‘Depression raises heart rate’ – study
MEASURING a person’s heart rate could be a way of spotting if they are suffering from depression.
Depressed people’s hearts beat an extra ten to 15 times per minute on average during the day, a study has found.
Their heart rates fall at night – which is normal as we recover from the stresses and strains of the day – but less so than people who are not depressed.
Scientists discovered this after tracking the heart rates of 16 people with depression and 16 who were not depressed over four days and three nights.
They could predict who had depression, based on heart rate alone, in up to 90% of cases.
Experts believe that depressed people’s hearts may have to work harder because their chronic stress or anxiety means that they are constantly in a low-level state of ‘fight or flight’.
Inflammation in the body caused by poor mental health may also reduce activity of the vagus nerve, which helps to regulate heart rate. The findings mean people could detect early signs of poor mental health in themselves by using a 24-hour fitness tracker to chart their heart rate.
Dr Carmen Schiweck, who led the study at Goethe University in Germany, said: ‘Normally heart rates are higher during the day and lower during the night.
‘It seems that the drop in heart rate during the night is impaired in depression. This seems to be a way of identifying patients who are at risk to develop depression or to relapse.’
Study volunteers, who were a similar age in the depressed and non-depressed groups, wore echocardiogram patches on their chest to monitor their heart rate day and night.
Previous evidence had shown that depressed people did have higher heart rates, but this latest research found that the difference is up to 15 more beats a minute throughout the day.
For the first time, it emerged that people’s heart rates fell less at night if they were depressed.
Daytime heart rates, which also fluctuated less in those with depression, could be used to predict the condition with 81% accuracy. Night-time heart rates were better, achieving an accuracy of 90.6% when a computer programme analysed the readings to provide a diagnosis.
The authors of the study, which was presented at the virtual conference of the European College of Neuropsychopharmacology, caution that heart rate may provide a red flag for depression only in those who are very depressed.
The study’s authors believe that if people can predict depression early, they can take action, such as taking exercise or seeking counselling, to try to cope.
If depression alters heart rate so significantly, this may help explain its link with coronary artery disease and heart failure.
A difference of 15 beats a minute