Non-invasive treatment of advanced atherosclerotic stenosis in the rabbit carotid artery using low-level combined dual- frequency ultrasonication
Author(s):
Abstract:
Background
The present study aimed to investigate the effect of low-level combined dual- frequency of 1 MHz and 150 kHz ultrasonication on fibro-lipid plaque with neovascularization in the rabbit common carotid artery. Materials And Methods
In this experimental study, the common carotid arteries in 17 rabbits were injured perivascularly by liquid nitrogen, followed by a 1.5% cholesterol-rich diet for eight weeks. The animals were randomly divided into three groups including A: a cholesterol-rich diet (n=7) and evaluation at eighth week, B: control and discontinuation of cholesterol-rich diet (n=5) and evaluation at twelfth week and C: low-level combined dual- frequency ultrasonication and discontinuation of cholesterol-rich diet (n=7) and evaluation at twelfth week. Blood volume flow and blood mean velocity were measured by color Doppler ultrasonography. Moreover, mean wall thickness and percentage of luminal cross-sectional area of stenosis were measured by B-mode ultrasonographic and histological methods in the stenotic region of the common carotid artery.Results
Results showed a significant reduction in the mean value for blood peak systolic pressure, blood mean pressure, blood mean velocity, mean wall thickness and percentage of luminal cross-sectional area of stenosis and a significant increase in the mean value for blood peak diastolic pressure and blood volume flow in group C compared with the other groups (P<0.05). Conclusion
Enhanced inertial cavitation effect of low-level combined dual- frequency ultrasonication can cause the degradation of the microvessels and the fibro-lipid content, lipolysis and thrombolysis in the plaque and significantly dilate the luminal cross-sectional area of stenosis.Keywords:
Language:
Persian
Published:
Feyz, Volume:18 Issue: 4, 2014
Pages:
292 to 307
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