The study looked at more than 3,000 employed men, aged 19-70, whose heart health was checked in the workplace between 1992 and 1995.
All of the employees were asked to rate the leadership style of their senior managers.
Overall, 74 cases of fatal and non-fatal heart attacks were reported during the study.
Staff who ranked their mangers to be the least competent had a higher risk of suffering a heart attack compared with staff who ranked their managers as being highly competent.
The researchers, from the Karolinska Institute in Stockholm, suggest that having a good manager can help to reduce stress-related physiological processes in employees.
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