Relationships between mean velocity of circumferential fiber shortening (VCF) and heartrate ‐ the diagnostic value of a normalization of VCF to heart rate
作者:
Wolfram H. Knapp,
期刊:
Journal of Clinical Ultrasound
(WILEY Available online 1978)
卷期:
Volume 6,
issue 1
页码: 10-15
ISSN:0091-2751
年代: 1978
DOI:10.1002/jcu.1870060105
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: Echocardiography;Myocardial function
数据来源: WILEY
摘要:
AbstractPrevious studies relating mean velocity of circumferential fiber shortening (VCF) to heart rate suggested a linear correlation. Since there is considerable variability in the heart rate of normal subjects and in patients with myocardial disease, a normalization of VCF to heart rate could possibly increase the reliability of this echocardiographic parameter of myocardial function. In 106 normal subjects, a linear correlation between VCF and heart rate was confirmed (r=0.87). Values normalized to an arbitrary heart rate of 60/min by the calculated regression were called “relative velocity of contraction” (RVC). Because of the independence of RVC from heart rate, the RVC shows an obviously smaller physiological variation than VCF. Two hundred seventy‐six patients were grouped and classified according to hemodynamic and angiographic parameters. These parameters correlated closer to RVC than to VCF. In addition, RVC gave definitely superior diagnostic information in separating patients with cardiac abnormality from normal individuals than di
点击下载:
PDF
(631KB)
返 回