated with conventional short intermittent hemodialysis: A call for action to mitigate cardiovascular risk and morbidity. World J Nephrol 2022; 11:39-57. [PMID: 35433339 PMCID: PMC8968472 DOI: 10.5527/wjn.v11.i2.39] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 10/30/2021] [Accepted: 03/23/2022] [Indexed: 02/06/2023] Open
Abstract
The development of maintenance hemodialysis (HD) for end stage kidney disease patients is a success story that continues to save many lives. Nevertheless, intermittent renal replacement therapy is also a source of recurrent stress for patients. Conventional thrice weekly short HD is an imperfect treatment that only partially corrects uremic abnormalities, increases cardiovascular risk, and exacerbates disease burden. Altering cycles of fluid loading associated with cardiac stretching (interdialytic phase) and then fluid unloading (intradialytic phase) likely contribute to cardiac and vascular damage. This unphysiologic treatment profile combined with cyclic disturbances including osmotic and electrolytic shifts may contribute to morbidity in dialysis patients and augment the health burden of treatment. As such, HD patients are exposed to multiple stressors including cardiocirculatory, inflammatory, biologic, hypoxemic, and nutritional. This cascade of events can be termed the dialysis stress storm and sickness syndrome. Mitigating cardiovascular risk and morbidity associated with conventional intermittent HD appears to be a priority for improving patient experience and reducing disease burden. In this in-depth review, we summarize the hidden effects of intermittent HD therapy, and call for action to improve delivered HD and develop treatment schedules that are better tolerated and associated with fewer adverse effects.
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Affiliation(s)
- Bernard Canaud
- Global Medical Office, Fresenius Medical Care, Bad Homburg 61352, Germany
- Department of Nephrology, Montpellier University, Montpellier 34000, France
| | - Jeroen P Kooman
- Department of Internal Medicine, Maastricht University, Maastricht 6229 HX, Netherlands
| | - Nicholas M Selby
- Centre for Kidney Research and Innovation, Academic Unit for Translational Medical Sciences, School of Medicine, University of Nottingham, Derby DE22 3DT, United Kingdom
| | - Maarten Taal
- Centre for Kidney Research and Innovation, Academic Unit for Translational Medical Sciences, School of Medicine, University of Nottingham, Derby DE22 3DT, United Kingdom
| | - Andreas Maierhofer
- Global Research Development, Fresenius Medical Care, Schweinfurt 97424, Germany
| | | | - Susan Francis
- Sir Peter Mansfield Imaging Centre, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Allan Collins
- Global Medical Office, Fresenius Medical Care, Bad Homburg 61352, Germany
| | - Peter Kotanko
- Renal Research Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10065, United States
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8
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Zhou R, Xu J, Luan J, Wang W, Tang X, Huang Y, Su Z, Yang L, Gu Z. Predictive role of C-reactive protein in sudden death: a meta-analysis of prospective studies. J Int Med Res 2022; 50:3000605221079547. [PMID: 35225715 PMCID: PMC8894975 DOI: 10.1177/03000605221079547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objective C-reactive protein (CRP) is a powerful predictor of and risk factor for cardiovascular disease. However, the relationship between CRP and sudden death (SD) is controversial. Therefore, we performed a meta-analysis to evaluate the association between CRP and SD. Methods We conducted a comprehensive search of the databases of PubMed, Web of Science, Embase, Cochrane Library, Wanfang, CNKI, China Biology Medicine disc, and Weipu. Two researchers independently screened the literature, extracted data, and evaluated the data quality. The overall effect size was meta-analyzed using Stata software version 12.0 (StataCorp, College Station, TX, USA). Results Twelve prospective studies involving 36,646 patients were included in the present meta-analysis. The data revealed that patients with higher CRP concentrations had a greater risk of SD (hazard ratio, 1.19; 95% confidence interval, 1.09–1.29). When the hazard ratio of SD was calculated by multivariate analysis of nine studies, CRP was confirmed to be an independent predictive factor for SD (hazard ratio, 1.05; 95% confidence interval, 1.03–1.07). Conclusions This meta-analysis confirmed that CRP is an independent predictor of SD. These results support the recommendation of recording the CRP concentration for risk assessment of SD in clinical practice.
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Affiliation(s)
- Ruhua Zhou
- The College of Nursing, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jingjing Xu
- The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jiaochen Luan
- The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Weiyun Wang
- The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xinzhi Tang
- The College of Nursing, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yanling Huang
- The College of Nursing, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Ziwen Su
- The College of Nursing, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lei Yang
- The College of Nursing, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Zejuan Gu
- The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
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Canaud B, Stephens MP, Nikam M, Etter M, Collins A. Multitargeted interventions to reduce dialysis-induced systemic stress. Clin Kidney J 2021; 14:i72-i84. [PMID: 34987787 PMCID: PMC8711765 DOI: 10.1093/ckj/sfab192] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Indexed: 11/13/2022] Open
Abstract
Hemodialysis (HD) is a life-sustaining therapy as well as an intermittent and repetitive stress condition for the patient. In ridding the blood of unwanted substances and excess fluid from the blood, the extracorporeal procedure simultaneously induces persistent physiological changes that adversely affect several organs. Dialysis patients experience this systemic stress condition usually thrice weekly and sometimes more frequently depending on the treatment schedule. Dialysis-induced systemic stress results from multifactorial components that include treatment schedule (i.e. modality, treatment time), hemodynamic management (i.e. ultrafiltration, weight loss), intensity of solute fluxes, osmotic and electrolytic shifts and interaction of blood with components of the extracorporeal circuit. Intradialytic morbidity (i.e. hypovolemia, intradialytic hypotension, hypoxia) is the clinical expression of this systemic stress that may act as a disease modifier, resulting in multiorgan injury and long-term morbidity. Thus, while lifesaving, HD exposes the patient to several systemic stressors, both hemodynamic and non-hemodynamic in origin. In addition, a combination of cardiocirculatory stress, greatly conditioned by the switch from hypervolemia to hypovolemia, hypoxemia and electrolyte changes may create pro-arrhythmogenic conditions. Moreover, contact of blood with components of the extracorporeal circuit directly activate circulating cells (i.e. macrophages-monocytes or platelets) and protein systems (i.e. coagulation, complement, contact phase kallikrein-kinin system), leading to induction of pro-inflammatory cytokines and resulting in chronic low-grade inflammation, further contributing to poor outcomes. The multifactorial, repetitive HD-induced stress that globally reduces tissue perfusion and oxygenation could have deleterious long-term consequences on the functionality of vital organs such as heart, brain, liver and kidney. In this article, we summarize the multisystemic pathophysiological consequences of the main circulatory stress factors. Strategies to mitigate their effects to provide more cardioprotective and personalized dialytic therapies are proposed to reduce the systemic burden of HD.
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Affiliation(s)
- Bernard Canaud
- Montpellier University, Montpellier, France
- Global Medical Office, FMC Deutschland, Bad Homburg, Germany
| | - Melanie P Stephens
- MSL & Medical Strategies for Innovative Therapies, Fresenius Medical Care, Waltham, MA, USA
| | - Milind Nikam
- Global Medical Office, Fresenius Medical Care, Hong Kong
| | - Michael Etter
- Global Medical Office, Fresenius Medical Care, Hong Kong
| | - Allan Collins
- Global Medical Office, Fresenius Medical Care, Waltham, MA, USA
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10
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Pfau A, Ermer T, Coca SG, Tio MC, Genser B, Reichel M, Finkelstein FO, März W, Wanner C, Waikar SS, Eckardt KU, Aronson PS, Drechsler C, Knauf F. High Oxalate Concentrations Correlate with Increased Risk for Sudden Cardiac Death in Dialysis Patients. J Am Soc Nephrol 2021; 32:2375-2385. [PMID: 34281958 PMCID: PMC8729829 DOI: 10.1681/asn.2020121793] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 05/10/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND The clinical significance of accumulating toxic terminal metabolites such as oxalate in patients with kidney failure is not well understood. METHODS To evaluate serum oxalate concentrations and risk of all-cause mortality and cardiovascular events in a cohort of patients with kidney failure requiring chronic dialysis, we performed a post-hoc analysis of the randomized German Diabetes Dialysis (4D) Study; this study included 1255 European patients on hemodialysis with diabetes followed-up for a median of 4 years. The results obtained via Cox proportional hazards models were confirmed by competing risk regression and restricted cubic spline modeling in the 4D Study cohort and validated in a separate cohort of 104 US patients on dialysis after a median follow-up of 2.5 years. RESULTS A total of 1108 patients had baseline oxalate measurements, with a median oxalate concentration of 42.4 µM. During follow-up, 548 patients died, including 139 (25.4%) from sudden cardiac death. A total of 413 patients reached the primary composite cardiovascular end point (cardiac death, nonfatal myocardial infarction, and fatal or nonfatal stroke). Patients in the highest oxalate quartile (≥59.7 µM) had a 40% increased risk for cardiovascular events (adjusted hazard ratio [aHR], 1.40; 95% confidence interval [95% CI], 1.08 to 1.81) and a 62% increased risk of sudden cardiac death (aHR, 1.62; 95% CI, 1.03 to 2.56), compared with those in the lowest quartile (≤29.6 µM). The associations remained when accounting for competing risks and with oxalate as a continuous variable. CONCLUSIONS Elevated serum oxalate is a novel risk factor for cardiovascular events and sudden cardiac death in patients on dialysis. Further studies are warranted to test whether oxalate-lowering strategies improve cardiovascular mortality in patients on dialysis.
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Affiliation(s)
- Anja Pfau
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Theresa Ermer
- Department of Nephrology and Hypertension, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany,Department of Internal Medicine, Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut,London School of Hygiene & Tropical Medicine, University of London, London, United Kingdom
| | - Steven G. Coca
- Division of Nephrology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Maria Clarissa Tio
- Division of Renal Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
| | - Bernd Genser
- BGStats Consulting, Vienna, Austria,Mannheim Institute of Public Health, Social and Preventive Medicine, University of Heidelberg, Heidelberg, Germany
| | - Martin Reichel
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Fredric O. Finkelstein
- Department of Internal Medicine, Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut
| | - Winfried März
- Medical Clinic V (Nephrology, Hypertensiology, Rheumatology, Endocrinology, Diabetology), University of Heidelberg, Mannheim, Germany,Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria,Synlab Academy, Mannheim, Germany
| | - Christoph Wanner
- Division of Nephrology, Department of Internal Medicine 1 and Comprehensive Heart Failure Centre, University Hospital of Würzburg, Würzburg, Germany
| | - Sushrut S. Waikar
- Section of Nephrology, Department of Medicine, Boston University School of Medicine and Boston Medical Center, Boston, Massachusetts
| | - Kai-Uwe Eckardt
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Peter S. Aronson
- Department of Internal Medicine, Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut
| | - Christiane Drechsler
- Division of Nephrology, Department of Internal Medicine 1 and Comprehensive Heart Failure Centre, University Hospital of Würzburg, Würzburg, Germany,KfH Kidney Center for Dialysis and Kidney Transplantation, Würzburg, Germany
| | - Felix Knauf
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany,Department of Internal Medicine, Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut
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11
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Pickup LC, Law JP, Townend JN, Ferro CJ. Sudden cardiac death in chronic renal disease: aetiology and risk reduction strategies. Nephrol Dial Transplant 2021; 36:1386-1388. [PMID: 31747026 PMCID: PMC8311576 DOI: 10.1093/ndt/gfz232] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 10/02/2019] [Indexed: 11/30/2022] Open
Affiliation(s)
- Luke C Pickup
- Birmingham Cardio-Renal Group, University Hospitals Birmingham and University of Birmingham, Queen Elizabeth Hospital, Edgbaston, Birmingham, UK
| | - Jonathan P Law
- Birmingham Cardio-Renal Group, University Hospitals Birmingham and University of Birmingham, Queen Elizabeth Hospital, Edgbaston, Birmingham, UK
| | - Jonathan N Townend
- Birmingham Cardio-Renal Group, University Hospitals Birmingham and University of Birmingham, Queen Elizabeth Hospital, Edgbaston, Birmingham, UK
| | - Charles J Ferro
- Birmingham Cardio-Renal Group, University Hospitals Birmingham and University of Birmingham, Queen Elizabeth Hospital, Edgbaston, Birmingham, UK
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12
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Paliakaitė B, Petrėnas A, Sološenko A, Marozas V. Modeling of artifacts in the wrist photoplethysmogram: Application to the detection of life-threatening arrhythmias. Biomed Signal Process Control 2021. [DOI: 10.1016/j.bspc.2021.102421] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Lai AC, Bienstock SW, Sharma R, Skorecki K, Beerkens F, Samtani R, Coyle A, Kim T, Baber U, Camaj A, Power D, Fuster V, Goldman ME. A Personalized Approach to Chronic Kidney Disease and Cardiovascular Disease: JACC Review Topic of the Week. J Am Coll Cardiol 2021; 77:1470-1479. [PMID: 33736830 DOI: 10.1016/j.jacc.2021.01.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/30/2020] [Accepted: 01/04/2021] [Indexed: 01/11/2023]
Abstract
Cardiovascular disease is the most common cause of death in patients with end-stage renal disease (ESRD). The initiation of dialysis for treatment of ESRD exacerbates chronic electrolyte and hemodynamic perturbations. Rapid large shifts in effective intravascular volume and electrolyte concentrations ultimately lead to subendocardial ischemia, increased left ventricular wall mass, and diastolic dysfunction, and can precipitate serious arrhythmias through a complex pathophysiological process. These factors, unique to advanced kidney disease and its treatment, increase the overall incidence of acute coronary syndrome and sudden cardiac death. To date, risk prediction models largely fail to incorporate the observed cardiovascular mortality in the CKD population; however, multimodality imaging may provide an additional prognostication and risk stratification. This comprehensive review discusses the cardiovascular risks associated with hemodialysis, and explores the pathophysiology and the novel utilization of multimodality imaging in CKD to promote a personalized approach for these patients with implications for future research.
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Affiliation(s)
- Ashton C Lai
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | | | - Raman Sharma
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - Karl Skorecki
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel
| | - Frans Beerkens
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - Rajeev Samtani
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - Andrew Coyle
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - Tonia Kim
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - Usman Baber
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - Anton Camaj
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - David Power
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA
| | - Valentin Fuster
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Martin E Goldman
- Icahn School of Medicine at Mount Sinai Hospital, New York, New York, USA.
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14
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Pilia N, Severi S, Raimann JG, Genovesi S, Dössel O, Kotanko P, Corsi C, Loewe A. Quantification and classification of potassium and calcium disorders with the electrocardiogram: What do clinical studies, modeling, and reconstruction tell us? APL Bioeng 2020; 4:041501. [PMID: 33062908 PMCID: PMC7532940 DOI: 10.1063/5.0018504] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/13/2020] [Indexed: 11/14/2022] Open
Abstract
Diseases caused by alterations of ionic concentrations are frequently observed challenges and play an important role in clinical practice. The clinically established method for the diagnosis of electrolyte concentration imbalance is blood tests. A rapid and non-invasive point-of-care method is yet needed. The electrocardiogram (ECG) could meet this need and becomes an established diagnostic tool allowing home monitoring of the electrolyte concentration also by wearable devices. In this review, we present the current state of potassium and calcium concentration monitoring using the ECG and summarize results from previous work. Selected clinical studies are presented, supporting or questioning the use of the ECG for the monitoring of electrolyte concentration imbalances. Differences in the findings from automatic monitoring studies are discussed, and current studies utilizing machine learning are presented demonstrating the potential of the deep learning approach. Furthermore, we demonstrate the potential of computational modeling approaches to gain insight into the mechanisms of relevant clinical findings and as a tool to obtain synthetic data for methodical improvements in monitoring approaches.
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Affiliation(s)
- N Pilia
- Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
| | - S Severi
- Department of Electrical, Electronic, and Information Engineering "Guglielmo Marconi," University of Bologna, 47522 Cesena, Italy
| | - J G Raimann
- Renal Research Institute, New York, New York 10065, USA
| | - S Genovesi
- Department of Medicine and Surgery, University of Milan-Bicocca, 20100 Milan, Italy
| | - O Dössel
- Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
| | | | - C Corsi
- Department of Electrical, Electronic, and Information Engineering "Guglielmo Marconi," University of Bologna, 47522 Cesena, Italy
| | - A Loewe
- Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
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15
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Canaud B, Kooman JP, Selby NM, Taal MW, Francis S, Maierhofer A, Kopperschmidt P, Collins A, Kotanko P. Dialysis-Induced Cardiovascular and Multiorgan Morbidity. Kidney Int Rep 2020; 5:1856-1869. [PMID: 33163709 PMCID: PMC7609914 DOI: 10.1016/j.ekir.2020.08.031] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 08/27/2020] [Indexed: 12/14/2022] Open
Abstract
Hemodialysis has saved many lives, albeit with significant residual mortality. Although poor outcomes may reflect advanced age and comorbid conditions, hemodialysis per se may harm patients, contributing to morbidity and perhaps mortality. Systemic circulatory "stress" resulting from hemodialysis treatment schedule may act as a disease modifier, resulting in a multiorgan injury superimposed on preexistent comorbidities. New functional intradialytic imaging (i.e., echocardiography, cardiac magnetic resonance imaging [MRI]) and kinetic of specific cardiac biomarkers (i.e., Troponin I) have clearly documented this additional source of end-organ damage. In this context, several factors resulting from patient-hemodialysis interaction and/or patient management have been identified. Intradialytic hypovolemia, hypotensive episodes, hypoxemia, solutes, and electrolyte fluxes as well as cardiac arrhythmias are among the contributing factors to systemic circulatory stress that are induced by hemodialysis. Additionally, these factors contribute to patients' symptom burden, impair cognitive function, and finally have a negative impact on patients' perception and quality of life. In this review, we summarize the adverse systemic effects of current intermittent hemodialysis therapy, their pathophysiologic consequences, review the evidence for interventions that are cardioprotective, and explore new approaches that may further reduce the systemic burden of hemodialysis. These include improved biocompatible materials, smart dialysis machines that automatically may control the fluxes of solutes and electrolytes, volume and hemodynamic control, health trackers, and potentially disruptive technologies facilitating a more personalized medicine approach.
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Affiliation(s)
- Bernard Canaud
- Montpellier University, Montpellier, France
- GMO, FMC, Bad Homburg, Germany
| | - Jeroen P. Kooman
- Maastricht University Medical Centre, Department of Internal Medicine, Maastricht, Netherlands
| | - Nicholas M. Selby
- Centre for Kidney Research and Innovation, Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, UK
| | - Maarten W. Taal
- Centre for Kidney Research and Innovation, Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, UK
| | - Susan Francis
- Sir Peter Mansfield Imaging Centre, University of Nottingham, UK
| | | | | | | | - Peter Kotanko
- Renal Research Institute, New York, NY, USA
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
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16
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Law JP, Price AM, Pickup L, Radhakrishnan A, Weston C, Jones AM, McGettrick HM, Chua W, Steeds RP, Fabritz L, Kirchhof P, Pavlovic D, Townend JN, Ferro CJ. Clinical Potential of Targeting Fibroblast Growth Factor-23 and αKlotho in the Treatment of Uremic Cardiomyopathy. J Am Heart Assoc 2020; 9:e016041. [PMID: 32212912 PMCID: PMC7428638 DOI: 10.1161/jaha.120.016041] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chronic kidney disease is highly prevalent, affecting 10% to 15% of the adult population worldwide and is associated with increased cardiovascular morbidity and mortality. As chronic kidney disease worsens, a unique cardiovascular phenotype develops characterized by heart muscle disease, increased arterial stiffness, atherosclerosis, and hypertension. Cardiovascular risk is multifaceted, but most cardiovascular deaths in patients with advanced chronic kidney disease are caused by heart failure and sudden cardiac death. While the exact drivers of these deaths are unknown, they are believed to be caused by uremic cardiomyopathy: a specific pattern of myocardial hypertrophy, fibrosis, with both diastolic and systolic dysfunction. Although the pathogenesis of uremic cardiomyopathy is likely to be multifactorial, accumulating evidence suggests increased production of fibroblast growth factor-23 and αKlotho deficiency as potential major drivers of cardiac remodeling in patients with uremic cardiomyopathy. In this article we review the increasing understanding of the physiology and clinical aspects of uremic cardiomyopathy and the rapidly increasing knowledge of the biology of both fibroblast growth factor-23 and αKlotho. Finally, we discuss how dissection of these pathological processes is aiding the development of therapeutic options, including small molecules and antibodies, directly aimed at improving the cardiovascular outcomes of patients with chronic kidney disease and end-stage renal disease.
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Affiliation(s)
- Jonathan P. Law
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of NephrologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Anna M. Price
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of NephrologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Luke Pickup
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
| | - Ashwin Radhakrishnan
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
| | - Chris Weston
- Institute of Immunology and ImmunotherapyUniversity of BirminghamUnited Kingdom
- NIHR Birmingham Biomedical Research CentreUniversity Hospitals Birmingham NHS Foundation Trust and University of BirminghamUnited Kingdom
| | - Alan M. Jones
- School of PharmacyUniversity of BirminghamUnited Kingdom
| | | | - Winnie Chua
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
| | - Richard P. Steeds
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of CardiologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Larissa Fabritz
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of CardiologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Paulus Kirchhof
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
| | - Davor Pavlovic
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
| | - Jonathan N. Townend
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of CardiologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Charles J. Ferro
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of NephrologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
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17
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Skampardoni S, Poulikakos D, Malik M, Green D, Kalra PA. The potential of electrocardiography for cardiac risk prediction in chronic and end-stage kidney disease. Nephrol Dial Transplant 2020; 34:1089-1098. [PMID: 30085289 DOI: 10.1093/ndt/gfy255] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Indexed: 11/14/2022] Open
Abstract
Cardiovascular mortality is very high in chronic and end-stage kidney disease (ESKD). However, risk stratification data are lacking. Sudden cardiac deaths are among the most common cardiovascular causes of death in these populations. As a result, many studies have assessed the prognostic potential of various electrocardiographic parameters in the renal population. Recent data from studies of implantable loop recordings in haemodialysis patients from five different countries have shed light on a pre-eminent bradyarrhythmic risk of mortality. Importantly, heart block addressed by permanent pacing system was detected in a proportion of patients during the prolonged recording periods. Standard electrocardiogram is inexpensive, non-invasive and easily accessible. Hence, risk prediction models using this simple investigation tool could easily translate into clinical practice. We believe that electrocardiographic assessment is currently under-valued in renal populations. For this review, we identified studies from the preceding 10 years that assessed the use of conventional and novel electrocardiographic biomarkers as risk predictors in chronic and ESKD. The review indicates that conventional electrocardiographic markers are not reliable for risk stratification in the renal populations. Novel parameters have shown promising results in smaller studies, but further validation in larger populations is required.
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Affiliation(s)
- Sofia Skampardoni
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Renal Department, Salford Royal NHS Trust, Salford, UK
| | - Dimitrios Poulikakos
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Renal Department, Salford Royal NHS Trust, Salford, UK
| | - Marek Malik
- National Heart and Lung Institute, Imperial College, London, UK
| | - Darren Green
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Renal Department, Salford Royal NHS Trust, Salford, UK
| | - Philip A Kalra
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Renal Department, Salford Royal NHS Trust, Salford, UK
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18
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Loewe A, Lutz Y, Nairn D, Fabbri A, Nagy N, Toth N, Ye X, Fuertinger DH, Genovesi S, Kotanko P, Raimann JG, Severi S. Hypocalcemia-Induced Slowing of Human Sinus Node Pacemaking. Biophys J 2019; 117:2244-2254. [PMID: 31570229 PMCID: PMC6990151 DOI: 10.1016/j.bpj.2019.07.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 06/27/2019] [Accepted: 07/24/2019] [Indexed: 12/13/2022] Open
Abstract
Each heartbeat is initiated by cyclic spontaneous depolarization of cardiomyocytes in the sinus node forming the primary natural pacemaker. In patients with end-stage renal disease undergoing hemodialysis, it was recently shown that the heart rate drops to very low values before they suffer from sudden cardiac death with an unexplained high incidence. We hypothesize that the electrolyte changes commonly occurring in these patients affect sinus node beating rate and could be responsible for severe bradycardia. To test this hypothesis, we extended the Fabbri et al. computational model of human sinus node cells to account for the dynamic intracellular balance of ion concentrations. Using this model, we systematically tested the effect of altered extracellular potassium, calcium, and sodium concentrations. Although sodium changes had negligible (0.15 bpm/mM) and potassium changes mild effects (8 bpm/mM), calcium changes markedly affected the beating rate (46 bpm/mM ionized calcium without autonomic control). This pronounced bradycardic effect of hypocalcemia was mediated primarily by ICaL attenuation due to reduced driving force, particularly during late depolarization. This, in turn, caused secondary reduction of calcium concentration in the intracellular compartments and subsequent attenuation of inward INaCa and reduction of intracellular sodium. Our in silico findings are complemented and substantiated by an empirical database study comprising 22,501 pairs of blood samples and in vivo heart rate measurements in hemodialysis patients and healthy individuals. A reduction of extracellular calcium was correlated with a decrease of heartrate by 9.9 bpm/mM total serum calcium (p < 0.001) with intact autonomic control in the cross-sectional population. In conclusion, we present mechanistic in silico and empirical in vivo data supporting the so far neglected but experimentally testable and potentially important mechanism of hypocalcemia-induced bradycardia and asystole, potentially responsible for the highly increased and so far unexplained risk of sudden cardiac death in the hemodialysis patient population.
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Affiliation(s)
- Axel Loewe
- Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany.
| | - Yannick Lutz
- Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Deborah Nairn
- Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Alan Fabbri
- Department of Electrical, Electronic and Information Engineering "Guglielmo Marconi," University of Bologna, Cesena, Italy; Department of Medical Physiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Norbert Nagy
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Szeged, Hungary
| | - Noemi Toth
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Szeged, Hungary
| | - Xiaoling Ye
- Renal Research Institute, New York City, New York
| | | | - Simonetta Genovesi
- Department of Medicine and Surgery, Università degli Studi di Milano-Bicocca, Monza, Italy
| | - Peter Kotanko
- Renal Research Institute, New York City, New York; Icahn School of Medicine at Mount Sinai, New York City, New York
| | | | - Stefano Severi
- Department of Electrical, Electronic and Information Engineering "Guglielmo Marconi," University of Bologna, Cesena, Italy
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19
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Samanta R, Chan C, Chauhan VS. Arrhythmias and Sudden Cardiac Death in End Stage Renal Disease: Epidemiology, Risk Factors, and Management. Can J Cardiol 2019; 35:1228-1240. [DOI: 10.1016/j.cjca.2019.05.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 04/23/2019] [Accepted: 05/07/2019] [Indexed: 11/17/2022] Open
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20
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Loewe A, Lutz Y, Nagy N, Fabbri A, Schweda C, Varro A, Severi S. Inter-Species Differences in the Response of Sinus Node Cellular Pacemaking to Changes of Extracellular Calcium. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2019; 2019:1875-1878. [PMID: 31946263 DOI: 10.1109/embc.2019.8857573] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Changes of serum and extracellular ion concentrations occur regularly in patients with chronic kidney disease (CKD). Recently, hypocalcaemia, i.e. a decrease of the extracellular calcium concentration [Ca2+]o, has been suggested as potential pathomechanism contributing to the unexplained high rate of sudden cardiac death (SCD) in CKD patients. In particular, there is a hypothesis that hypocalcaemia could slow down natural pacemaking in the human sinus node to fatal degrees. Here, we address the question whether there are inter-species differences in the response of cellular sinus node pacemaking to changes of [Ca2+]o. Towards this end, we employ computational models of mouse, rabbit and human sinus node cells. The Fabbri et al. human model was updated to consider changes of intracellular ion concentrations. We identified crucial inter-species differences in the response of cellular pacemaking in the sinus node to changes of [Ca2+]o with little changes of cycle length in mouse and rabbit models (<; 83 ms) in contrast to a pronounced bradycardic effect in the human model (up to >1000 ms). Our results suggest that experiments with human sinus node cells are required to investigate the potential mechanism of hypocalcaemia-induced bradycardic SCD in CKD patients and small animal models are not well suited.
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21
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Poulikakos D, Hnatkova K, Skampardoni S, Green D, Kalra P, Malik M. Sudden Cardiac Death in Dialysis: Arrhythmic Mechanisms and the Value of Non-invasive Electrophysiology. Front Physiol 2019; 10:144. [PMID: 30873044 PMCID: PMC6401645 DOI: 10.3389/fphys.2019.00144] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Accepted: 02/07/2019] [Indexed: 01/10/2023] Open
Abstract
Sudden Cardiac Death (SCD) is the leading cause of cardiovascular death in dialysis patients. This review discusses potential underlying arrhythmic mechanisms of SCD in the dialysis population. It examines recent evidence from studies using implantable loop recorders and from electrophysiological studies in experimental animal models of chronic kidney disease. The review summarizes advances in the field of non-invasive electrophysiology for risk prediction in dialysis patients focusing on the predictive value of the QRS-T angle and of the assessments of autonomic imbalance by means of heart rate variability analysis. Future research directions in non-invasive electrophysiology are identified to advance the understanding of the arrhythmic mechanisms. A suggestion is made of incorporation of non-invasive electrophysiology procedures into clinical practice. Key Concepts: - Large prospective studies in dialysis patients with continuous ECG monitoring are required to clarify the underlying arrhythmic mechanisms of SCD in dialysis patients. - Obstructive sleep apnoea may be associated with brady-arrhythmias in dialysis patients. Studies are needed to elucidate the burden and impact of sleeping disorders on arrhythmic complications in dialysis patients. - The QRS-T angle has the potential to be used as a descriptor of uremic cardiomyopathy. - The QRS-T angle can be calculated from routine collected surface ECGs. Multicenter collaboration is required to establish best methodological approach and normal values. - Heart Rate Variability provides indirect assessment of cardiac modulation that may be relevant for cardiac risk prediction in dialysis patients. Short-term recordings with autonomic provocations are likely to overcome the limitations of out of hospital 24-h recordings and should be prospectively assessed.
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Affiliation(s)
- Dimitrios Poulikakos
- Renal Department, Salford Royal NHS Foundation Trust, Salford, United Kingdom
- Centre for Cardiac Research, Institute of Cardiovascular Sciences, The University of Manchester, Manchester, United Kingdom
| | - Katerina Hnatkova
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Sofia Skampardoni
- Renal Department, Salford Royal NHS Foundation Trust, Salford, United Kingdom
- Centre for Cardiac Research, Institute of Cardiovascular Sciences, The University of Manchester, Manchester, United Kingdom
| | - Darren Green
- Renal Department, Salford Royal NHS Foundation Trust, Salford, United Kingdom
- Centre for Cardiac Research, Institute of Cardiovascular Sciences, The University of Manchester, Manchester, United Kingdom
| | - Philip Kalra
- Renal Department, Salford Royal NHS Foundation Trust, Salford, United Kingdom
- Centre for Cardiac Research, Institute of Cardiovascular Sciences, The University of Manchester, Manchester, United Kingdom
| | - Marek Malik
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
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22
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La Manna G, Capelli I. Atrial changes after kidney transplant: what diagnostic and therapeutic perspectives? Transpl Int 2018; 31:975-976. [PMID: 29856511 DOI: 10.1111/tri.13287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Kidney transplant is known to be the first choice therapy for end stage chronic kidney disease, also for its positive effects on kidney transplant recipients cardiovascular morbidity and mortality. Several evidences evaluated the morphological changes of the left ventricle before and after transplantation, demonstrating a positive effect of at least partial regression of left ventricular hypertrophy (LVH) in kidney transplant recipients. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Gaetano La Manna
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Nephrology, Dialysis and Transplantation Unit, St. Orsola Hospital, University of Bologna, Italy
| | - Irene Capelli
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Nephrology, Dialysis and Transplantation Unit, St. Orsola Hospital, University of Bologna, Italy
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