For sham operation group, exposeheart by surgery andfindleftanteriordescending (LAD) coronary artery, and then braid to make a ringerbut remain the silk untensioned;
In the year after the procedure, 57 percent of those who had the actual surgery reported the complete elimination of migraine headaches, compared with just 4 percent in the shamsurgerygroup.
In addition, 84 percent of those who had the surgery reported at least a 50 percent reduction in migraine pain compared with just 58 percent in the shamgroup.