Angioplasty vs. heart surgery is a very large topic and there are many excellent reviews in the medical literature if you have a special interest in the topic. In brief however there are 3 situations where
bypassHeart bypass surgery
Heart bypass surgery - series surgery has traditionaly been favored over
angioplastyAngioplasty
Coronary artery balloon angioplasty - series: 1) left main artery disease; 2) 3-vessel disease (all the major vessels of the heart) with depressed heart function and ; 3) In diabetics with 3-vessel disease.
There are many other pros and cons to surgery vs. angioplasty which your husband's doctor can discuss with you. In general the trend is going to more angioplasty and less surgery, particularlly with newer medications and stents. Of course he should also be doing things to reduce his risk of the blockages progressing such as stopping smoking and controlling his blood pressure. Best wishes to you.
Thanks very much.