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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Published in | IEEE engineering in medicine and biology magazine Vol. 19; no. 3; pp. 102 - 105 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
IEEE
01.05.2000
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
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Abstract | 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. |
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AbstractList | A 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 cardiac contractility variability (CCV). Three factors were considered: respiration, exercise, and psychological activity. The results show that the amplitude of the first heart sound has a very sensitive response to respiration and exercise. 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 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. |
Author | Shaoxi Cai Guochuan Liu Shouzhong Xiao |
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BackLink | https://www.ncbi.nlm.nih.gov/pubmed/10834124$$D View this record in MEDLINE/PubMed |
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Cites_doi | 10.1159/000410758 10.1007/BF02441966 10.1002/clc.4960080702 10.1109/51.775497 10.1109/IEMBS.1995.575312 10.1213/00000539-198903000-00037 |
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References | luisada (ref6) 1985; 32 ref9 ref4 ref3 xiao (ref7) 1999; 18 xiao (ref8) 1998 ref2 luisada (ref5) 1986; 41 ref1 |
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Snippet | Based on the relationship between the amplitude of the first heart sound (S1) and the cardiac contractility, we propose a concept of cardiac contractility... A 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... |
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Title | Studying the significance of cardiac contractility variability |
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