[Happyday] the difference Angina and Myocardial infarction '협심증&심근경색'?! [기분 좋은 날] 20150603

[Happyday] the difference Angina and Myocardial infarction '협심증&심근경색'?! [기분 좋은 날] 20150603

What is the difference Angina and Myocardial infarction ???