The Association Between Systemic Microvascular Endothelial Function and Coronary Physiology Indexes
Study Details
Study Description
Brief Summary
The present study evaluates skin microvascular reactivity and coronary physiology in the same coronary artery disease (CAD) patients.
This study is expected to find associations between systemic microvascular reactivity, measured non-invasively at the skin surface, and coronary reserve evaluated by the invasive angiographic method.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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N/A |
Detailed Description
Introduction: Microvascular reactivity (MR) evaluated in the skin has been proposed as representative of systemic endothelial function, including coronary circulation. There is a lack of studies investigating the association between skin MR and invasive evaluation of coronary reserve. Objective: To evaluate skin MR and coronary physiology in the same coronary artery disease (CAD) patients. Methods: Transversal study, recruiting adult patients with indication for elective coronary angiographic study for the evaluation of CAD by an independent medical team. The evaluation of microvascular cutaneous blood flow of the forearm will use laser speckle contrast imaging (LSCI) coupled with acetylcholine iontophoresis. Coronary physiology will be evaluated in the same patients and in the same day with coronary angiography with lesion assessment by fractional flow reserve (FFR, after intracoronary adenosine administration) and contrast fractional flow reserve (cFFR, after intracoronary contrast media administration), with measurements of hyperemic intravascular pressures. FFR and cFFR will be performed in vessels with intermediate lesions, as evaluated in quantitative angiography. Expected results: This study is expected to find associations between systemic MR, measured non-invasively at the skin surface, and coronary reserve evaluated by the invasive angiographic method.
Study Design
Outcome Measures
Primary Outcome Measures
- Assessment by fractional flow reserve (FFR) and contrast fractional flow reserve (cFFR). [day 1 visit to the hemodynamic laboratory]
Physiological coronary artery obstruction assessment through FFR and cFFR. For FFR and cFFR measurement, a 0.014FR guidewire will be advanced distal to the lesion, with baseline and hyperemic (after adenosine or contrast administration) vascular pressure measurements, with two-minute interval between each measurement.
Secondary Outcome Measures
- Systemic microvascular reactivity [day 1 visit to the hemodynamic laboratory]
Laser-based method for evaluating non-invasive, operator-independent systemic microvascular function that detects microvascular flow in the skin for the evaluation of systemic vascular endothelial function.
Eligibility Criteria
Criteria
Inclusion Criteria:
- Patients with intermediate obstructive coronary artery disease (40-80% lumen obstruction of epicardial vessels or 30-60% obstruction of left main coronary artery).
Exclusion Criteria:
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ST elevation myocardial infarction in the first 72 hours of evolution.
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Allergy to contrast media or adenosine
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Asthma or chronic obstructive pulmonary artery disease diagnosis
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Ongoing acute coronary syndrome
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Systolic blood pressure under 90mmHg
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Baseline arrhythmias or advanced atrioventricular blockade
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Advanced arterial calcification
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Renal failure (defined as serum creatinine above 1.5mg/dl)
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Saphenous graft or mammary artery graft anastomosis stenosis
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Severe left ventricular systolic dysfunction.
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | National Institute of Cardiology | Rio de Janeiro | Brazil | 21040-360 |
Sponsors and Collaborators
- National Institute of Cardiology, Laranjeiras, Brazil
Investigators
None specified.Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- CAAE: 28368620.7.0000.5272