Be aware that OMEGA-3 has anti agregants effects, therefore I would not use it one week before of any intervention.
In the other hand, there are studies that show better recovery if high dose of Q10 has been used before the cardiac intervention.
However, going into the operation theater, I would not take anything without previously discuss it with the doctor.
Jesus
There are rumours of many things in diets which are supposed to help, but lack the actual evidence. Some research has shown slight benefits with omega, while others have shown increase in disease. The ideas come from simple basic thinking. For example, with omega they wondered how eskimos could eat fat and be heart disease free, so they looked at the content of fish meat which they eat lots of. Of course, this showed up Omega oils so they ASSUMED it must be this. I have read that most people in developed countries lack both vitamin C and E, so taking these supplements are now supposed to help. However, vitamin E is a fat soluble vitamin, so it must be the jelly type capsules which also contain a drop of fat. I read a report a short while ago where a Doctor believed a vitamin in Carrots helps reduce lung cancer. He took subjects, gave them supplements and lung cancer increased, which shocked everyone. So I take what I read about with a pinch of salt. If blood tests reveal you are lacking something, then obviously take supplements. There is nothing better than a 'balanced healthy diet' to get everything you need. Oily fish and many types of nuts contain Omega.