DEFINITION of 'Attribution Rules'. A set of rules created by Canada Revenue Agency (CRA) that prevents investors from transferring assets between family members with the intention of avoiding taxes. Next Up.
Causes of atrial fibrillation. The exact cause of atrial fibrillation is unknown, but it's more common with age and affects certain groups of people more than others. Atrial fibrillation is common in people with other heart conditions, such as: 1  high blood pressure (hypertension). 2  atherosclerosis.3  heart valve disease.4  congenital heart disease.auses of atrial fibrillation. The exact cause of atrial fibrillation is unknown, but it's more common with age and affects certain groups of people more than others. Atrial fibrillation is common in people with other heart conditions, such as: 1  high blood pressure (hypertension). 2  atherosclerosis.
What are the dangers of atrial fibrillation? Stroke; Why does atrial fibrillation cause stroke? What are the symptoms and signs of stroke? Heart failure; What are the symptoms and signs of atrial fibrillation? Some patients with atrial fibrillation may have no symptoms. The commonest symptoms are palpitations (a fluttering sensation in the chest). Other commonly reported symptoms of atrial fibrillation are shortness of breath, tiredness, chest pain, fatigue, dizziness and even loss of consciousness (syncope). The reasons why some people with atrial fibrillation experience symptoms, while others do not, are not completely known.