Cargando…
New Parameters for Left Ventricular Function in Atrial Fibrillation: Based on the Relationship between RR Interval and Performance
This study was designed to obtain new parameters representing left ventricular (LV) function independent of irregular RR intervals in atrial fibrillation (AF). AF patients were divided into Normal (n=9) and LV Dysfunction (n=9) groups. The relations between LV outflow peak ejection velocity (Vpe) an...
Autores principales: | , , |
---|---|
Formato: | Texto |
Lenguaje: | English |
Publicado: |
The Korean Academy of Medical Sciences
2005
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2808569/ https://www.ncbi.nlm.nih.gov/pubmed/15716596 http://dx.doi.org/10.3346/jkms.2005.20.1.20 |
_version_ | 1782176504768102400 |
---|---|
author | Ko, Hong Sook Kim, Chee Jeong Ryu, Wang Seong |
author_facet | Ko, Hong Sook Kim, Chee Jeong Ryu, Wang Seong |
author_sort | Ko, Hong Sook |
collection | PubMed |
description | This study was designed to obtain new parameters representing left ventricular (LV) function independent of irregular RR intervals in atrial fibrillation (AF). AF patients were divided into Normal (n=9) and LV Dysfunction (n=9) groups. The relations between LV outflow peak ejection velocity (Vpe) and preceding (RR-1) or pre-preceding RR intervals (RR-2) were obtained using logarithmic equations, from which the squared correlation coefficient (r(2)), slope, Vpe at RR-1 or RR-2=1 sec (Vpe-1), and the ratio of slope to Vpe-1 (Slope/Vpe-1) were calculated. Among the parameters between RR-1 and Vpe, Slope/Vpe-1 was higher in LV Dysfunction group than in Normal group (p=0.05). When only coordinates with RR-1 from 0.6 to 1 sec were included, Slope/Vpe-1 (p=0.001) was higher in LV Dysfunction group than in Normal group. Among the parameters between RR-2 and Vpe, Slope/Vpe-1, slope, and r(2) were different between the two groups. In multivariate analysis, Slope/Vpe-1 between RR-2 and Vpe was only independent parameter. However, Slope/Vpe-1 between RR-1 and Vpe in the coordinates with RR-1 from 0.6 to 1 sec had the highest discriminating power. New parameters derived from the relations between RR intervals and LV performance might be useful to evaluate LV function quantitatively in AF. |
format | Text |
id | pubmed-2808569 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2005 |
publisher | The Korean Academy of Medical Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-28085692010-01-20 New Parameters for Left Ventricular Function in Atrial Fibrillation: Based on the Relationship between RR Interval and Performance Ko, Hong Sook Kim, Chee Jeong Ryu, Wang Seong J Korean Med Sci Original Article This study was designed to obtain new parameters representing left ventricular (LV) function independent of irregular RR intervals in atrial fibrillation (AF). AF patients were divided into Normal (n=9) and LV Dysfunction (n=9) groups. The relations between LV outflow peak ejection velocity (Vpe) and preceding (RR-1) or pre-preceding RR intervals (RR-2) were obtained using logarithmic equations, from which the squared correlation coefficient (r(2)), slope, Vpe at RR-1 or RR-2=1 sec (Vpe-1), and the ratio of slope to Vpe-1 (Slope/Vpe-1) were calculated. Among the parameters between RR-1 and Vpe, Slope/Vpe-1 was higher in LV Dysfunction group than in Normal group (p=0.05). When only coordinates with RR-1 from 0.6 to 1 sec were included, Slope/Vpe-1 (p=0.001) was higher in LV Dysfunction group than in Normal group. Among the parameters between RR-2 and Vpe, Slope/Vpe-1, slope, and r(2) were different between the two groups. In multivariate analysis, Slope/Vpe-1 between RR-2 and Vpe was only independent parameter. However, Slope/Vpe-1 between RR-1 and Vpe in the coordinates with RR-1 from 0.6 to 1 sec had the highest discriminating power. New parameters derived from the relations between RR intervals and LV performance might be useful to evaluate LV function quantitatively in AF. The Korean Academy of Medical Sciences 2005-02 2005-02-28 /pmc/articles/PMC2808569/ /pubmed/15716596 http://dx.doi.org/10.3346/jkms.2005.20.1.20 Text en Copyright © 2005 The Korean Academy of Medical Sciences http://creativecommons.org/licenses/by-nc/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Ko, Hong Sook Kim, Chee Jeong Ryu, Wang Seong New Parameters for Left Ventricular Function in Atrial Fibrillation: Based on the Relationship between RR Interval and Performance |
title | New Parameters for Left Ventricular Function in Atrial Fibrillation: Based on the Relationship between RR Interval and Performance |
title_full | New Parameters for Left Ventricular Function in Atrial Fibrillation: Based on the Relationship between RR Interval and Performance |
title_fullStr | New Parameters for Left Ventricular Function in Atrial Fibrillation: Based on the Relationship between RR Interval and Performance |
title_full_unstemmed | New Parameters for Left Ventricular Function in Atrial Fibrillation: Based on the Relationship between RR Interval and Performance |
title_short | New Parameters for Left Ventricular Function in Atrial Fibrillation: Based on the Relationship between RR Interval and Performance |
title_sort | new parameters for left ventricular function in atrial fibrillation: based on the relationship between rr interval and performance |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2808569/ https://www.ncbi.nlm.nih.gov/pubmed/15716596 http://dx.doi.org/10.3346/jkms.2005.20.1.20 |
work_keys_str_mv | AT kohongsook newparametersforleftventricularfunctioninatrialfibrillationbasedontherelationshipbetweenrrintervalandperformance AT kimcheejeong newparametersforleftventricularfunctioninatrialfibrillationbasedontherelationshipbetweenrrintervalandperformance AT ryuwangseong newparametersforleftventricularfunctioninatrialfibrillationbasedontherelationshipbetweenrrintervalandperformance |