Relationship Between RR Intervals and Early Diastolic Mitral Annulus Velocities in Atrial Fibrillation Patients Who do not Have Significant Valvular Diseases.
10.4070/kcj.2008.38.10.551
- Author:
Yeo Won CHOI
1
;
Jeong Eun KIM
;
Eun Jung CHO
;
Eun Young KIM
;
Ki Woo SEO
;
Kyung Heon LEE
;
Kwang Je LEE
;
Sang Wook KIM
;
Tae Ho KIM
;
Hong Sook KO
;
Chee Jeong KIM
;
Wang Seong RYU
Author Information
1. Division of Cardiology, Department of Internal Medicine, College of Medicine, Chung-Ang University, Seoul, Korea. cjkim@cau.ac.kr
- Publication Type:Original Article
- Keywords:
Left ventricular functions;
Atrial fibrillation;
Electrocardiography;
Pulsed Doppler echocardiography
- MeSH:
Atrial Fibrillation;
Echocardiography, Doppler, Pulsed;
Electrocardiography;
Heart Valve Diseases;
Heart Ventricles;
Humans;
Logistic Models;
Ventricular Function, Left
- From:Korean Circulation Journal
2008;38(10):551-556
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND AND OBJECTIVES: Irregular RR intervals in atrial fibrillation (AF) results in beat to beat changes in hemodynamical parameters. Early diastolic mitral annulus velocity (E') is one of the parameters that represent diastolic function of the left ventricle (LV). In this study, we have investigated the effects of continuous changes of systolic functions in AF on the diastolic functions of the LV. SUBJECTS AND METHODS: E' (35-40 beats) was recorded in 31 AF patients that did not have significant valvular heart diseases. The relationships between preceding RR intervals (RR-1) or pre-preceding RR intervals (RR-2) and E's were obtained using a logarithmic function. RESULTS: Slopes between RR-1 and E' varied from -1.62 to 1.04 in total coordinates. In the logistic regression analysis patients with negative slopes were found to have a larger left atrial size than patients with positive slopes (5.5+/-0.67 cm vs. 4.9+/-0.56 cm, p=0.02). Slopes were negatively related with mean RR intervals in the Pearson correlation analysis (r=-0.40, p=0.028). Slopes between RR-2 and E' were also variable and were not associated with other parameters. CONCLUSION: Beat to beat changes in systolic functions derived from irregular RR intervals in AF had variable effects on diastolic functions among patients. The relationship between RR-1 and E' was associated with LA sizes and mean RR intervals.
