Contents
Download PDF
pdf Download XML
55884 Views
21322 Downloads
Share this article
Research Article | Volume:2 Issue 1 (, 1996) | Pages 94 - 102
Turbulence intensity in aortic stenosis: frequency characteristics and effects of alterations in left ventricular function
 ,
 ,
1
Department of Medicine, University of Chicago Hospital, Illinois 60637.
Under a Creative Commons license
PMID : -7505703
Published
Jan. 6, 1993
Abstract

Turbulent blood flow can occur downstream from a stenosis. The purpose of this study was to quantitate turbulence intensity and its frequency characteristics in the ascending aorta in adult patients with and without valvular stenosis, and to use extrasystoles to analyze the effects of changes in left ventricular function on turbulence. Turbulence intensity was determined from the digitized, high frequency oscillations seen in high fidelity pressure recordings of 25 patients with valvular aortic stenosis. The intensity of turbulence was quantitated as the root-mean-square (mmHg) of pressure fluctuations and as the total spectral power (mmHg2/beat) of the frequency spectrum between 25 Hz and 400 Hz. Frequency characteristics were summarized by the mean and median frequency of spectral power and partitioning the spectrum into 25 Hz segments. Ten adult patients without aortic valve or outflow tract abnormalities served as controls. Adult patients with aortic stenosis had significantly more turbulence in the ascending aorta than controls (total spectral power 1577 +/- 450 mmHg2 vs. 198 +/- 22 mmHg2, p < 0.01). Furthermore, the frequency distribution in aortic stenosis was biased towards higher frequencies (mean frequency 35 +/- 14 Hz vs 54 +/- 2 Hz, p < 0.001). Turbulence intensity in aortic stenosis demonstrated beat to beat modulation by left ventricular function. The total spectral power of a sinus beat was 1888 +/- 762 mmHg2, and fell to 137 +/- 63 mmHg2 in a weak premature beat, and rose to 3618 +/- 1178 mmHg2 in a potentiated post- extrasystolic beat (p = 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)

 

 

How to cite: O'Toole, M. F., Carroll, J. D., & Feldman, T. (1993). Turbulence intensity in aortic stenosis: frequency characteristics and effects of alterations in left ventricular function. The Journal of heart valve disease2(1), 94–102.

Keywords
Recommended Articles
Research Article
A Study of Clinical and Biochemical Profile in Hepatitis C and its Correlation with HCV RNA Titre for Disease Severity
...
Published: 30/07/2025
Download PDF
Read Article
Research Article
Comparative Evaluation of Ropivacaine–Dexmedetomidine and Bupivacaine–Dexmedetomidine in Supraclavicular Brachial Plexus Block for Upper Limb Surgeries
Published: 30/04/2020
Download PDF
Read Article
Research Article
Study of autonomic function test in obese individual
...
Published: 26/09/2025
Download PDF
Read Article
Research Article
Effects of obesity on Cardiorespiratory parameters in young adults
...
Published: 26/09/2025
Download PDF
Read Article
© Copyright Journal of Heart Valve Disease