0
ARTICLE |

Hemodynamic Studies of the Audiofrequency Analysis of Carotid Bruits

David J. Bouchier-Hayes, MCh, FRCS; Randolph D. Maloney, MD; Nancy C. Reidy, RN; William M. Abbott, MD
Arch Surg. 1978;113(8):920-923. doi:10.1001/archsurg.1978.01370200014003.
Text Size: A A A
Published online

• The contribution of carotid audiofrequency analysis to the noninvasive diagnosis of carotid arterial lesions requires clarification. Carotid arterial stenoses were simulated in the dog and the following measurements were made: proximal and distal arterial pressure, blood flow, percent area reduction, and carotid audiofrequency analysis. A 40% area reduction produced a systolic bruit but no interference with flow or pressure. A 60% area reduction produced a pansystolic bruit and a reduction in peak systolic flow (precritical stenosis). A 70% area reduction produced a systolic bruit that extended into diastole, a reduction in mean blood flow, and an increased pressure gradient (critical stenosis). At total occlusion, there was no recordable heart sound or bruit. Carotid audiofrequency analysis can establish the hemodynamic importance of a carotid artery lesion and it is an essential component of any noninvasive examination.

(Arch Surg 113:920-923, 1978)

Topics

Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

Figures

Tables

References

Correspondence

CME
Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).
Submit a Comment

Multimedia

Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.

Jobs
brightcove.createExperiences();