Abnormal electrical signals
Atrial fibrillation is probably a diagnosis you have heard of, if not because a friend or family member has it, because it has been mentioned in a public advertisement or pharmaceutical commercial. Atrial fibrillation (or “A-fib”) is the most common cardiac arrhythmia, a condition estimated by the American Heart Association to be present in more than five million Americans.
A-fib happens when abnormal electrical signals occurring throughout the cardiac atria (upper chambers of the heart) override the normal intrinsic electrical pacemaker. Sometimes this causes symptoms such as heart palpitations, dizziness, poor exercise tolerance, or heart failure. In many cases, however, patients have no symptoms at all. I can recall numerous instances of finding A-fib in a patient simply by listening to their heart on a routine exam and finding the heart rhythm to be irregular.The widespread use of smartwatches and other monitoring devices is alerting people to the possibility of A-fib with greater frequency.
