Studying the significance of cardiac contractility variability

Based on the relationship between the amplitude of the first heart sound (S1) and the cardiac contractility, we propose a concept of cardiac contractility variability (CCV) and a method of analysis. This study was carried out to examine the regularity of the amplitude variability of the first heart...

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Bibliographic Details
Published inIEEE engineering in medicine and biology magazine Vol. 19; no. 3; pp. 102 - 105
Main Authors Xiao, S, Cai, S, Liu, G
Format Journal Article
LanguageEnglish
Published United States IEEE 01.05.2000
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Adolescent
Adult
Aged
Aged, 80 and over
BASIC (programming language)
Biomedical engineering
Cardiology
Cardiovascular diseases
Cardiovascular Diseases - physiopathology
Computer operating systems
Diseases
Exercise - physiology
Exercise Test
Female
Heart - physiopathology
Heart rate
Heart Sounds - physiology
Human factors
Humans
Laptop computers
Male
Middle Aged
Multimedia systems
Myocardial Contraction - physiology
Noninvasive medical procedures
Protocols
Psychology
Relational database systems
Respiratory mechanics
Respiratory Mechanics - physiology
Statistical analysis
Stress, Psychological - physiopathology
Testing
Thyristors
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Summary:Based on the relationship between the amplitude of the first heart sound (S1) and the cardiac contractility, we propose a concept of cardiac contractility variability (CCV) and a method of analysis. This study was carried out to examine the regularity of the amplitude variability of the first heart sound and to evaluate the practical significance of the CCV. This article considers only three factors: respiration, exercise, and psychological activity. Other factors influencing cardiac contractility are left for further study.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0739-5175
1937-4186
DOI:10.1109/51.844388