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Coarctation of aorta

Features Suggestive of Hemodynamic Significance in Coarctation of the Aorta

  • Upper-to-lower extremity systolic blood pressure > 20 mmHg

  • TTE

    • Doppler mean gradient > 20 mmHg

    • Corrected COA maximum instantaneous gradient > 20 mmHg

    • Diastolic tail in the descending aorta and diastolic forward flow in the abdominal aorta

  • Cardiac catheterization

    • COA peak-to-peak gradient > 20 mmHg

  • MRA/CTA

    • Aortic isthmus ratio < 0.5 -0.7

  • Angiogram

    • Collateral arteries

References

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1) Writing Committee Members∗, Gurvitz M, Krieger EV, Fuller S, Davis LL, Kittleson MM, et al. 2025 ACC/AHA/HRS/ISACHD/SCAI Guideline for the Management of Adults With Congenital Heart Disease: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2026 Feb 24;153(8):e115–251. doi:10.1161/CIR.0000000000001402

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