Myocardial infarction occurs when a portion of the heart's blood supply is cut off, harming the heart's muscle. A distinct and more dangerous condition is cardiac arrest, in which the heart abruptly stops beating efficiently, resulting in collapse and unconsciousness. If a heart attack is not treated right away, it might occasionally result in cardiac arrest. Chest pain, perspiration, dizziness, shortness of breath, or pain radiating to the arm or jaw are typical warning indicators. Both diseases require rapid emergency medical attention.

Improving ejection fraction (heart pumping power) during cardiac arrest depends on the underlying aetiology and appropriate long-term care. Over time, the heart can heal by taking heart medications on a regular basis, managing blood pressure, diabetes, and cholesterol, abstaining from alcohol and tobacco, eating healthy, low-salt foods, walking or performing cardiac rehabilitation as recommended, and keeping a healthy weight. After receiving treatment for clogged arteries or an irregular heartbeat, some patients also experience improvement. Repeat echo tests and routine follow-up with a cardiologist are crucial, and recovery may take several months.