What are the most common side effects of heart bypass surgery?

Psychological effect. Depression and anxiety are two common psychological effects associated with heart surgery. You should discuss any psychological symptoms and seek a mental health evaluation in consultation with your PCP.
Many. Keep in mind, "side effects" is a nebulous term. Side effects can be pleasant or unpleasant; probably the best way for me to answer this is to say that the body will need a varying amount of time to recover from major surgery. The best "side effect" should be a healthier, recovering heart, that, after a short period of time, should enable one to live a better quality of life.