ST Elevation Myocardial Infarction Clinical Trial
Official title:
Supplemental Oxygen in Catheterized Coronary Emergency Reperfusion
The aim of SOCCER is to evaluate the effects of treatment with supplemental O2 before and during acute balloon angioplasty (PCI) for patients with ST-elevation myocardial infarction (STEMI). One hundred STEMI patients are randomized in the ambulance to either standard O2 treatment (10 l/min) or no supplemental O2, to be given until the end of the acute PCI. Cardiac magnetic resonance imaging and echocardiography during the hospital stay is used to assess infarct size and myocardial performance. All patients are followed for 6 months. At 6 months, perceived health and NT-proBNP are recorded for all patients, and an additional echocardiography is performed. The primary endpoint is the fraction of myocardium saved with the acute PCI. The secondary endpoints include the pain difference between inclusion time and start of PCI and myocardial performance on echocardiography.
Almost all patients with ST elevation myocardial infarction (STEMI) in Sweden undergo acute
balloon angioplasty (PCI) to open the occluded coronary artery, and thereby to reduce or
abolish the myocardial infarction. Standard treatment in these cases is 10-15 l of
supplemental oxygen to reduce the myocardial ischemia and the infarct size. It is, however,
unknown whether supplemental O2 is beneficial or detrimental to patients with STEMI
undergoing PCI.
This study aims to evaluate the effects of treatment with supplemental O2 in acute PCI for
STEMI.
The study is a multicenter single blind parallel group randomized trial. One hundred
normoxic STEMI ambulance patients accepted for primary PCI are randomized in the ambulance
to either standard O2 treatment (10 l/min) or no supplemental O2, to be given until the end
of the acute PCI. All patients undergo cardiac MRI at day 4-6 to determine area at risk,
infarct size and myocardial salvage index. Fifty patients undergo an extended
echocardiography during the hospital stay to assess infarct size and wall motion score
index. All patients are followed for 6 months. At 6 months, perceived health (EQ-5D) and
NT-proBNP are recorded for all patients, and an additional echocardiography is performed for
the subgroup of 50 patients. The primary endpoint is myocardial salvage index. Secondary
endpoints include pain difference between inclusion time and start of PCI and wall motion
score index on echocardiography.
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Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment
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