Atrial fibrillation can occur in all species when there is '''atrial dilation''' secondary to other cardiac lesions.
Atrial fibrillation can occur in all species when there is '''atrial dilation''' secondary to other cardiac lesions.
−
−
In horses it may be detected unexpectedly during an examination of an animal with no history of heart disease. The atrial contraction only contributes to around 15% of the ventricular filling, so signs of atrial fibrillation are only seen during vigorous exercise.
−
−
In cattle it occurs most commonly in animals with abnormalities of the gastrointestinal tract.