What Afib doesn't kill. Of course it does. Why do we take blood thinners if it doesn't kill? Think of all those poor people in 3rd world countries that do not have access to anti coagulants.
From the above mentioned book "Afib Cure": Atrial fibrillation strikes one in four American adults. Not only do people suffering from this condition suffer from shortness of breath, fatigue, chest discomfort, decreased ability to exercise and do activities of daily living, arrhythmia, and palpitations, but their risk of a stroke, cognitive decline and dementia, heart failure, or premature death also shoots way up."