Exercise and Cardiac Measures in Dialysis Patients
Effects of Exercise Training on Non-invasive Cardiac Measures in Patients Undergoing Long-term Hemodialysis: A Randomized Controlled Trial
Background: The impact of the known non-invasive cardiac indices for identification of hemodialysis (HD) patients at high-risk for sudden cardiac death (SCD) has not been evaluated.
Patients: Fifty-nine HD patients were randomized into 2 groups. Thirty of them (group A-aged 54.6±8.9 years) participated in a supervised training program with stationary bicycles during their HD sessions (3/weekly) for 10 months, while the rest (group B-aged 53.2±6.1 years) remained untrained and were used as controls.
Study hypothesis: Exercise training will affect most of the non-invasive cardiac markers of SCD and the total score positively.
Method: At entry, as well as at the end of the study all subjects underwent a cardiopulmonary exercise testing (estimation of aerobic capacity-VO2peak), an echocardiographic study (LV ejection fraction -LVEF evaluation), an ambulatory 24-hour Holter monitoring for cardiac autonomic nervous system activity evaluation by time- and frequency- domain heart rate variability (HRV) calculation (measurement of SDNN, mean RR and low to high frequency ratio-LF/HF), a signal-averaged ECG (late potentials-LP documentation) and a submaximal exercise test for microvolt-T-wave alternans (TWA) detection.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
The identification of patients on hemodialysis (HD) at increased cardiac risk with powerful screening tests and the reduction of factors, which increase the probability of malignant arrhythmias are important for primary prevention of sudden cardiac death (SCD).
Study Design: randomized and controlled clinical trial. Setting & Participants: Fifty-nine HD patients were randomized into exercise training group (group A-30 patients) and controls (group B-29 patients).
Intervention: Group A participated in a 10-month supervised exercise training program during the HD sessions (3/weekly).
Outcomes: The effects of exercise on the score of the non-invasive cardiac markers for SCD risk stratification and on the occurrence of each variable separately. Statistical analysis included a two-group comparison of change scores and an analysis of covariance adjusting for baseline.
Measurements: At entry and the end of the study, in all participants aerobic capacity (VO2peak) and left ventricular ejection fraction (LVEF) were estimated, late potentials and T-wave alternans were detected and heart rate variability was calculated. Specifically, from the 24-h Holter monitoring the standard deviation of all the normal R-R intervals (SDNN), the mean R-R intervals (mean RR), the low (LF) and high (HF) frequency components of the autoregressive power spectrum of the NN intervals and their ratio (LF/HF) were recorded.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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-
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Thessaloniki, Grækenland, 546 35
- Laboratory of Sports Medicine
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-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- on HD for at least 6 months
- in sinus rhythm
- able to reach a sufficient workload during ergometry
Exclusion Criteria:
- with bundle branch block
- unstable hypertension
- diabetes mellitus
- severe congestive heart failure
- recent myocardial infarction
- unstable angina
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Screening
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Tredobbelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Eksperimentel: exercise training
10-month exercise training program
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10-month exercise training program during hemodialysis sessions
Andre navne:
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Ingen indgriben: controls
usual care sedentary lifestyle
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
The composite risk score
Tidsramme: at entry and after 10 months
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at entry and after 10 months
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
aerobic capacity (VO2peak)
Tidsramme: At entry and after 10 months
|
At entry and after 10 months
|
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Left ventricular ejection fraction (EF)- echocardiography
Tidsramme: At entry and after 10 months
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At entry and after 10 months
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standard deviation of normal R-R intervals- SDNN (holter monitoring)
Tidsramme: At entry and after 10 months
|
At entry and after 10 months
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positive T-wave alternans and Late potentials
Tidsramme: At entry and after 10 months
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At entry and after 10 months
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Evangelia J Kouidi, Associate Pr, Aristotle University of Thessaloniki, Greece
Publikationer og nyttige links
Generelle publikationer
- Bernier-Jean A, Beruni NA, Bondonno NP, Williams G, Teixeira-Pinto A, Craig JC, Wong G. Exercise training for adults undergoing maintenance dialysis. Cochrane Database Syst Rev. 2022 Jan 12;1(1):CD014653. doi: 10.1002/14651858.CD014653.
- Kouidi EJ, Grekas DM, Deligiannis AP. Effects of exercise training on noninvasive cardiac measures in patients undergoing long-term hemodialysis: a randomized controlled trial. Am J Kidney Dis. 2009 Sep;54(3):511-21. doi: 10.1053/j.ajkd.2009.03.009. Epub 2009 Jul 30.
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- RenalRehab
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