A new study adds to evidence that there is a link between antidepressants and abnormal electrical activity of the heart.
Two SSRIs (citalopram and escitalopram) and one tricyclic antidepressant (amitriptyline) were associated with a prolonged QT interval, a risk factor for rare heart rhythm problems.
NHS Choices has provided an analysis of the research and explanation of the QT interval, which is electrical activity of the heart measured by an electrocardiogram (ECG).