Atrial fibrillation is an irregular rhythm originating in the heart’s upper chambers (atria). It can cause palpitations, breathlessness or fatigue. Diagnosis and ongoing management are usually led by cardiology; below are general, non-personal medical information on symptoms, evaluation and specialty referrals.
Atrial fibrillation occurs when disorganized electrical activity in the atria disrupts the heart’s regular rhythm. The condition may be intermittent (paroxysmal), sustained (persistent) or permanent. Irregular atrial activation can affect how effectively the heart pumps and may lead to variations in heart rate. Clinical assessment typically combines medical history, physical examination and rhythm recordings.
Common complaints include a sensation of rapid or irregular heartbeat (palpitations), shortness of breath, reduced exercise tolerance, chest discomfort and occasional lightheadedness. Some people have mild or no symptoms. When present, symptoms can interfere with daily activities and quality of life, so discussing them with a clinician helps guide further evaluation.
Initial evaluation often includes a resting electrocardiogram (ECG). If symptoms are intermittent, longer monitoring such as a Holter recorder or event monitor may be used. Echocardiography assesses heart structure and function; blood tests can identify contributing conditions (for example, thyroid dysfunction). A cardiologist decides which tests are appropriate.
Known risk factors include high blood pressure, coronary artery disease, valvular heart disease, thyroid disorders, obesity, obstructive sleep apnoea and advancing age. Tobacco use, excess alcohol and uncontrolled chronic illnesses can increase risk. Addressing modifiable factors and regular medical follow-up are part of reducing long-term risk.
Severe chest pain, sudden severe breathlessness, fainting or sudden loss of consciousness require immediate emergency evaluation. For non-urgent care, cardiology is the principal specialty for diagnosis and management. Family medicine physicians play a key role in initial assessment and chronic disease coordination. When needed, referrals may include cardiac electrophysiology, heart failure clinics or cardiac surgery teams.
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