How is coronary artery stenosis graded?

Apr 24, 2023 Source: Cainiu Health

Dr. Tian Hongbo

Introduction

Coronary artery stenosis is classified according to the degree of narrowing. Grade 1 represents mild coronary artery stenosis, which is a minor lesion. Grade 2 is also considered mild stenosis but carries a higher risk of adverse events. Grade 3 indicates moderate coronary artery stenosis. Grade 4 refers to severe coronary artery stenosis; patients may develop symptoms of heart failure, and the coronary artery disease is relatively serious.

Coronary artery stenosis is classified into four grades based on the degree of narrowing, as detailed below:

1. Grade 1

If the coronary artery narrowing is less than 25%, it is considered mild coronary artery stenosis, representing a minor lesion that may cause only mild symptoms.

2. Grade 2

If the coronary artery narrowing is greater than 25% but does not exceed 50%, it is considered relatively mild coronary artery stenosis, although adverse events may still occur more easily.

3. Grade 3

If the coronary artery narrowing is greater than 50% but does not exceed 70%, it is classified as moderate coronary artery stenosis.

4. Grade 4

If the coronary artery narrowing exceeds 70%, it is considered severe coronary artery stenosis. Patients may experience symptoms of heart failure, indicating significant coronary artery disease.

For patients with grade 1 or grade 2 coronary artery stenosis, lipid-lowering medications may be chosen for treatment, and medication use should follow medical advice.

For patients with grade 3 or grade 4 coronary artery stenosis, the condition is more serious and may require medication or coronary stent implantation. In certain cases, coronary artery bypass surgery may be necessary.

If any discomfort occurs during treatment, seek medical advice promptly.

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