He also completed fellowships in cardiovascular disease and geriatrics at University Hospitals of Cleveland. It is estimated that 1 to 1.5 million Americans have had atrial fibrillation at some time in their life. The Framingham Heart Study has shown a 22 year incidence of new atrial fibrillation of 21.5 per thousand in men and 17.1 per thousand in women. Atrial fibrillation usually causes the heart to beat fast and irregularly. The ventricles, which are the main lower pumping chambers, contract normally but their rhythm is also fast and irregular.
Atrial fibrillation is associated with many types of heart and lung conditions.
Common associated conditions include hypertension, valvular heart disease, coronary artery disease, heart failure, thyroid disorders, and chronic lung disease. Atrial fibrillation may also occur during times of stress such as during illness or post surgery. The most common symptom is palpitation which can be associated with lightheadedness, dizziness, shortness of breath, chest discomfort and fatigue. Atrial fibrillation can exacerbate symptoms of angina, heart failure and chronic lung disease. Atrial fibrillation, per se, is not a life threatening disorder and usually does not directly lead to a serious consequence such as cardiac arrest, heart attack or death.