People with stress disorders like PTSD are at higher risk of heart disease

People coping with psychological trauma have a heightened risk of developing cardiovascular disease, a large-scale study finds.

Researchers used national health registers to identify 136,637 Swedish patients with no history of cardiovascular disease who were diagnosed with a stress-related disorder — a cluster of mental health conditions, including post-traumatic stress disorder, triggered by acute trauma — from 1987 to 2013. The team compared each of these patients with siblings and with unrelated people of the same age and sex, both of whom had a clear bill of mental and heart health.

In the patients first year after being diagnosed, those with a stress-related disorder had a 64 percent higher risk of developing cardiovascular disease than their siblings without a mental health diagnosis, and a 70 percent higher risk than unrelated patients, the scientists report.

The cardiovascular disease accounted for included heart failure, arrhythmia, stroke, hypertension and heart attack. The study found that those with a stress-related disorder were most vulnerable in the year following their mental health diagnosis: They had four times the relative risk of heart failure compared with their siblings. After one year, the patients with a stress diagnosis had a 29 percent higher risk for all cardiovascular disease than their siblings.

Over the course of 27 years, 10.5 percent of patients with stress-related disorders developed cardiovascular disease — compared with 8.4 percent of the sibling group and 6.9 percent of the general population group.

The study, published April 10 in the British Medical Journal, builds on a growing body of research linking mental health with heart disease.

“Researchers have been connecting mental health and cardiovascular disease for at least 40 years,” says Mary Whooley, a professor of medicine at the University of California, San Francisco, who was not involved in the study. But much of the previous research into the link between psychiatric stress and heart health has focused on populations of male veterans of PTSD, says Whooley, who is also director of cardiac rehabilitation at the San Francisco Veterans Affairs health care system.

“Whats really impressive about this study is the enormous number of patients,” Whooley says. More than half the patients with stress-related disorders were women. By comparing siblings, the study was also able to better control for genetic traits and childhood experiences that might contribute to a persons risk of developing cardiovascular disease.

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