I should also point out that Ventricular and Atrial (Xeno's experience) Fibrillation are quite different. The atria help fill the ventricles - an atrium in fibrillation is NOT as serious as a ventricle...ventricles in fibrillation are absolutely life threatening - your heart no longer pumps blood!
If you enjoyed this post or other information on the site, subscribe to the Rowing Science Newsletter for regular updates and exclusive insider information for subscribers only.