A prospective study from the UK Biobank concludes that irregular menstrual cycle throughout reproductive life is associated with cardiovascular disease (CVD) Researchers have seen that both long (starting at 35 days) and short (less than 21 days) menstrual cycles are associated with atrial fibrillation. Short menstrual cycles would be associated with increased risk of coronary heart disease and myocardial infarction.
However, menstrual cycle length was not associated with an increase in risk of stroke or heart failure. Researchers believe their findings could be transferred to clinical practice.