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• W2634498056 abstract "ObjectivesWe first aimed to identify the histopathological changes occurring immediately after renal denervation (RDN) with radiofrequency energy, and then to assess the feasibility of determining procedural success using currently available clinical intravascular imaging techniques.BackgroundCatheter-based RDN has been used as an alternative therapy for hypertension. However, no practical endpoint to determine procedural success during treatment has been established.MethodsA total of 39 ablation lesions were induced in vivo in eight porcine renal arteries and a total of 15 ablation lesions were induced ex vivo in five excised porcine renal arteries with a radiofrequency delivery device. Acute histological changes and appearance on intravascular imaging of the lesions were investigated with light microscopy, transmission electron microscopy, intravascular ultrasound (IVUS), and optical frequency domain imaging (OFDI).ResultsMarked changes were noted in media, adventitia, and perirenal-arterial nerves immediately after in vivo ablation. Changes visualized on IVUS were characterized by focal adventitial thickening comprising a relatively echogenic layer around a heterogeneously hypoechoic interior region, and on OFDI as disappearance of the external elastic membrane signals with high scattering of signals in the surface layer. The changes after ex vivo ablation were histopathologically identical to those from in vivo ablation. There were statistically significant positive correlations in measured dimensions (area, depth, width, and diameter) of ablation lesions between histopathology and IVUS/OFDI findings (Pearson correlation coefficients = 0.69–0.77).ConclusionsThese findings suggest that observation of treated renal arteries by IVUS or OFDI immediately after RDN improves the success rate of RDN." @default.
• W2634498056 created "2017-06-30" @default.
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• W2634498056 date "2017-06-22" @default.
• W2634498056 modified "2023-10-13" @default.
• W2634498056 title "Acute changes in histopathology and intravascular imaging after catheter-based renal denervation in a porcine model" @default.
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• W2634498056 doi "https://doi.org/10.1002/ccd.27158" @default.
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