Acute systolic heart failure: symptoms and urgent treatment

Fluid may accumulate in the lungs and body, producing breathlessness, coughing, exhaustion, or swollen legs. Symptoms can represent a new heart problem or a sudden worsening of existing heart failure. This is not suitable for self-treatment because oxygen levels, circulation, rhythm, and the trigger may change quickly.

During systole, the main pumping chamber contracts to send blood around the body. When contraction is weakened, pressure can build behind the heart. Lung congestion makes breathing harder, especially when lying flat, while reduced forward flow may cause cool skin, dizziness, fatigue, or reduced urine output.

Possible triggers include a heart attack, uncontrolled blood pressure, an abnormal heart rhythm, infection, a valve problem, missed medicines, or excess fluid and salt. Clinicians investigate the trigger because treatment must support breathing and circulation while addressing the underlying problem.

For sudden or severe breathlessness, call emergency services and sit upright if that makes breathing easier. Do not drive yourself. Have the medication list, allergy details, previous heart records, and the timing of symptom changes ready for the clinical team.

Do not take extra diuretic, blood-pressure medicine, or another person's heart medicine unless a clinician has provided a specific action plan. Hospital care may involve oxygen support when levels are low, medicines to remove excess fluid or improve circulation, heart monitoring, imaging, and treatment of the precipitating cause.

Seek emergency help for severe breathlessness at rest, gasping, blue or grey lips, chest pressure, collapse, confusion, coughing pink frothy fluid, or cold clammy skin. These features can signal poor oxygen delivery or fluid in the lungs and should not wait for a routine appointment.

People with established heart failure should contact their clinical team promptly for increasing breathlessness, needing more pillows to sleep, rapidly worsening ankle swelling, reduced ability to carry out usual activity, palpitations, or a clear change in weight under their agreed monitoring plan.

Ask what triggered the episode, whether heart rhythm, blood pressure, valves, or coronary blood flow need further attention, and how medicines will change. Clarify the personal limits for fluid and salt, which daily observations to record, when activity can resume, and whom to contact if congestion returns.