End Stage Renal Failure on DialysisPhase 2VISTANCT02324686
Vitamin K Supplementation in Patients on Hemodialysis
A Phase 2 study testing vitamin K1 in people with End Stage Renal Failure on Dialysis and Atrial Fibrillation, run by University Health Network, Toronto at 1 site in Canada.
Trial summary
The purpose of this study is to determine whether vitamin K supplementation will improve anticoagulation control in patients on hemodialysis taking warfarin for atrial fibrillation. Patients who participate will receive vitamin K1 three times a week on dialysis days for a period of four months. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- End Stage Renal Failure on Dialysis, Atrial Fibrillation
- What is being tested?
- vitamin K1
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 3 participants
- Where
- 1 siteCanada
- Study dates
- Jan 2014to 18 Dec 2017
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- greater than 18 years of age
- Receiving in-house hemodialysis for at least 6 months
- Previously diagnosed with atrial fibrillation
- On warfarin for at least 6 months with a target INR of 2-3
Who cannot join
- are unable to provide informed consent
- have a mechanical heart valve
- are receiving supplements containing vitamin K
- have a known hypersensitivity to vitamin K
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Vitamin K Supplementation to Improve INR Stability in Patients on Hemodialysis Taking Warfarin for Atrial Fibrillation
The purpose of this study is to determine whether vitamin K supplementation will improve anticoagulation control in patients on hemodialysis taking warfarin for atrial fibrillation. Patients who participate will receive vitamin K1 three times a week on dialysis days for a period of four months. INR levels collected during this period will be compared to the four month period prior to receiving the vitamin K1 to determine if vitamin K improves the standard deviation of INRs and time in therapeutic range.
Read the detailed description
Patients on hemodialysis with atrial fibrillation are at increased risk of stroke. These patients often take warfarin to reduce this risk. Warfarin is a drug that is used to prevent clots in the bloodstream. The dose of warfarin varies from person to person, and its effect is measured using a blood test called the international normalized ratio (INR). In most patients with atrial fibrillation the goal is to keep the INR between 2 and 3. Patients on hemodialysis often have unstable INR levels. Vitamin K supplementation has been shown to improve INR control in patients on warfarin but has not yet been studied in hemodialysis patients.
In this study, patients on hemodialysis receiving warfarin for atrial fibrillation will receive vitamin K 400 mcg orally three times a week on dialysis days for 4 months. INR levels in the four months before and the four months while receiving vitamin K will be reviewed.
The primary end point will look at INR stability and be measured by calculating the standard deviation of INR values before and after receiving vitamin K. The goal of this study is to determine whether vitamin K supplementation improves INR control in patients on hemodialysis taking warfarin for atrial fibrillation.
- Being tested
- vitamin K1
- Keywords
- Warfarin, International Normalized Ratio, Vitamin K
- Medical subject headings
- Atrial Fibrillation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
vitamin K1Drug
Also called phytonadione
Vitamin K1 400 mcg orally three times a week on dialysis days for four months
| Study group | Role | What they receive |
|---|---|---|
| Vitamin K1 | Other | Vitamin K1 400 mcg orally three times a week on dialysis days for four months Receives: Drug: vitamin K1 |
What is being measured
The primary outcome is the main question the study is designed to answer.
INR stability (standard deviation of INR values)
standard deviation of INR values, 4 months before and 4 months after the intervention
Measured: 4 months before and 4 months after intervention
Secondary outcomes (2)
Time in Therapeutic Range (Percentage of time INR levels within range)
, 4 months before and 4 months after the intervention
Measured: 4 months before and 4 months after intervention
Adverse events
Number and types of thromboembolic and bleeding complications, 4 months before and 4 months after the intervention
Measured: 4 months before and 4 months after intervention
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Dec 2014 (estimated)
- Study startJan 2014
- Primary completion18 Dec 2017
- Study completion18 Dec 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (25)Papers the sponsor has linked to this study.
- Other trials for End Stage Renal Failure on DialysisStudies of the same condition, open and under way.
- More trials run by University Health Network, TorontoThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 3 participants (actual)
Sponsor and investigators
- Lead sponsor
- University Health Network, Toronto
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Marisa Battistella, Principal investigator, University Health Network, Toronto
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02324686
- Sponsor's protocol ID
- 14-8200
- Acronym
- VISTA
- Status last verified
- May 2016
- First submitted
- 19 Dec 2014
- Last updated
- 6 Feb 2018
- Results posted
- No
- Data monitoring committee
- No
- Individual data sharing
- Undecided: When the study is complete aggregate data of the study will be published and shared. Individual participant data that may identify participants will not be shared. If a participant requests information on his/her individual participant data, it will be provided to the requesting participant.
Publications
Reinecke H, Engelbertz C, Schabitz WR. Preventing stroke in patients with chronic kidney disease and atrial fibrillation: benefit and risks of old and new oral anticoagulants. Stroke. 2013 Oct;44(10):2935-41. doi: 10.1161/STROKEAHA.113.001701. Epub 2013 Sep 5. No abstract available.
PubMed 24008579Sood MM, Komenda P, Sood AR, Rigatto C, Bueti J. The intersection of risk and benefit: is warfarin anticoagulation suitable for atrial fibrillation in patients on hemodialysis? Chest. 2009 Oct;136(4):1128-1133. doi: 10.1378/chest.09-0730.
PubMed 19809054Shah M, Avgil Tsadok M, Jackevicius CA, Essebag V, Eisenberg MJ, Rahme E, Humphries KH, Tu JV, Behlouli H, Guo H, Pilote L. Warfarin use and the risk for stroke and bleeding in patients with atrial fibrillation undergoing dialysis. Circulation. 2014 Mar 18;129(11):1196-203. doi: 10.1161/CIRCULATIONAHA.113.004777. Epub 2014 Jan 22.
PubMed 24452752Marinigh R, Lane DA, Lip GY. Severe renal impairment and stroke prevention in atrial fibrillation: implications for thromboprophylaxis and bleeding risk. J Am Coll Cardiol. 2011 Mar 22;57(12):1339-48. doi: 10.1016/j.jacc.2010.12.013.
PubMed 21414530Skanes AC, Healey JS, Cairns JA, Dorian P, Gillis AM, McMurtry MS, Mitchell LB, Verma A, Nattel S; Canadian Cardiovascular Society Atrial Fibrillation Guidelines Committee. Focused 2012 update of the Canadian Cardiovascular Society atrial fibrillation guidelines: recommendations for stroke prevention and rate/rhythm control. Can J Cardiol. 2012 Mar-Apr;28(2):125-36. doi: 10.1016/j.cjca.2012.01.021.
PubMed 22433576January CT, Wann LS, Alpert JS, Calkins H, Cigarroa JE, Cleveland JC Jr, Conti JB, Ellinor PT, Ezekowitz MD, Field ME, Murray KT, Sacco RL, Stevenson WG, Tchou PJ, Tracy CM, Yancy CW; American College of Cardiology/American Heart Association Task Force on Practice Guidelines. 2014 AHA/ACC/HRS guideline for the management of patients with atrial fibrillation: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the Heart Rhythm Society. J Am Coll Cardiol. 2014 Dec 2;64(21):e1-76. doi: 10.1016/j.jacc.2014.03.022. Epub 2014 Mar 28. No abstract available.
PubMed 24685669Sood MM, Larkina M, Thumma JR, Tentori F, Gillespie BW, Fukuhara S, Mendelssohn DC, Chan K, de Sequera P, Komenda P, Rigatto C, Robinson BM. Major bleeding events and risk stratification of antithrombotic agents in hemodialysis: results from the DOPPS. Kidney Int. 2013 Sep;84(3):600-8. doi: 10.1038/ki.2013.170. Epub 2013 May 15.
PubMed 23677245Clase CM, Holden RM, Sood MM, Rigatto C, Moist LM, Thomson BK, Mann JF, Zimmerman DL. Should patients with advanced chronic kidney disease and atrial fibrillation receive chronic anticoagulation? Nephrol Dial Transplant. 2012 Oct;27(10):3719-24. doi: 10.1093/ndt/gfs346.
PubMed 23114898Gebuis EP, Rosendaal FR, van Meegen E, van der Meer FJ. Vitamin K1 supplementation to improve the stability of anticoagulation therapy with vitamin K antagonists: a dose-finding study. Haematologica. 2011 Apr;96(4):583-9. doi: 10.3324/haematol.2010.035162. Epub 2010 Dec 29.
PubMed 21193422Sconce E, Avery P, Wynne H, Kamali F. Vitamin K supplementation can improve stability of anticoagulation for patients with unexplained variability in response to warfarin. Blood. 2007 Mar 15;109(6):2419-23. doi: 10.1182/blood-2006-09-049262. Epub 2006 Nov 16.
PubMed 17110451Cushman M, Booth SL, Possidente CJ, Davidson KW, Sadowski JA, Bovill EG. The association of vitamin K status with warfarin sensitivity at the onset of treatment. Br J Haematol. 2001 Mar;112(3):572-7. doi: 10.1046/j.1365-2141.2001.02635.x.
PubMed 11260056Sconce E, Khan T, Mason J, Noble F, Wynne H, Kamali F. Patients with unstable control have a poorer dietary intake of vitamin K compared to patients with stable control of anticoagulation. Thromb Haemost. 2005 May;93(5):872-5. doi: 10.1160/TH04-12-0773.
PubMed 15886802Holbrook A, Schulman S, Witt DM, Vandvik PO, Fish J, Kovacs MJ, Svensson PJ, Veenstra DL, Crowther M, Guyatt GH. Evidence-based management of anticoagulant therapy: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines. Chest. 2012 Feb;141(2 Suppl):e152S-e184S. doi: 10.1378/chest.11-2295.
PubMed 22315259Lam J, Schulman S, Witt DM, Vandvik PO, Qayyum F, Holbrook AM. Anticoagulation control with daily low-dose vitamin k to reduce clinically adverse outcomes and international normalized ratio variability: a systematic review and meta-analysis. Pharmacotherapy. 2013 Nov;33(11):1184-90. doi: 10.1002/phar.1302. Epub 2013 Jun 6.
PubMed 23744743Rombouts EK, Rosendaal FR, Van Der Meer FJ. Daily vitamin K supplementation improves anticoagulant stability. J Thromb Haemost. 2007 Oct;5(10):2043-8. doi: 10.1111/j.1538-7836.2007.02715.x. Epub 2007 Jul 31.
PubMed 17666020
Study at a glance
From the registry record, last updated by the sponsor on 6 Feb 2018. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Vitamin K Supplementation to Improve INR Stability in Patients on Hemodialysis Taking Warfarin for Atrial Fibrillation
- ClinicalTrials.gov ID
- NCT02324686
- Acronym / sponsor ID
- VISTA / 14-8200
- Keywords
- Warfarin, International Normalized Ratio, Vitamin K
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 3 participants (actual)
- Lead sponsor
- University Health Network, TorontoUniversity, hospital or other
- Study start
- Jan 2014
- Primary completion
- 18 Dec 2017 (actual)
- Study completion
- 18 Dec 2017 (actual)
- First posted
- 24 Dec 2014 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to determine whether vitamin K supplementation will improve anticoagulation control in patients on hemodialysis taking warfarin for atrial fibrillation. Patients who participate will receive vitamin K1 three times a week on dialysis days for a period of four months. INR levels collected during this period will be compared to the four month period prior to receiving the vitamin K1 to determine if vitamin K improves the standard deviation of INRs and time in therapeutic range.
Detailed description
Patients on hemodialysis with atrial fibrillation are at increased risk of stroke. These patients often take warfarin to reduce this risk. Warfarin is a drug that is used to prevent clots in the bloodstream. The dose of warfarin varies from person to person, and its effect is measured using a blood test called the international normalized ratio (INR). In most patients with atrial fibrillation the goal is to keep the INR between 2 and 3. Patients on hemodialysis often have unstable INR levels. Vitamin K supplementation has been shown to improve INR control in patients on warfarin but has not yet been studied in hemodialysis patients.
In this study, patients on hemodialysis receiving warfarin for atrial fibrillation will receive vitamin K 400 mcg orally three times a week on dialysis days for 4 months. INR levels in the four months before and the four months while receiving vitamin K will be reviewed.
The primary end point will look at INR stability and be measured by calculating the standard deviation of INR values before and after receiving vitamin K. The goal of this study is to determine whether vitamin K supplementation improves INR control in patients on hemodialysis taking warfarin for atrial fibrillation.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Vitamin K1 | Other | Drug: vitamin K1Vitamin K1 400 mcg orally three times a week on dialysis days for four months |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- greater than 18 years of age
- Receiving in-house hemodialysis for at least 6 months
- Previously diagnosed with atrial fibrillation
- On warfarin for at least 6 months with a target INR of 2-3
Key exclusion criteria (4 listed)
- are unable to provide informed consent
- have a mechanical heart valve
- are receiving supplements containing vitamin K
- have a known hypersensitivity to vitamin K
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| vitamin K1Also: phytonadioneVitamin K1 400 mcg orally three times a week on dialysis days for four months | Drug | Vitamin K1 |
Primary outcome
INR stability (standard deviation of INR values)
Time frame: 4 months before and 4 months after intervention
standard deviation of INR values, 4 months before and 4 months after the intervention
2 secondary outcomes
Time in Therapeutic Range (Percentage of time INR levels within range)
Time frame: 4 months before and 4 months after intervention
Adverse events
Time frame: 4 months before and 4 months after intervention
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Feb 2018.
- Background: PubMed 24008579Reinecke H, Engelbertz C, Schabitz WR. Preventing stroke in patients with chronic kidney disease and atrial fibrillation: benefit and risks of old and new oral anticoagulants. Stroke. 2013 Oct;44(10):2935-41. doi: 10.1161/STROKEAHA.113.001701. Epub 2013 Sep 5. No abstract available.
- Background: PubMed 19809054Sood MM, Komenda P, Sood AR, Rigatto C, Bueti J. The intersection of risk and benefit: is warfarin anticoagulation suitable for atrial fibrillation in patients on hemodialysis? Chest. 2009 Oct;136(4):1128-1133. doi: 10.1378/chest.09-0730.
- Background: PubMed 24452752Shah M, Avgil Tsadok M, Jackevicius CA, Essebag V, Eisenberg MJ, Rahme E, Humphries KH, Tu JV, Behlouli H, Guo H, Pilote L. Warfarin use and the risk for stroke and bleeding in patients with atrial fibrillation undergoing dialysis. Circulation. 2014 Mar 18;129(11):1196-203. doi: 10.1161/CIRCULATIONAHA.113.004777. Epub 2014 Jan 22.
- Background: PubMed 21414530Marinigh R, Lane DA, Lip GY. Severe renal impairment and stroke prevention in atrial fibrillation: implications for thromboprophylaxis and bleeding risk. J Am Coll Cardiol. 2011 Mar 22;57(12):1339-48. doi: 10.1016/j.jacc.2010.12.013.
- Background: PubMed 22433576Skanes AC, Healey JS, Cairns JA, Dorian P, Gillis AM, McMurtry MS, Mitchell LB, Verma A, Nattel S; Canadian Cardiovascular Society Atrial Fibrillation Guidelines Committee. Focused 2012 update of the Canadian Cardiovascular Society atrial fibrillation guidelines: recommendations for stroke prevention and rate/rhythm control. Can J Cardiol. 2012 Mar-Apr;28(2):125-36. doi: 10.1016/j.cjca.2012.01.021.
- Background: PubMed 24685669January CT, Wann LS, Alpert JS, Calkins H, Cigarroa JE, Cleveland JC Jr, Conti JB, Ellinor PT, Ezekowitz MD, Field ME, Murray KT, Sacco RL, Stevenson WG, Tchou PJ, Tracy CM, Yancy CW; American College of Cardiology/American Heart Association Task Force on Practice Guidelines. 2014 AHA/ACC/HRS guideline for the management of patients with atrial fibrillation: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the Heart Rhythm Society. J Am Coll Cardiol. 2014 Dec 2;64(21):e1-76. doi: 10.1016/j.jacc.2014.03.022. Epub 2014 Mar 28. No abstract available.
- Background: PubMed 23677245Sood MM, Larkina M, Thumma JR, Tentori F, Gillespie BW, Fukuhara S, Mendelssohn DC, Chan K, de Sequera P, Komenda P, Rigatto C, Robinson BM. Major bleeding events and risk stratification of antithrombotic agents in hemodialysis: results from the DOPPS. Kidney Int. 2013 Sep;84(3):600-8. doi: 10.1038/ki.2013.170. Epub 2013 May 15.
- Background: PubMed 23114898Clase CM, Holden RM, Sood MM, Rigatto C, Moist LM, Thomson BK, Mann JF, Zimmerman DL. Should patients with advanced chronic kidney disease and atrial fibrillation receive chronic anticoagulation? Nephrol Dial Transplant. 2012 Oct;27(10):3719-24. doi: 10.1093/ndt/gfs346.
- Background: PubMed 21193422Gebuis EP, Rosendaal FR, van Meegen E, van der Meer FJ. Vitamin K1 supplementation to improve the stability of anticoagulation therapy with vitamin K antagonists: a dose-finding study. Haematologica. 2011 Apr;96(4):583-9. doi: 10.3324/haematol.2010.035162. Epub 2010 Dec 29.
- Background: PubMed 17110451Sconce E, Avery P, Wynne H, Kamali F. Vitamin K supplementation can improve stability of anticoagulation for patients with unexplained variability in response to warfarin. Blood. 2007 Mar 15;109(6):2419-23. doi: 10.1182/blood-2006-09-049262. Epub 2006 Nov 16.
- Background: PubMed 11260056Cushman M, Booth SL, Possidente CJ, Davidson KW, Sadowski JA, Bovill EG. The association of vitamin K status with warfarin sensitivity at the onset of treatment. Br J Haematol. 2001 Mar;112(3):572-7. doi: 10.1046/j.1365-2141.2001.02635.x.
- Background: PubMed 15886802Sconce E, Khan T, Mason J, Noble F, Wynne H, Kamali F. Patients with unstable control have a poorer dietary intake of vitamin K compared to patients with stable control of anticoagulation. Thromb Haemost. 2005 May;93(5):872-5. doi: 10.1160/TH04-12-0773.
- Individual participant dataSharing planned: Undecided. When the study is complete aggregate data of the study will be published and shared. Individual participant data that may identify participants will not be shared. If a participant requests information on his/her individual participant data, it will be provided to the requesting participant.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Marisa Battistella principal investigator
University Health Network, Toronto
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing vitamin K1 in people with End Stage Renal Failure on Dialysis and Atrial Fibrillation, run by University Health Network, Toronto at 1 site in Canada.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 6 Feb 2018. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Canada. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
INR stability (standard deviation of INR values) (time frame: 4 months before and 4 months after intervention). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02324686, which also lists 25 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Feb 2018.