Classification | Cause of coronary heart disease

Classification

There are 4 degrees of severity of coronary narrowing, corresponding to the reduction of the vessel cross-section:

  • Grade I is present when the diameter is 35-49% smaller
  • Grade II is a reduction of 50-74% (significant stenosis)
  • Grade III means a narrowing of 75-99% (critical stenosis) and in
  • Grade IV is a complete occlusion or a 100% reduction of the vessel diameter.

All articles in this series:

  1. Cause of coronary heart disease
  2. High blood pressure as a cause of coronary heart disease
  3. Overweight as a cause of coronary heart disease
  4. Lack of exercise as a cause of coronary heart disease
  5. Other reasons
  6. Classification