Noninvasive evaluation of left ventricular force−frequency relationships by measuring carotid arterial wave intensity during exercise stress

Background and purpose Estimation of the contractility of the left ventricle during exercise is important in drawing up a protocol of cardiac rehabilitation. It has been demonstrated that color Doppler- and echo tracking-derived carotid arterial wave intensity is a sensitive index of global left ven...

Full description

Saved in:
Bibliographic Details
Published in:Journal of medical ultrasonics (2001) 2015-01, Vol.42 (1), p.65-70
Main Authors: Tanaka, Midori, Sugawara, Motoaki, Ogasawara, Yasuo, Suminoe, Isao, Izumi, Tadafumi, Niki, Kiyomi, Kajiya, Fumihiko
Format: Article
Language:English
Subjects:
Analysis
Carotid arteries
Carotid Arteries - diagnostic imaging
Catheters
Color
Exercise Test
Feasibility Studies
Flow velocity
Goodness of fit
Heart beat
Heart rate
Heart Ventricles - diagnostic imaging
Humans
Imaging
Male
Measurement
Medicine
Medicine & Public Health
Original
Original Article
Radiology
Regression analysis
Rehabilitation
Tracking systems
Ultrasonography, Doppler, Color
Ultrasound
Veins & arteries
Ventricular Function, Left
Workloads
Young Adult
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Background and purpose Estimation of the contractility of the left ventricle during exercise is important in drawing up a protocol of cardiac rehabilitation. It has been demonstrated that color Doppler- and echo tracking-derived carotid arterial wave intensity is a sensitive index of global left ventricular (LV) contractility. We assessed the feasibility of measuring carotid arterial wave intensity and determining force−frequency (contractility−heart rate) relations (FFRs) during exercise totally noninvasively. Methods We measured carotid arterial wave intensity with a combined color Doppler and echo tracking system in 25 healthy young male volunteers (age 20.8 ± 1.2 years) at rest and during exercise. FFRs were constructed by plotting the maximum value of wave intensity (WD 1 ) against heart rate (HR). Results We first confirmed that HR increased linearly with an increase in work load in each subject ( r 2  = 0.95 ± 0.04). WD 1 increased linearly with an increase in HR. The goodness-of-fit of the regression line of WD 1 on HR in each subject was very high ( r 2  = 0.48−0.94, p  
ISSN:1346-4523
1613-2254
DOI:10.1007/s10396-014-0554-8