No Link Between Bypass Surgery, Memory Loss
Underlying Heart Disease, Not Surgery, Linked to Subtle Mental Decline
Combination of Risk Factors Predicts Mental Decline
The researchers then performed a second study to determine which people with
coronary artery disease are most likely to experience memory loss and other
The study involved about 150 heart patients who underwent bypass surgery,
150 heart patients who took medication, and 69 people with no known risk
factors for heart disease.
“As expected, people who were older and had less education experienced
faster cognitive decline,” Selnes says. Having plaque buildup in all three of
the main heart arteries and a history of irregular heartbeats known as atrial
fibrillation also predicted faster memory loss and mental decline.
But people with coronary artery disease at greatest risk of mental decline
were those with a combination of risk factors, including high blood pressure, a
past stroke, and diabetes, the study showed.
Blackstone tells WebMD that many of the risk factors for coronary artery
disease, such as high blood pressure and smoking, are also risk factors for
plaque buildup in the brain and cognitive decline.
“If you do things to prevent one, you can prevent the other,” he says.