Changes

==Clinical Signs==

==Clinical Signs==

===Horses===

===Horses===

This may be an '''incidental finding''' on clinical examination, especially if the horse is not used for highly athletic activities. If the horse is raced, hunted or an eventer, then signs may occur during exercise and include '''exercise intolerance''', reluctance to exercise or a poor performance during exercise. It can be associated with '''[[Exercise Induced Pulmonary Haemorrhage|exercise induced pulmonary haemorrhage]]''', so this can be a clinical sign of the condition.

This may be an '''incidental finding''' on clinical examination, especially if the horse is not used for highly athletic activities. The atrial contraction only contributes to around 15% of the ventricular filling, so signs of atrial fibrillation are only seen during vigorous exercise. If the horse is raced, hunted or an eventer, then signs may occur during exercise and include '''exercise intolerance''', reluctance to exercise or a poor performance during exercise. It can be associated with '''[[Exercise Induced Pulmonary Haemorrhage|exercise induced pulmonary haemorrhage]]''', so this can be a clinical sign of the condition.

===Cattle===

===Cattle===