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Clinical Trial Protocol
Comparative Study
Journal Article
Ticagrelor and the Prevention of Microvascular Complications in Diabetes Patients with Lower Extremity Arterial Disease; Rationale and Design of the Hema-Kinesis Trial.
Cardiovascular Drugs and Therapy 2018 October
BACKGROUND: Lower extremity arterial disease (LEAD) occurs more common in patients with diabetes than without diabetes. Microvascular complications of diabetes contribute to higher rates of adverse limb events in patients with LEAD. Blood flow in the macrocirculation and microcirculation is reduced with increasing low-shear and high-shear blood viscosity. We hypothesize that the adenosine enhancing properties of ticagrelor will reduce low-shear blood viscosity and improve microcirculatory flow in the dorsum of the feet of patients with type 2 diabetes. Ticagrelor is a P2Y12 receptor antagonist with evidence of cardiovascular event reduction in patients with acute coronary syndromes and those with a previous myocardial infarction. In a large multicenter trial of patients with symptomatic LEAD and a history of limb revascularization, ticagrelor was no more effective than clopidogrel in reducing cardiovascular disease events; however, this trial was not designed to investigate microvascular complications of diabetes.
DESIGN: Hema-kinesis will evaluate whether ticagrelor monotherapy or ticagrelor combined with aspirin as compared with aspirin monotherapy can reduce blood viscosity-dependent blood flow in the feet of type 2 diabetes patients with LEAD. Eligible study participants will be randomized into a three-arm double-dummy crossover trial design. All subjects will have baseline blood viscosity measurements and determinations of microvascular flow using laser Doppler flowmetry. If the results of Hema-kinesis are positive, ticagrelor should be considered as treatment to reduce microvascular complications of LEAD in patients with type 2 diabetes.
DESIGN: Hema-kinesis will evaluate whether ticagrelor monotherapy or ticagrelor combined with aspirin as compared with aspirin monotherapy can reduce blood viscosity-dependent blood flow in the feet of type 2 diabetes patients with LEAD. Eligible study participants will be randomized into a three-arm double-dummy crossover trial design. All subjects will have baseline blood viscosity measurements and determinations of microvascular flow using laser Doppler flowmetry. If the results of Hema-kinesis are positive, ticagrelor should be considered as treatment to reduce microvascular complications of LEAD in patients with type 2 diabetes.
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