Atrial fibrillation and heart failure: what to know

Atrial fibrillation, often called AFib, causes an irregular heartbeat. Heart failure means the heart is not pumping or filling effectively enough for the body's needs. Either condition can put added strain on the heart, so changes in breathing, swelling, energy, or heartbeat deserve attention.

A fast or persistently irregular rhythm can reduce how efficiently the heart moves blood and may aggravate heart failure. In the other direction, pressure and stretching within a heart affected by heart failure can make AFib more likely to develop or persist. People with either condition may experience breathlessness, fatigue, palpitations, reduced exercise tolerance, cough, or swollen ankles. Symptoms alone cannot show which condition is changing, so examination and heart tests matter.

Take prescribed medicines exactly as directed, and do not stop a heart-rate, rhythm, fluid, or blood-thinning medicine without clinical advice. Keep a simple record of breathlessness, swelling, palpitations, dizziness, and changes in what you can comfortably do. Bring your medication list to reviews. Your clinician may check pulse, blood pressure, an electrocardiogram, blood tests, and heart structure or pumping function. Treatment is tailored to rhythm or rate control, fluid balance, stroke prevention, and the underlying heart condition.

Call emergency services for severe trouble breathing, chest pain or pressure, fainting, new confusion, blue or grey lips, or sudden weakness or numbness on one side. Seek prompt medical assessment for a sustained racing or irregular heartbeat with dizziness, worsening breathlessness, rapidly increasing swelling, or difficulty lying flat because of breathing. New symptoms or a clear change from your usual pattern should not wait for a routine review.

Ask what heart rate or symptom change should trigger a call, whether you need medicine to reduce stroke risk, how to monitor fluid retention, and which medicines may need blood tests or dose adjustment. Also clarify what activity is suitable for you and whom to contact if symptoms worsen between appointments.