Considered a chronic condition, it tends to develop slowly over time. However, patients may experience a sudden onset of symptoms, which is known as acute heart failure. Congestive heart failure is defined as blood backing up into the liver, abdomen, lower extremities, and lungs.

An electrocardiogram is an important test in suspected heart attacks. It should be done within 10 minutes of being admitted to hospital. An ECG measures the electrical activity of your heart. Every time your heart beats, it produces tiny electrical impulses.

The three types of heart attacks are: a) ST segment elevation myocardial infarction (STEMI) b) non-ST segment elevation myocardial infarction (NSTEMI) c) coronary spasm, or unstable angina.