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Faitatzidou D, Dipla K, Theodorakopoulou MP, Koutlas A, Tsitouridis A, Dimitriadis C, Pateinakis P, Zafeiridis A, Papagianni A, Jadoul M, Sarafidis P. Heart rate variability at rest and in response to stress: Comparative study between hemodialysis and peritoneal dialysis patients. Exp Biol Med (Maywood) 2023; 248:1745-1753. [PMID: 37916412 PMCID: PMC10792413 DOI: 10.1177/15353702231198081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 07/10/2023] [Indexed: 11/03/2023] Open
Abstract
Cardiac arrhythmias and sudden death are the leading causes of mortality in end-stage kidney disease (ESKD). Autonomic nervous system (ANS) dysfunction contributes to this arrhythmogenic background. This study compared heart rate variability (HRV) indices between hemodialysis (HD) and peritoneal dialysis (PD) patients, both at rest and in response to mental and physical stimulation maneuvers. Thirty-four HD and 34 PD patients matched for age, sex, and dialysis vintage, and 17 age- and sex-matched controls were studied. ANS function was examined by linear and non-linear HRV indices. Heart rate was recorded continuously (Finometer-PRO) at rest and during ANS maneuvers (orthostatic, mental-arithmetic, sit-to-stand, handgrip exercise tests). At rest, no significant differences between HD and PD were observed in HRV (root mean square of successive differences [RMSSD]: HD = 57.1 ± 81.1 vs PD = 69.6 ± 113.4 ms; P = 0.792), except for detrended fluctuation analysis (DFA-α1) (HD = 0.87 ± 0.40 vs PD = 0.70 ± 0.20; P = 0.047). DFA-α1 was significantly lower in PD than controls (1.00 ± 0.33; P < 0.05). All HRV indices during the mental-arithmetic test (RMSSD: HD = 128.2 ± 346.0 vs PD = 87.5 ± 150.0 ms; P = 0.893) and the physical stress tests were similar between HD and PD. The standard deviation along the line-of-identity (SD2)/the standard deviation perpendicular to the line-of-identity (SD1) ratio during mental-arithmetic was marginally lower in HD and significantly lower in PD than controls (PD = 1.31 ± 0.47 vs controls = 1.79 ± 0.64; P < 0.05). Both dialysis groups presented similar patterns in HRV responses during orthostatic and handgrip exercise tests. After the sit-to-stand, RMSSD, SD1, SD2, and DFA-α2 were higher compared to rest only in HD (RMSSD = 57.1 ± 81.1 vs 126.7 ± 185.7 ms; P = 0.028), suggesting a greater difficulty of HD patients in recovering normal ANS function in response to physical stress. In conclusion, HRV indices at rest and after mental and physical stimulation did not differ between HD and PD; however, the ANS responses following the sit-to-stand test were more impaired in HD. These findings suggest that ANS dysfunction is not largely affected by dialysis modality, but small differences in normal ANS recovery may exist.
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Affiliation(s)
- Danai Faitatzidou
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki GR54642, Greece
| | - Konstantina Dipla
- Exercise Physiology & Biochemistry Laboratory, Department of Sport Sciences at Serres, Aristotle University of Thessaloniki, Thessaloniki GR57001, Greece
| | - Marieta P Theodorakopoulou
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki GR54642, Greece
| | - Aggelos Koutlas
- Exercise Physiology & Biochemistry Laboratory, Department of Sport Sciences at Serres, Aristotle University of Thessaloniki, Thessaloniki GR57001, Greece
| | - Alexandros Tsitouridis
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki GR54642, Greece
| | - Chrysostomos Dimitriadis
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki GR54642, Greece
| | - Panagiotis Pateinakis
- Department of Nephrology, Papageorgiou General Hospital, Thessaloniki GR56429, Greece
| | - Andreas Zafeiridis
- Exercise Physiology & Biochemistry Laboratory, Department of Sport Sciences at Serres, Aristotle University of Thessaloniki, Thessaloniki GR57001, Greece
| | - Aikaterini Papagianni
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki GR54642, Greece
| | - Michel Jadoul
- Cliniques Universitaires Saint Luc, Université Catholique de Louvain, Brussels B-1200, Belgium
| | - Pantelis Sarafidis
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki GR54642, Greece
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Roumeliotis S, Roumeliotis A, Georgianos PI, Thodis E, Schurgers LJ, Maresz K, Eleftheriadis T, Dounousi E, Tripepi G, Mallamaci F, Liakopoulos V. VItamin K In PEritonial DIAlysis (VIKIPEDIA): Rationale and study protocol for a randomized controlled trial. PLoS One 2022; 17:e0273102. [PMID: 35976944 PMCID: PMC9384975 DOI: 10.1371/journal.pone.0273102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 07/20/2022] [Indexed: 11/18/2022] Open
Abstract
Vascular calcification (VC) is an active process, resulting from the disturbance of balance between inhibitors and promoters of calcification, in favor of the latter. Matrix Gla Protein, a powerful inhibitor of VC, needs vitamin K to become active. In vitamin K depletion, plasma levels of the inactive form of MGP, dephosphorylated, uncarboxylated MGP (dp-ucMGP) are increased and associated with VC and cardiovascular (CV) outcomes. End Stage Renal Disease (ESRD) patients have increased circulating dp-ucMGP levels and accelerated VC. VItamin K In PEritoneal DIAlysis (VIKIPEDIA) is a prospective, randomized, open label, placebo-controlled trial, evaluating the effect of vitamin K2 supplementation on arterial stiffness and CV events in ESRD patients undergoing peritoneal dialysis (PD). Forty-four PD patients will be included in the study. At baseline, dp-ucMGP and pulse-wave velocity (PWV) will be assessed and then patients will be randomized (1:1 ratio) to vitamin K (1000 μg MK-7/day) or placebo for 1.5 years. The primary endpoint of this trial is the change in PWV in the placebo group as compared to the treatment group. Secondary endpoints are the occurrence of CV events, mortality, changes in PD adequacy, change in 24-hour ambulatory blood pressure indexes and aortic systolic blood pressure and changes in calcium/phosphorus/parathormone metabolism. VIKIPEDIA is a new superiority randomized, open label, placebo-controlled trial aiming to determine the effect of vitamin K2 supplementation on VC, CV disease and calcium/phosphorus metabolism, in PD patients. Trial registration: The protocol of this study is registered at ClinicalTrials.gov with identification number NCT04900610 (25 May 2021).
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Affiliation(s)
- Stefanos Roumeliotis
- 1st Department of Internal Medicine AHEPA Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
- * E-mail:
| | - Athanasios Roumeliotis
- 1st Department of Internal Medicine AHEPA Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Panagiotis I. Georgianos
- 1st Department of Internal Medicine AHEPA Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Elias Thodis
- Department of Nephrology, School of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Leon J. Schurgers
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht, The Netherlands
| | | | | | - Evangelia Dounousi
- Department of Nephrology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece
| | - Giovanni Tripepi
- CNR-IFC, Clinical Epidemiology and Physiopathology of Renal Diseases and Hypertension, Reggio Calabria, Italy
| | - Francesca Mallamaci
- CNR-IFC, Clinical Epidemiology and Physiopathology of Renal Diseases and Hypertension, Reggio Calabria, Italy
| | - Vassilios Liakopoulos
- 1st Department of Internal Medicine AHEPA Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Alexandrou ME, Sarafidis P, P Theodorakopoulou Μ, Sachpekidis V, Papadopoulos C, Loutradis C, Kamperidis V, Boulmpou A, Bakaloudi DR, Faitatzidou D, Pateinakis P, Papagianni A. Cardiac geometry, function, and remodeling patterns in patients under maintenance hemodialysis and peritoneal dialysis treatment. Ther Apher Dial 2021; 26:601-612. [PMID: 34505350 DOI: 10.1111/1744-9987.13732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/24/2021] [Accepted: 09/07/2021] [Indexed: 01/14/2023]
Abstract
Cardiovascular disease is the leading cause of mortality in patients with end-stage-kidney disease. Evidence on the possible echocardiographic differences between hemodialysis and peritoneal dialysis (PD) is scarce. This study aimed to evaluate differences in left (LA) and right atrial (RA), left (LV) and right ventricular (RV) geometry, systolic and diastolic function in hemodialysis, and PD patients. Thirty-eight hemodialysis and 38 PD patients were matched for age, sex, and dialysis vintage. Two-dimensional and tissue-Doppler echocardiography, and lung ultrasound were performed during an interdialytic day in hemodialysis and before a programmed follow-up visit in PD patients. Vena cava diameter (11.09 ± 4.53 vs. 14.91 ± 4.30 mm; p < 0.001) was significantly lower in hemodialysis patients. Indices of LA, RA, LV, and RV dimensions were similar between the two groups. LVMi (116.91 [38.56] vs. 122.83 [52.33] g/m2 ; p = 0.767) was similar, but relative wall thickness was marginally (0.40 [0.14] vs. 0.45 [0.15] cm; p = 0.055) lower in hemodialysis patients. LV hypertrophy prevalence was similar between groups (73.7% vs. 71.1%; p = 0.798), but hemodialysis patients presented eccentric and PD patients concentric LVH. Regarding ventricular systolic function, stroke volume (p = 0.030) and cardiac output (p = 0.036) were higher in hemodialysis, while RV systolic pressure (RVSP) (20.37 [22.54] vs. 27.68 [14.32] mm Hg; p = 0.009) was higher in PD. No significant differences were evidenced in diastolic function indices and lung water excess between the two groups. A moderate association was noted between ultrasound B-lines score and LA volume index (r = 0.465, p < 0.001), RVSP (r = 0.431, p < 0.001), and E/e' ratio (r = 0.304, p = 0.009). Hemodialysis and PD patients present largely similar echocardiographic indices reflecting cardiac geometry, systolic, and diastolic function, but different patterns of abnormal LV remodeling.
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Affiliation(s)
- Maria-Eleni Alexandrou
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece.,Department of Nephrology, Papageorgiou Hospital, Thessaloniki, Greece
| | - Pantelis Sarafidis
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Μarieta P Theodorakopoulou
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Christodoulos Papadopoulos
- 3rd Department of Cardiology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Charalampos Loutradis
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Vasileios Kamperidis
- 1st Department of Cardiology, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Aristi Boulmpou
- 3rd Department of Cardiology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Dimitra-Rafailia Bakaloudi
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Danai Faitatzidou
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Aikaterini Papagianni
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
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