Cardiac failure is a serious medical condition that affects the ability of the heart to pump blood to the rest of the body. There are many synonyms for the term 'cardiac failure' such as heart failure, congestive heart failure, and left-sided heart failure. Each term describes the same condition and indicates that the heart is not functioning as it should. Symptoms of cardiac failure include shortness of breath, fatigue, swollen ankles, and a rapid or irregular heartbeat. If left untreated, cardiac failure can lead to serious complications such as kidney damage, liver damage, and even death. Early diagnosis and treatment are crucial in managing this condition.