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Functional Assessment of Coronary Artery Disease by CTA Flow Encoding

4. december 2017 opdateret af: Johns Hopkins University
The purpose of this pilot study proposal is to test the ability of Transluminal Flow Encoding (TAFE) to evaluate vessel specific ischemia in patients with a clinical indication for invasive coronary angiography (ICA) with fractional flow reserve (FFR) measurements for suspected coronary disease.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

The purpose of this pilot study is to test the ability of Transluminal Flow Encoding (TAFE) to evaluate vessel specific ischemia in patients with a clinical indication for invasive coronary angiography (ICA) with fractional flow reserve (FFR) measurements for suspected coronary disease. TAFE is a novel method that derives coronary blood flow from easily obtainable non-invasive coronary CT angiograms.

Participants will undergo a rest coronary CTA, a regadenoson stress CT, and a clinically indicated invasive coronary angiogram. The study aims to determine the accuracy of TAFE compared to invasive fractional flow reserve.

We hypothesize that TAFE-derived coronary blood flow, coronary flow reserve, and myocardial CT perfusion imaging can accurately diagnose an abnormal FFR (<0.80) measured in vessels in patients undergoing invasive coronary angiography.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

19

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • Maryland
      • Baltimore, Maryland, Forenede Stater, 21287
        • Johns Hopkins University

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

40 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Patients with symptoms suspicious for obstructive coronary artery disease who will undergo cardiac catheterization.

Beskrivelse

Inclusion Criteria:

  • Inclusion Criteria A. Male or female patients, age 40 years and older. Women of child bearing potential must demonstrate a negative pregnancy test within 24 hours of the study CT.

B. Referral for invasive coronary angiography for a suspicion of coronary artery disease with possible percutaneous intervention planned.

C. Able to understand and willing to sign the Informed Consent Form.

Exclusion Criteria:

A. Patients with a known history of coronary artery bypass surgery. B. Current or previous ST elevation myocardial infarction (MI), prior MI (confirmed by persistent pathologic Q waves on ECG, clinical reports of CPK-MB or Troponin > three times the upper limit of normal or a fixed perfusion defect on nuclear imaging) C. Current evidence of acute myocardial ischemia, unstable angina, or cardiovascular instability including troponin > than the limit of detection (≥0.06 ng/ml), new ST depression > 1 mm, hypotension with a systolic pressure <90 mm Hg.

D. Known allergy to iodinated contrast media

E. Known or suspected intolerance or contraindication to beta-blockers including:

  1. Known allergy to beta-blockers
  2. History of moderate to severe bronchospastic lung disease (including moderate to severe asthma) F. Known allergy to regadenoson or aminophylline. G. Any patient not deemed medically stable by a physician. F. Known or suspected severe symptomatic aortic stenosis. G. Severe hypertrophic obstructive cardiomyopathy. H. Evidence of severe symptomatic heart failure (NYHA Class III or IV) at the time of the scan.

I. Inability to lie flat. J. Atrial fibrillation or uncontrolled tachyarrhythmia, or advanced atrioventricular block (second or third degree heart block) K. Elevated serum creatinine (> 1.5mg/dl) OR calculated creatinine clearance of < 60 ml/min (using the Cockcroft-Gault formula) L. History of contrast-induced nephropathy M. Severe pulmonary disease or other disorder that does not allow patient to hold breath for 10 seconds or more.

N. History of organ transplantation O. Acute myocarditis or pericarditis. P. Recent history of illicit drug use (past 3 months) Q. Recent use of dipyridamole containing medications. R. Current pregnancy.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Diagnostic Accuracy of Coronary Computed Tomography Angiography (CTA), myocardial CT perfusion and TAFE to predict invasive FFR
Tidsramme: 2 years

We will test the diagnostic accuracy of Coronary CTA, myocardial CT perfusion, and transluminal attenuation flow encoding (TAFE) to predict fractional flow reserve (FFR). Coronary CTA and myocardial CT perfusion results will be dichotomous, either normal or abnormal. Coronary CTA will be defined as abnormal when there is a > or = 50% diameter stenosis in a coronary vessel. Myocardial CT perfusion will be defined as abnormal when there is a visually determined myocardial perfusion deficit. TAFE will be a continuous variable in units of ml/min.

The reference standard will be invasive fractional flow reserve (FFR). FFR will be defined as abnormal when it is less than 0.80.
2 years

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Diagnostic Accuracy of TAFE-derived coronary blood flow to predict invasive FFR
Tidsramme: 2 years
We will test the diagnostic accuracy of TAFE derived coronary blood flow in ml/min to predict and abnormal FFR (<0.80)
2 years

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Johns Hopkins University

Efterforskere

  • Ledende efterforsker: Armin R Zadeh, MD, Johns Hopkins University

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 (Faktiske)

1. oktober 2014

Primær færdiggørelse (Faktiske)

31. december 2016

Studieafslutning (Faktiske)

31. december 2016

Datoer for studieregistrering

Først indsendt

3. november 2014

Først indsendt, der opfyldte QC-kriterier

5. november 2014

Først opslået (Skøn)

7. november 2014

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

6. december 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

4. december 2017

Sidst verificeret

1. december 2017

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • NA_00091805

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 .

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