Serial assessment of arterial structure and function in patients with coarctation of the aorta undergoing stenting

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Vascular Biology

Background:

• Stenting is a common treatment for coarctation of the aorta (CoA), but its long-term effects on arterial health are not well understood.
• Pre-existing arterial abnormalities and impaired vascular function are characteristic of CoA patients.

Purpose of the Study:

• To evaluate arterial structure and function, including peripheral reactivity, stiffness, and intima-media thickness (IMT), before and after aortic coarctation stenting.
• To assess changes in left ventricular (LV) mass and function following successful stenting.

Main Methods:

• Echocardiography and vascular ultrasound were used to measure LV mass, ejection fraction, flow-mediated dilation (FMD), nitrate-mediated dilation (NMD), pulse wave velocity (PWV), and IMT.
• Twenty-one CoA patients were studied at baseline, 1 day, 6 months, and 1 year post-stenting, compared to 21 healthy controls.

Main Results:

• CoA patients exhibited higher LV mass, impaired FMD and NMD, increased PWV, and thickened carotid and subclavian arteries compared to controls.
• Stenting successfully reduced the pressure gradient and improved LV function and mass, but arterial stiffness, reactivity, and IMT did not significantly change one year post-procedure.
• Abnormal arterial structure and function persisted in CoA patients one year after successful stenting.

Conclusions:

• While stenting effectively treats aortic coarctation, it does not fully restore normal arterial structure or function.
• Impaired arterial reactivity and increased arterial stiffness remain significant issues in CoA patients post-stenting.
• Long-term vascular health monitoring is crucial for patients treated for coarctation of the aorta.