Dyspnea and Heart Failure: What to Know

When the heart's pumping or filling is impaired, pressure can rise in the blood vessels of the lungs. Fluid may then move into lung tissue, making breathing harder. Breathlessness may appear during walking, climbing stairs, or lying flat, and some people wake at night needing to sit upright. Heart failure can also present with tiredness, cough, rapid weight change from fluid, or [Swollen Ankles](/symptoms/swollen-ankles/).

High blood pressure and rhythm problems such as [Atrial Fibrillation](/conditions/atrial-fibrillation/) can place extra strain on the heart. Symptoms may be gradual or may worsen quickly, so a new change deserves review rather than a guess about the cause.

Take prescribed medicines as directed and do not stop them because breathing improves. Track when breathlessness occurs, whether you need extra pillows, ankle swelling, cough, palpitations, and changes in your usual activity. Follow your clinician's advice about fluids, salt, exercise, and daily monitoring. Arrange a [Chronic Disease Review](/treatments/consultations-and-assessment/chronic-disease-review/) if symptoms are persistent, returning, or changing.

Call emergency services for severe breathlessness at rest, inability to speak in full sentences, blue or grey lips, fainting, confusion, or chest pain. Urgent assessment is also needed if breathing suddenly worsens, you cough pink or frothy fluid, or symptoms appear with a very fast or irregular heartbeat. Sit upright while waiting for help and take only medicines already prescribed for this situation.

Ask whether your symptoms suggest fluid congestion, how to monitor them at home, which changes require same-day contact, and whether your heart medicines or rhythm need review.