Shingles said to increase risk of heart attack, stroke

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Brain, Stroke,

According to a research letter published in the Journal of the American College of Cardiology, shingles increase a person’s risk of stroke and heart attack.

Shingles is reactivation of the chickenpox virus and according to Centers for Disease Control and Prevention, almost 1 out of every 3 people in the United States will develop shingles in their lifetime. Anyone who has suffered from chickenpox may develop shingles; however, the risk of shingles increases as a person gets older.

Scientists in South Korea used the National Health Insurance Service’s “medical check-up” database to identify patients with newly diagnosed herpes zoster–or shingles, stroke and heart attack using the relevant International Classification of Disease-10 diagnostics codes.

Researchers followed a total of 519,880 patients from 2003-2013 out of which 23,233 contracted shingles. The final cohort of 23,213 was matched with the same number of shingles-free patients to serve as control subjects.

Patients with shingles were more likely to be female and common risk factors for stroke and heart attack, such as old age, high blood pressure, diabetes and high cholesterol, were also more commonly seen in these patients. However, this group was also less likely to smoke, have a lower alcohol intake, more exercise and be part of a higher socioeconomic class.

Shingles was found to raise the risk of a composite of cardiovascular events including heart attack and stroke by 41 percent, the risk of stroke by 35 percent and the risk of heart attack by 59 percent. The risk for stroke was highest in those under 40 years old, a relatively younger population with fewer risks for atherosclerosis. The risks of both stroke and heart attack were highest the first year after the onset of shingles and decreased with time. However, these risks were evenly distributed in the shingles-free group.

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