Impact of Vascular Reparative Therapy on Vasomotor Function and Myocardial Perfusion:a Randomized H215O PET/CT Study (VANISH)

Amsterdam UMC, location VUmc

Status

Unknown

Conditions

Coronary Artery Disease

Treatments

Device: Bioresorbable vascular scaffold

Device: Xience Prime

Study type

Interventional

Funder types

Other

Identifiers

NCT01876589

VANISH

Details and patient eligibility

About

The purpose of this study is to examine the improvement of myocardial blood flow induced by regained vasomotor functions of the stented coronary segment after resorption of BVS over time.

Full description

Objective The objective of the proposed study is to determine the impact of VRT, in comparison with conventional drug-eluting stenting, on endothelium dependent vasodilation and maximal hyperemic myocardial perfusion using H215O PET.

Study design The study is designed as a single center single-blind randomized clinical trial and will be conducted at the VU University Medical Center in Amsterdam.

Summary of the study design It is hypothesized that VRT will result in augmented endothelium dependent coronary vasodilation and maximal myocardial perfusion as compared with conventional stenting of a coronary lesion. Within one year sixty patients (age 18-65) with documented single vessel CAD (type A or B1 lesion) accepted for PCI based on clinical grounds and according to current international guidelines, will be asked to participate in this trial. Patients will be randomized to implantation of a drug-eluted stent (Xience Prime) or BRS (Absorb). The patients will be blinded to the nature of the implanted device. H2 15O PET will be performed one month (reference scan), one year, and three years after the PCI procedure (resolution of BRS is generally complete within a three year period). The PET protocol will consist of three MBF measurements: resting MBF, during endothelial dependent vasodilation provoked by coldpressor-testing (CPT), and during (endothelial dependent and independent) maximal vasodilation by infusion of adenosine intravenously. After three years a control invasive coronary angiogram will document any potential obstructive coronary lesions that may affect the MBF measurements.

Primary study parameters/outcome of the study MBF measurements: resting MBF, during endothelial dependent vasodilation provoked by cold-pressor-testing (CPT), and during (endothelial dependent and independent) maximal vasodilation by infusion of adenosine intravenously

Secondary study parameters/outcome of the study Obstructive coronary lesions on control invasive coronary angiogram that may affect the MBF measurements.

Enrollment

60 patients

Sex

All

Ages

18 to 65 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Patients with documented obstructive CAD by invasive coronary angiography resulting in myocardial ischemia (either documented by invasive (i.e. fractional flow reserve, FFR) or noninvasive imaging techniques (e.g. exercise ECG, myocardial perfusion imaging, or inducibility of wall motion abnormalities during dobutamine stress).
Presence of a single, de-novo lesion in a native coronary artery (type A or B1), with a reference vessel diameter of at least 3.0 mm and a diameter stenosis of 50% or more and less than 100%, with a thrombolysis in myocardial infarction (TIMI) flow grade of at least 2. Coronary lesion must be amendable for successful treatment with one of the following BRS device dimensions: length 18 or 28 mm, diameter 3.0 or 3.5 mm.

Exclusion criteria

age of 65 or above
refusal or inability to provide written informed consent
other than single CAD
abnormal echocardiographic findings (i.e. wall motion abnormalities, ventricular hypertrophy, valvular disease etc.)
complex coronary lesion characteristics (e.g. lesions located in the left main coronary artery, lesions involving a side branch more than 2 mm in diameter, and the presence of thrombus or another clinically significant stenosis in the target vessel)
poor kidney function defined as an eGFR < 30 ml/min
astma or chronic obstructive pulmonary disease
other than sinus rhythm
pregnancy
bail out stenting after placement of the study device