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Evaluation of Coronary Microvascular Dysfunction (EVACORY) (EVACORY)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01995955
Recruitment Status : Completed
First Posted : November 27, 2013
Last Update Posted : May 21, 2018
Information provided by (Responsible Party):
University Hospital, Grenoble

Brief Summary:
The proposed study is to validate a new non-invasive imaging technique for evaluation of cardiac microciculation in coronary artery disease with a comparison with validated technique invasive, which is measure of index of myocardial resistance.

Condition or disease Intervention/treatment Phase
Coronary Artery Disease Procedure: a new non-invasive imaging technique Not Applicable

Detailed Description:

Coronary microvascular dysfunction is closely associated with coronary artery disease, it is an independent risk factor and predicts future coronary events or clinically manifest disease up to 10 years later.

Index of microcirculatory resistance (IMR) is a validated method to Assessment of the Coronary Microcirculation but this is an invasive technique.

In this study, we use a new mathematic technique from homogeneity analysis to provide precise, objective, automated quantification of perfusion heterogeneity at stress with new camera CZT SPECT. We compare the results with those of the measurement of IMR.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 45 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: The Proposed Study is to Validate a New Non-invasive Imaging Technique for Evaluation of Cardiac Microciculation in Coronary Artery Disease With a Comparison With Validated Technique Invasive, Which is Measure of Index of Myocardial Resistance
Actual Study Start Date : June 24, 2013
Actual Primary Completion Date : December 10, 2016
Actual Study Completion Date : April 2018

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: a new non-invasive imaging technique
a new non-invasive imaging technique for evaluation of cardiac microciculation in coronary artery disease
Procedure: a new non-invasive imaging technique
a new non-invasive imaging technique for evaluation of cardiac microciculation in coronary artery disease

Primary Outcome Measures :
  1. coronary microcirculation [ Time Frame: day 0 (inclusion) ]
    IMR was measured with commercially available software (St Jude Medical Systems) and thermodilution technique on a non-ischemic artery SPECT. Injections of 3 mL of room-temperature saline were made down the coronary artery, and the resting mean transit time (Tmn) was measured. CFR was calculated as resting Tmn divided by hyperemic Tmn. FFR was calculated by the ratio of Pd/Pa at maximal hyperemia.IMR was defined as distal coronary pressure multiplied by the hyperemic mean transit time (mm Hg • seconds, or units [U]). Myocardial Heterogeneity Index (Hi) was measured by an automated analysis developed in our research unit. Hi was finally calculated from images SPECT using a Markovian analysis. For this study Hi is given by the equation: Hi = Σm [1/(1+m)2]Pd(m).

Secondary Outcome Measures :
  1. scintigraphy [ Time Frame: day 0 (inclusion) ]
    An FFR value of 0.80 or less identifies ischemia-causing coronary stenoses. The global summed stress score (SSS) was calculated by adding the scores of the 17 segments in the stress and rest images, respectively. Scans were considered as normal when SSS was < 4.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Stable angina
  • Cadmium-zinc-telluride gamma camera SPECT
  • Coronarography

Exclusion Criteria:

  • Pregnant woman
  • Patient with terminal illness,
  • Terminal Renal failure
  • Allergy to iodine
  • Contraindications for adenosine: Asthmatic patients, Second- or third-degree AV block without a pacemaker or sick sinus syndrome, Systolic blood pressure less than 90mm Hg, Recent use of dipyridamole or dipyridamole-containing medications, Methyl xanthenes such as aminophylline caffeine or theobromine block the effect of adenosine and should be held for at least 12 hours prior to the test, Known hypersensitivity to adenosine, Unstable acute myocardial infarction or acute coronary syndrome

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01995955

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University Hospital of Grenoble
Grenoble, Isère, France, 38700
Sponsors and Collaborators
University Hospital, Grenoble
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Principal Investigator: BARONE ROCHETTE MD Gilles University Hospital, Grenoble
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Responsible Party: University Hospital, Grenoble Identifier: NCT01995955    
Other Study ID Numbers: 2012-A00986-37
First Posted: November 27, 2013    Key Record Dates
Last Update Posted: May 21, 2018
Last Verified: May 2018
Keywords provided by University Hospital, Grenoble:
Coronary Microvascular Dysfunction
coronary artery disease
index of myocardial resistance
Additional relevant MeSH terms:
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Coronary Artery Disease
Myocardial Ischemia
Coronary Disease
Heart Diseases
Cardiovascular Diseases
Arterial Occlusive Diseases
Vascular Diseases