Location and size of myocardial infarction depends on the location of the coronary occlusion and on whether one coronary artery is dominant over the other in supplying different regions of the heart. This mainly affects the inferior and lateral walls which may get their blood supply from a dominant right coronary artery or a dominant circumflex branch of the left coronary artery. The size of the diagonal branches may also play a role. In the following simulation you may choose different locations for coronary occlusion and thus get a visual impression of the correlation between the location of coronary occlusion and the resulting size of the infarcted area.