Stressful experience may result in the inception of asthma, exacerbations, and. inadequate control. In this article we explore the relationship between psy-. chologic stress as an exacerbating factor of asthma and the mechanisms through. which this relationship may exist.
That sort of thing takes months or years. As for brain surgery, many last several hours. If done right, the type of brain surgery known as Deep Brain Stimulation takes at least six or seven hours, to implant electrodes in the target area of the brain.
The length of time for the surgery depends on the type of surgery. CABG, the most common type of heart surgery, usually takes 3 to 5 hours. This answer from the National Heart, Lung and Blood Institute has been reviewed and/or edited by Dr. William D. Knopf.