Comparing Ticagrelor Versus Clopidogrel on Microcirculation

Status Completed

Clinical Trial Summary

Recently, data (PLATO) from an AstraZeneca study of platelet inhibition and patient outcomes, a Phase III pivotal efficacy and safety study with a duration of up to 12 months comparing ticagrelor 90 mg twice daily dosing to clopidogrel 75 mg once daily dosing in acute coronary syndrome patients on ASA background, have demonstrated superiority of ticagrelor over clopidogrel in the prevention of fatal and non-fatal cardiovascular events. Currently, the mechanism for this mortality reduction remain uncertain. One hypothesis is a adenosine mediated theory that ticagrelor has been shown to enhance adenosine-induced vasodilation. Several experimental and clinical studies support the hypothesis that adenosine could reduce cardiac ischaemia reperfusion damage. Moreover, recent study has demonstrated that ticagrelor enhances adenosine-induced coronary vasodilatory responses in healthy humans. However, there are no available data on coronary circulation effects after chronic treatment of ticagrelor in patients with ACS who have altered resting coronary blood flow dynamics due to advanced coronary artery disease.

Clinical Trial Description

This study is a prospective, randomized, open-label, active controlled study with two parallel study groups.

For inclusion in the study subjects should fulfill the following criteria:

1. Provision of informed consent prior to any study specific procedures

2. Female or male aged 20-85 years

3. All patients with ACS scheduled for PCI will be eligible, assuming their ability to understand the character and individual consequences of participation as well as giving written informed consent.

4. Be able to understand and comply with the requirements of the study, as judged by the investigator.

To investigate the effects of ticagrelor on coronary microcirculation, IMR will be measured twice, 6 months apart in the same lesion, compared with clopidogrel.

The IMR is defined as simultaneously measured distal coronary pressure divided by the inverse of the thermodilution-derived hyperaemic mean transit time (Tmn), or more simply, distal coronary pressure multiplied by the Tmn. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT02618733
Study type	Interventional
Source	Dong-A University
Contact
Status	Completed
Phase	N/A
Start date	December 2014
Completion date	December 31, 2016

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Comparing Ticagrelor Versus Clopidogrel on Microcirculation — PLEIO

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms