Protective Effect of Coronary Collaterals on Infarct Size in Patients With Acute Myocardial Infarction

Insel Gruppe AG, University Hospital Bern

Status: Withdrawn

Conditions: Myocardial Infarction

Study type: Observational

Funder types: Other

Identifiers

NCT00412672

37/01

Details and patient eligibility

About

The hypothesis of the current proposal is that collateral flow is an important determinant of myocardial protection during an ischemic event. Increased collateral flow for any given area at risk will decrease the myocardial damage caused by the occlusion of the infarct related epicardial artery.

It is further hypothesized that myocardial salvage provided by collateral flow will decrease infarct size and this in turn will decrease LV dilatation post-myocardial infarction.

Full description

The hypothesis of the current proposal is that collateral flow is an important determinant of myocardial protection during an ischemic event. Increased collateral flow for any given area at risk will decrease the myocardial damage caused by the occlusion of the infarct related epicardial artery.

It is further hypothesized that myocardial salvage provided by collateral flow will decrease infarct size and this in turn will decrease LV dilatation post-myocardial infarction.

The two primary endpoints are infarct size as assessed by increase of biochemical cardiac markers and coronary collateral perfusion index (CPI) as obtained by transthoracic MCE.

Extent of LV remodelling, i.e., LV dilatation as assessed by serial assessment of LV dimension by LV angiogram and/or echocardiography, respectively.

Sex: All

Ages: 18 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients with acute myocardial infarction with electrocardiographic criterion and/or typical history of angina pectoris and planned revascularisation according to the acute myocardial infarction disease management guidelines of the University Hospital Bern. Including both, patients undergoing primary PCI and patients referred for rescue PCI after failed thrombolytic therapy
• Patients > 18 years old of either sex
• Patients who have given informed consent to the study

Exclusion criteria

• Patients unable to give informed consent e.g. because of mechanical ventilation
• Patients with cardiogenic shock
• Patients with myocardial infarction secondary to occlusion of a recently revascularized vessel (subacute stent thrombosis)
• Patients with severe arrhythmias
• Patients whose door-to-balloon time exceeds 120 minutes
• Pregnancy