Journal Article Chronic total occlusion Percutaneous coronary intervention Review Acute coronary syndrome Antegrade approach Balloon inflation Cardiac hydatid cyst Case Reports Coil embolization Collateral circulation Collateral derecruitment Contrast echocardiography Coronary artery bypass graft Coronary perforation Drug-eluting stent Eustachian valve Fractional flow reserve Hydatid disease Intravascular ultrasound PCI PFO Post-conditioning Primary PCI Reperfusion injury Severe coronary artery disease Syntax score II Tamponade Unprotected left main disease Ventricular tachycardia