Hello. Welcome to HCM and thank you for your question. I understand your concern. First, I am sorry about your husband s condition. Due to myocardial infarction, a part of the cardiac muscle undergoes necrosis ( dies ). This death augment a complex process in the organism, to compensate for the situation. There is an estimated risk of death and major cardiovascular events in the first 11 days after every myocardial infarction. Of course, these risks vary in probabilities, according to the artery that has caused the attack, but every scenario is possible. Stenting and opening a blocked artery, causative of the heart attack, within 6 hours after the onset of the pain, is accompanied with good outcomes and the heart can benefit a great deal, in terms of regaining the function, but this can be assessed only 3-6 months after the attack, after the myocardium (heart muscle) is un-stunned . At this moment, the main worries and preoccupation is about his basic health and vital signs, since this is a critical moment. As about the other arteries, we usually deal with them at least two weeks after the infarction. In the first moment of arrival, we only deal with the culprit artery. The doctor has tried to explain to you that the right coronary artery (RCA) was totally closed, but chronically, not acutely. Therefore, it did not cause infarction, because, due to the nature of chronic and slow closure, some little vessels (called inter-coronary collaterals) were opened to support the zone of RCA with oxygen and nutrients. These arteries probably are supplied with blood from left circumflex (LCx) artery and ramus intermedius (RI) artery. Hopefully, the stent procedure and the life support went well, and this critical moment has passed. I hope I was helpful with my answer. Take care. Good luck. Dr. Meriton