Chronic Heart Failure

Key facts

• Chronic heart failure (CHF) occurs when the heart muscle is permanently weakened or stiffened and can no longer pump blood with enough force to supply the body's organs.
• It is a progressive condition managed rather than cured, most often driven by longstanding high blood pressure, coronary artery disease, or uncontrolled diabetes.
• Breathlessness on exertion, ankle and leg swelling, and persistent fatigue are the hallmark symptoms.
• Treatment combines beta-blockers such as carvedilol or bisoprolol, ARBs such as candesartan or valsartan, sacubitril/valsartan, and dapagliflozin.

What drives the condition forward

Heart failure is almost always the downstream result of another problem. Longstanding high blood pressure, coronary artery disease, and uncontrolled diabetes are the most common upstream causes. As the heart compensates, it remodels, enlarging or thickening, and this remodelling itself worsens function over time. Fluid builds up in the lungs and lower limbs because the kidneys respond to poor circulation by retaining salt and water.

Symptoms worth watching

Breathlessness on exertion, and eventually at rest, ankle and leg swelling, and persistent fatigue are the hallmark complaints. A dry cough, especially when lying flat, and a rapid or irregular heartbeat are also common. Symptoms tend to worsen gradually, but a sudden sharp deterioration, new breathlessness at rest, coughing up frothy or pink sputum, or chest pain, needs urgent medical attention the same day.

How heart failure is managed today

Treatment targets the neurohormonal pathways that accelerate the disease. Beta-blockers such as carvedilol and bisoprolol slow the heart and reduce harmful adrenaline signalling. Angiotensin-receptor blockers like candesartan or valsartan lower blood pressure and ease the heart's workload. The combination medicine sacubitril, paired with valsartan, goes further by also blocking natriuretic peptide breakdown, which has meaningfully reduced hospital admissions in trials.

More recently, dapagliflozin, originally developed for type 2 diabetes, has shown clear survival benefit in heart failure regardless of whether a patient has diabetes, and is now a guideline-recommended option. Alongside medicines, a low-salt diet, daily weight monitoring, and graduated physical activity form the backbone of self-care for most people with CHF, and the full range of heart and blood pressure medicines covers related treatment needs.

This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.