Fig. 1From: Optimal strategy of primary percutaneous coronary intervention for acute myocardial infarction due to unprotected left main coronary artery occlusion (OPTIMAL): study protocol for a randomised controlled trialOPTIMAL study design flowchart. Abbreviations: AMI acute myocardial infarction, OPTIMAL Optimal Strategy of Primary Percutaneous Coronary Intervention for Acute Myocardial Infarction due to Unprotected Left Main Coronary Artery OcclusionBack to article page