NDLI: Noninvasive assessment of left ventricular force-frequency relationships by measuring carotid arterial wave intensity during exercise stress

Content Provider	IEEE Xplore Digital Library
Author	Tanaka, M. Sugawara, M. Ogasawara, Y. Suminoe, I. Izumi, T. Hiramatsu, O. Kajiya, F.
Copyright Year	2013
Description	Author affiliation: Japanese Red Cross Soc. Himeji Hosp., Himeji, Japan (Suminoe, I.) \|\| Fac. of Health Care Sci., Himeji Dokkyo Univ., Himeji, Japan (Tanaka, M.; Sugawara, M.; Izumi, T.) \|\| Dept. of Med. Eng., Kawasaki Univ. of Med. Welfare, Kurasiki, Japan (Ogasawara, Y.; Hiramatsu, O.; Kajiya, F.)
Abstract	Background: Evaluation of the contractile state 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. Objectives: We assessed the feasibility of measuring carotid arterial wave intensity and determining force-frequency (contractility-heart rate) relationships (FFR's) during exercise totally noninvasively. Methods: We measured carotid arterial wave intensity with a combined color Doppler and echo tracking system in 15 healthy young male volunteers (age 20.8 ± 1.3 years) at rest and during exercise. FFR's were constructed by plotting the maximum value of wave intensity $(WD_{1})$ against heart rate (HR). Results: $WD_{1}$ 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 $(r^{2}$ 0.67 ~ 0.91, p <; 0.0001 respectively). The slope of the $WD_{1}-HR$ relation ranged from 0.31 to 1.52 $[m/s^{3}(beat/min)].$ Conclusions: A global LV FFR can be generated in healthy young volunteers with an entirely noninvasive combination of exercise and wave intensity. These data should show the potential usefulness of FFR in the context of cardiac rehabilitation.
Starting Page	687
Ending Page	690
File Size	778043
Page Count	4
File Format	PDF
ISBN	9781457702167
ISSN	1557170X
DOI	10.1109/EMBC.2013.6609593
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-07-03
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heart rate Indexes Doppler effect Electronic mail Blood flow Myocardium
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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