What does Grade 3 Heart Disease mean?

Heart disease can be classified into four grades. Grade III heart disease is one of the more severe conditions.

Grade III heart disease, also known as severe heart disease, refers to a disease in which heart function is severely impaired. Grade III heart disease can be classified according to heart function. Grade III heart disease can reflect significant physical activity limitation, usually no symptoms at rest, but discomfort with less than normal physical activity, requiring rest. The main feature of grade III heart disease is a significant decrease in the ability of heart muscles to contract and relax, making it impossible for the heart to pump blood effectively.