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Published on: November 11, 2012
[Vascular murmurs in arteriosclerotic stenosis of the internal carotid artery]
Insights
Phonoangiography can detect internal carotid artery (ICA) stenosis by analyzing vascular murmur characteristics. The intensity and frequency of murmurs correlate with the degree of ICA stenosis, aiding diagnosis.
Area of Science:
- Vascular Surgery
- Diagnostic Imaging
- Cardiovascular Medicine
Context:
- Atherosclerotic lesions in the internal carotid arteries (ICA) pose a significant risk for stroke.
- Accurate non-invasive assessment of ICA stenosis is crucial for patient management.
- Phonoangiography offers a potential method for evaluating carotid artery disease.
Purpose:
- To investigate the relationship between phonoangiographic findings and the degree of internal carotid artery (ICA) stenosis.
- To determine if vascular murmur characteristics can predict the severity of atherosclerotic lesions in the ICA.
Summary:
- 152 patients with varying degrees of ICA atherosclerotic lesions underwent phonoangiography.
- A strong correlation was observed between vascular murmur characteristics (intensity, frequency) and the degree of ICA stenosis.
- Murmur signals were absent in lesions without lumen impairment but present and indicative of stenosis severity (20% to >50% lumen reduction) and occlusion.
Impact:
- Phonoangiography can serve as a valuable non-invasive tool for assessing internal carotid artery (ICA) stenosis.
- This technique may help in identifying patients with significant carotid artery disease requiring further intervention.
- Findings support the use of vascular murmur analysis in the non-invasive diagnosis of cerebrovascular disease.
Abstract:
As many as 152 patients with atherosclerotic lesions of the internal carotid arteries (ICA) of varying degree verified on angiography were examined by phonoangiography. A well-defined relationship was noted between the presence, intensity and frequency characteristics of vascular murmur on the one hand and the intensity of stenoses in both ICA on the other one. Murmur signals were not found in atherosclerotic lesions of the walls of the ICA without impairment of the vascular lumen in the area of the carotid arteries on the neck and in the area of the orbits. Weak carotid murmur occurred with a 20% decrease of the area of the total lumen of both ICA. Strong carotid murmur with high-frequency signals occurred in summary stenosis amounting to over 50% of the lumen of both ICA on the side of more gross stenosis or on the side of the ICA stenosis in occlusion of the opposite vessel. In patients with fairly gross stenosis or occlusion of one ICA and stenosis of the intracranial part of the other ICA, phonography of the orbital area on the side of stenosis recorded high-frequency signals on the spectrogram, in the range from 300 to 1000 Hz.
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