Characteristics of innocent and stenotic cervical bruits

Townes, H. W.; Bowers, Joel Morris; Braun, H

doi:10.1016/0002-8703(70)90360-1

Cited by 3 publications

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“…Previous work has demonstrated that the quality and duration of bruits emanating from any arterial source depend upon the degree of stenosis of the underlying vessel. [1][2][3][4] In general, as the narrowing increases, any given bruit not only lengthens but also possesses a greater proportion of higher frequency components. 1 We have also demonstrated that similar principles apply in assessment of severity of valvar aortic stenosis.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] In general, as the narrowing increases, any given bruit not only lengthens but also possesses a greater proportion of higher frequency components. 1 We have also demonstrated that similar principles apply in assessment of severity of valvar aortic stenosis. 5 Because of the ready availability of inexpensive modern digital recording techniques and computer technology, we have elected to reassess these observations in a clinical setting in order to detect the potential utility of analyzing such bruits.…”

Section: Introductionmentioning

confidence: 99%

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The cervical bruit: Sound spectral analysis related to severity of carotid arterial disease

Tavel

Bates

2006

Clinical Cardiology

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Summary:Cervical bruits may signal the presence of highgrade narrowing of arterial supply to the brain. Previous small studies have suggested that severe arterial stenosis may produce bruits that persist longer and contain a greater proportion of higher-frequency sound spectral components. This study included 96 patients referred for duplex/Doppler testing after cervical bruits had been detected. With the use of a stethoscope equipped with wireless communication to an ordinary handheld computer, we recorded these bruits, analyzed peak sound frequencies and the durations of sound persistence ≥ 200 Hz, and correlated them with Doppler velocities. Overall, the durations and peak frequencies within the bruits correlated significantly with the peak Doppler derived velocities, that is, severity of arterial obstruction. In the presence of high-grade arterial stenosis (peak Doppler velocity ≥ 200 cm/s), bruits regularly possessed either high peak frequencies or prolonged signal durations with a sensitivity approaching 90%. Bruits containing lower and nonsustained peak frequencies were uncommonly associated with severe arterial obstruction. Only well-transmitted bruits with frequencies reaching 200 Hz could be analyzed satisfactorily. In conclusion, we confirm earlier observations that peak frequencies and duration of arterial bruits correlate significantly with severity of underlying arterial obstruction. Equipment used is inexpensive, convenient, and portable. This method provides an objective means for confirming and quantifying subjective auditory impressions of bruits gained at the bedside. It can provide assistance in selecting patients for further testing and as a means for serial followup of individuals with known disease.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The cervical bruit: Sound spectral analysis related to severity of carotid arterial disease

Tavel

Bates

2006

Clinical Cardiology

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Auscultation and Atherosclerosis

Pickett

Villines

Taylor

2012

Atherosclerosis: Clinical Perspectives Through Imaging

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New bioacoustic signal processing techniques

Taylor

Mohan

Olinger

1977

1977 IEEE Conference on Decision and Control Including the 16th Symposium on Adaptive Processes and a Special Symposium on Fuzz

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The engineering principles and techniques applicable to the study and eventual noninvasive detection of aneursyms are being studied at the University of Cincinnati. Reported statistics indicate the ruptures of a subarachnoid aneurysm is the cause of 2% of all sudden deaths, is 68% mortal and leaves 21% mentally deficient otherwise. Surgical survival after hemorrhage is rated at 77% and 90% if detected. Statistics indicate that a patient's chances for a productive life are good if the aneursym can be detected and surgically treated. Approximately 1200 of all polycystic and 15% of a1 migrane patients have aneurysms. These statistics are not high enough to warrant the risk of angiography for pre-bleed analysis however. Angiography, which entails patient risk and hospitalization, is the only presently available test for the above conditions.

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Characteristics of innocent and stenotic cervical bruits

Cited by 3 publications

References 1 publication

The cervical bruit: Sound spectral analysis related to severity of carotid arterial disease

The cervical bruit: Sound spectral analysis related to severity of carotid arterial disease

Auscultation and Atherosclerosis

New bioacoustic signal processing techniques

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