Related Experiment Video
Updated: May 12, 2026
Ultrasound Assessment of Flow-Mediated Dilation of the Brachial and Superficial Femoral Arteries in Rats
Published on: November 3, 2016
Focal Renal Arterial Fibromuscular Dysplasia Demonstrated via Intravascular Ultrasound Image
Osamu Ogawa1, Ritsuo Watanabe, Hiroshi Shimizu
1Division of Cardiology, Niigata Prefectural Central Hospital, Joetsu, Niigata, Japan.
Abstract:
A young male suffering from renovascular hypertension was admitted. His initial arteriogram highlighted a focal stenosis of the right renal artery. His intravascular ultrasound (IVUS) revealed increasing medial layer thickness accompanied by a mixture of both high and low echoic materials in this layer. There was also mild thickening of the intimal layer. The diagnosis of medial fibroplasia and intimal fibromuscular dysplasia (FMD) was made. Balloon angioplasty decreased the volume of dysplastic tissue. The IVUS images facilitated both the initial diagnosis of focal renal arterial stenosis and the evaluation of the mechanism of dilatation by angioplasty.
Insights
This study details a case of renovascular hypertension diagnosed using intravascular ultrasound (IVUS). IVUS imaging proved crucial for diagnosing fibromuscular dysplasia and guiding successful balloon angioplasty treatment.
Area of Science:
- Cardiovascular Medicine
- Medical Imaging
- Interventional Cardiology
Background:
- Renovascular hypertension can stem from renal artery stenosis.
- Fibromuscular dysplasia (FMD) is a key cause of renal artery stenosis, particularly in younger individuals.
- Accurate diagnosis and characterization of renal artery lesions are vital for effective treatment.
Observation:
- Intravascular ultrasound (IVUS) revealed medial layer thickening with mixed echogenicity and intimal thickening in a patient with renovascular hypertension.
- These findings were consistent with medial fibroplasia and intimal fibromuscular dysplasia (FMD).
- The focal stenosis was located in the right renal artery.
Findings:
- IVUS provided detailed insights into the underlying pathology of renal artery stenosis, differentiating it from other causes.
- Balloon angioplasty was effective in reducing the dysplastic tissue volume.
- The procedure demonstrated the utility of IVUS in both diagnosis and procedural guidance.
Implications:
- IVUS is a valuable tool for diagnosing and characterizing renal artery stenosis caused by FMD.
- This case highlights the successful application of IVUS-guided balloon angioplasty for treating FMD.
- Improved diagnostic capabilities with IVUS can lead to better patient outcomes in renovascular hypertension.
