Bypass surgery - necessary?

A study showed that the number of surgeries performed per capita was
proportional to the number of surgeons per capita - even in adjacent
counties with the same socio-economic class. That's scary! I have no
quarrel that bypass surgery can improve the quality of life in
appropiate cases. It just seems to me that drug and diet therapy
should be given a chance to reverse the blockages before spending
$100,000 plus on dangerous surgery that can also result in brain
damage. Apparently 39% of patients can reverse blockage "In the FATS
trial, 39% of patients taking niacin and colestipol
experienced disease regression compared with 11% of patients
in the conventional therapy group"
http://www.niaspan.com/templates/hcp.asp?class=2&page=2 Also there's
the hope that the "liquid drano" will pan out which may make disease
regression routine.