In people with heart failure, the heart isn't able to pump enough blood around their body. As a result, their organs, muscles and other types of tissue do not get enough oxygen. Heart failure is also sometimes referred to as congestive heart failure (CHF) or cardiac insufficiency.
Heart failure can be acute, like after a heart attack, or it may develop over time, for example because of permanently high blood pressure or coronary artery disease.
Depending on how severe heart failure is, it may go unnoticed, only cause minor symptoms, or really affect your physical fitness. People who have advanced heart failure find it hard to carry out normal everyday activities. Various treatments can relieve the symptoms and help you live longer.