I think your cardiologist knows best your condition after those 3 stent
placements in your coronary arteries. Since he has changed your medication lately and taken your blood pressure, just be patient and let the medication takes time to work on you. Please remember that being excited and worrying too much can also increase your blood pressure.As it is your BP is on the high side, so stop worrying. By calling up the nurse to relate your condition to your doc is not a good solution. If you are worried, just make an appointment and see your doctor again.If you are below 40, that reading of l45/92 is a bit too high especially the diastolic(below). Try to take care of your diet which I am sure your doc should have advised you espcially cutting down on fatty meat and drink more orange or lemon juice (if you dont have uric acid problem),these juices may help in thinning the blood which should be good for you. Remember also to do light exercises everyday. If you are a Christian, just pray to God and have faith in HIM and leave everything in His hands. Have peace in your mind and your blood pressure will definitely improve.May God Bless you and keep you well, I will pray for you too.