Difference between angina pectoris and myocardial infarction

Angina pain site in the left chest back, pain area is small, mainly dull pain, with the development of the disease pain will extend to the upper limbs, left shoulder, usually lasting about ten minutes, pain is more obvious, and myocardial infarction is mainly due to cardiac vascular occlusion caused by strong pain, will last half an hour or even longer, through thrombolytic therapy can be relieved.