I just heard about this news story on five live:
bbc.co.uk/news/health-35347559
"Having an irregular heartbeat poses a greater health risk to women than men, a review of 30 studies, involving more than four million patients, suggests.
The women with atrial fibrillation (AF) were almost twice as likely to have fatal heart disease and strokes.
Women may respond less well to AF drugs or are being diagnosed later than men......."