Warfarin and Coronary Calcification Project (WACC)
23. august 2012 opdateret af: Todd C. Villines, Walter Reed Army Medical Center
The purpose of the study is to assess whether the use of warfarin, a commonly used anticoagulation drug, is associated with increased amounts of coronary artery calcification.
Studies in animals and preliminary but small retrospective studies in humans have suggested a possible link to increased tissue calcification with use of this drug.
The researchers will investigate this by assessing the amount of calcification seen in the coronary arteries using a specialized computed tomography (CT) scan (electron-beam CT) and assessing to see if the amount is influenced by the amount of time a patient has been taking warfarin.
The researchers will exclude patients with known coronary artery disease, chronic kidney disease or hyperparathyroidism.
Studieoversigt
Status
Afsluttet
Betingelser
Undersøgelsestype
Observationel
Tilmelding (Faktiske)
70
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
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District of Columbia
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Washington, District of Columbia, Forenede Stater, 20307
- Walter Reed Army Medical Center
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Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
18 år og ældre (Voksen, Ældre voksen)
Tager imod sunde frivillige
Ingen
Køn, der er berettiget til at studere
Alle
Prøveudtagningsmetode
Ikke-sandsynlighedsprøve
Studiebefolkning
Patients without known coronary heart disease, disorders of calcium metabolism or chronic kidney disease aged > 18 years who are referred to take or currently taking warfarin and are followed in the Anticoagulation Management Clinic at Walter Reed Army Medical Center (WRAMC).
Beskrivelse
Inclusion Criteria:
- Age 18 years of age or older
- Patients referred to begin or already treated with warfarin anticoagulation therapy.
Exclusion Criteria:
- Known prior myocardial infarction or coronary heart disease
- History of advanced chronic kidney disease manifested by serum creatinine>2 or calculated glomerular filtration rate (GFR)<30
- History of hyperparathyroidism
- Current hypercalcemia
- Current hyperphosphatemia
- Uncertain duration of warfarin therapy
- Lack of records documenting international normalized ratio (INR) during therapy
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Kohorter og interventioner
Gruppe / kohorte |
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1
Warfarin use < 6 months
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2
Warfarin use 6-24 months
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3
Warfarin use >24 months
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Coronary Calcification (Presence and Degree as Measured by Agatston Score) Attributed to Duration of Warfarin Use in Months After Controlling for Standard Cardiovascular Risk Factors to Include the Framingham Risk Score
Tidsramme: EBCT scan is done at time of enrollment of patient into 1 of 3 groups based on warfarin use duration: <6 months; 6-24 months; >24 mos.
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The Agatston score is calculated using a non-contrast computed tomography (CT) scan to measure for the presence and severity of coronary artery disease through identification of calcification in the coronary arteries.
Scores can range from 0 to several thousands.
The measure is without units.
Score categories are as follows: 0 = no coronary disease; 1-100 = low amount of coronary artery disease; 101-400 = moderately elevated score / moderate coronary artery disease; 401-1000 = severely elevated score; >1000 very severely elevated score.
Higher Agatston scores corelate with more coronary artery disease and predict a higher risk of coronary heart disease events and mortality.
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EBCT scan is done at time of enrollment of patient into 1 of 3 groups based on warfarin use duration: <6 months; 6-24 months; >24 mos.
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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International Normalized Ratio
Tidsramme: EBCT scan is done at time of enrollment of patient into 1 of 3 groups based on warfarin use duration: <6 months; 6-24 months; >24 mos.
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The International Normalized Ratio (INR) is a standardized lab value that measures the intensity of anticogulation using warfarin.
It is used to monitor patients taking warfarin.
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EBCT scan is done at time of enrollment of patient into 1 of 3 groups based on warfarin use duration: <6 months; 6-24 months; >24 mos.
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Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Sponsor
Publikationer og nyttige links
Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.
Hjælpsomme links
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart
1. maj 2004
Primær færdiggørelse (Faktiske)
1. januar 2010
Studieafslutning (Faktiske)
1. januar 2010
Datoer for studieregistrering
Først indsendt
24. marts 2009
Først indsendt, der opfyldte QC-kriterier
24. marts 2009
Først opslået (Skøn)
25. marts 2009
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
24. august 2012
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
23. august 2012
Sidst verificeret
1. august 2012
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- WU# 04-12020
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .
Kliniske forsøg med Koronar forkalkning
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