Impact of low-dose aspirin on coronary artery spasm as assessed by intracoronary acetylcholine provocation test in Korean patients Assessment of Matrix Metalloproteinase-9 Polymorphism in Acute Coronary Syndrome Evaluation of loss of heterozygosity of chromosome 22q11.21 region in patients with congenital heart diseases Risk of Pregnancy in Moderate and Severe Aortic Stenosis From the Multinational ROPAC Registry Influence of Presenting Electrocardiographic Findings on the angiographic outcome, in-hospital morbidity and mortality in patients with non-ST segment elevation myocardial infarction Pregnancy Outcomes in Women With Rheumatic Mitral Valve Disease Results From the Registry of Pregnancy and Cardiac Disease