iFR Guided Multi-vessel Revascularization During Percutaneous Coronary Intervention for Acute Myocardial Infarction

Study design:

The study is a prospective, randomized controlled, multicentre study.

Study population:

The research population will be recruited from the general patient population presenting with an acute STEMI. Patients treated with successful primary PCI and one or more additional significant coronary lesions in another coronary artery will be enrolled in the study. A total of 1,146 consecutive patients will be included.

Intervention:

The patients will be randomized 1:1, to (A) an active treatment arm with complete, iFR-guided revascularization of every noninfarct coronary lesion >50% and iFR ≤0.89; (B) a deferred treatment arm, in which patients will undergo an adenosine stress perfusion CMR scan within 6 weeks after STEMI, with revascularization of the noninfarct coronary lesions with associated perfusion defects.

Main study parameters/endpoints:

The primary end point consists of a combined outcome, including all-cause death, recurrent MI and hospitalization for heart failure at 3 years follow-up.

Duration:

Anticipated recruitment is 2 years. Follow-up will be performed at 6 months, 12 months, 3 years and 5 years.

Inclusion criteria

• Age 18 years and older
• Clinical presentation of STEMI and successful primary PCI within 12 hours from onset of symptoms
• One or more other, noninfarct coronary artery lesions of >50% stenosis and feasible to be revascularized (i.e., minimal diameter 2mm)

Exclusion criteria

• History of ST-elevation myocardial infarction or coronary artery bypass graft
• Hemodynamic instability, respiratory failure, Kilips class ≥III
• Known GFR<30 ml/min
• Known contra-indications for stress CMR (e.g.: severe claustrophobia, metal implants, severe renal failure, severe astma)
• Refusal or inability to provide informed consent
• Life expectancy due to noncardiovascular co-morbidity of less than 12 months
• Chronic total occlusion
• Left main stem stenosis (>50%)
• Residual noninfarct lesion in infarct coronary artery
• Complex noninfarct target lesions
• Pregnancy