Endothelial Dysfunction
Conditions
Keywords
endothelial dysfunction acetylcholine bms ses
Brief summary
This is a prospective, randomised study to compare the endothelial dysfunction of BMS vs SES, both implanted in the same patient with multiple de novo coronary artery lesions undergoing elective PCI. The primary end point will be the evaluation of endothelial dysfunction at 6 months follow-up by measuring the change in vessel diameter in 5 points of the stent and peri-stent site after infusion of acetylcholine.
Detailed description
This prospective, randomised study compares the endothelial dysfunction of BMS vs SES, both implanted in the same patient with multiple de novo coronary artery lesions undergoing elective PCI. From february 2009 to may 2009 we aim to enroll 20 patients with at least two de novo significant angiographic stenoses in different coronary segments who will have similar diameter and length. The primary end point will be the evaluation of endothelial dysfunction at 6 months follow-up by measuring the change in vessel diameter in 5 points of the stent and peri-stent site after infusion of acetylcholine.
Interventions
DRUGintracoronary infusion of acetylcholine
Acetylcholine will be infused at a concentration of 140 microg/minute, over a period of 2 minutes, yielding estimated intracoronary concentrations of 10(-5)mol/L, with the assumption of a flow rate of 80mL/min). All infusions will be delivered at a constant rate using an infusion pump. Subsequently, in order to evaluate the endothelium-independent vasomotor response, 2mg of isosorbide dinitrate or bolus 250microg of nitroglycerine will be infused by intracoronary bolus in all subjects. The response to nitrate will be recorded 1 minute after the bolus. A 3-min period will be allowed to elapse between each drug infusion.
Sponsors
Azienda Ospedaliera San Camillo Forlanini
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 90 Years
Healthy volunteers
No
Inclusion criteria
* stable angina pectoris * at least two significant angiographic stenoses in different native coronary vessels or in the same vessel but two different ramifications with similar diameter * non-surgical patients
Exclusion criteria
* acute coronary syndromes * myocardial infarction within 3 months from event * clinical or angiographic coronary vasospasm * coronary angiographic findings of a fresh thrombus in the initial angiography (filling defect proximal to or involving the stenosis) * coronary anatomy unsuitable for for intracoronary acetylcholine testing (left main coronary artery disease \>30%, surgical three vessel disease or other anatomical considerations that make it unsafe to perform intracoronary studies) * progression of lesions or development of de novo lesions in nontarget lesions or vessels on follow-up angiography * patients with a vessel diameter \< 2,50 mm and length lesions \<10 and \>30 mm. * patients with vessel diameter difference (SES vs BMS) \>0,5mm and length difference of the stenosis \>50% * lesions treated with balloon injury \<10 mm or \>50 mm in length * severe left ventricular (LV) systolic dysfunction * bifurcation/ostial * presence of an unhealed dissection identified by intravascular ultrasound (IVUS) performed at the end of the study. * angiographic restenosis in follow-up angiography * patients with severe risk factors for endothelial dysfunction: severe renal failure, life expectancy less than 1 year, uncontrolled diabetes, uncontrolled hypertension (systolic blood pressure \>180mmHg), currently smoking, uncontrolled hypercholesterolemia (total cholesterol \>240mg/dl) * any contraindication/nontolerance to the use of aspirin, heparin and/or clopidogrel * lack of consent to participate
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| evaluation of endothelial dysfunction at 6 months follow-up by measuring the change in vessel diameter in 5 points of the stent and peri-stent site after infusion of acetylcholine | 6 months | evaluation of change in vessel diameters (vasoconstriction or vasodilatation) in proximal and distal stent territories, after intracoronary acetylcholine infusion, having as reference the baseline diameters, for the BMS artery vs the SES artery |
Countries
Italy
Outcome results
None listed