Relation Between RR Intervals and Early Diastolic Mitral Annular Velocities in Atrial Fibrillation
| Autor: | Sang Wook Kim, Kyung Joon Kim, Eun Young Kim, Wang-Soo Lee, Young Hwan Choi, Tae-Ho Kim, Cheol Won Hyeon, Chee Jeong Kim, Jun Hwan Cho, Kwang Je Lee |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
medicine.medical_specialty
RR interval Ventricular function left Heart rate Pulsed Doppler echocardiography Electrocardiography Internal medicine Internal Medicine medicine Diastolic function cardiovascular diseases medicine.diagnostic_test business.industry Mitral annular velocity Pulsed Doppler Echocardiography Atrial fibrillation medicine.disease cardiovascular system Cardiology Early diastolic Original Article sense organs Cardiology and Cardiovascular Medicine business |
| Zdroj: | Korean Circulation Journal |
| ISSN: | 1738-5555 1738-5520 |
| Popis: | Background and Objectives Irregular RR intervals in atrial fibrillation (AF) make beat-to-beat changes in left ventricular (LV) systolic performance. Early diastolic mitral annular velocity (E') is one of the well-established parameters for evaluating LV diastolic function. The relation between RR intervals and E's is unknown. The aim of this study was to observe the influence of continuous changes in RR interval on the parameter for diastolic function in AF. Subjects and Methods Echocardiography was performed in 117 patients with AF. E' was adjusted for the effect of pre-preceding RR interval (RR-2) using the logarithmic equation between RR-2 and E'. The logarithmic equation between adjusted E' and preceding RR interval (RR-1) was calculated. Results The slope in the relation between RR-1 and E' varied from -2.5 to 2.6. The slope was lower (more likely negative) in patients with higher ratio of early diastolic mitral flow velocity (E) to E' (r=-0.21, p=0.023), ischemic heart disease (IHD, r=0.21, p=0.026), and higher systolic blood pressure (r=-0.19, p=0.046). When patients were divided into these 3 groups on the basis of slope, the lowest slope group (0.57, n=39). The slope with regards to the relationship between RR-2 and E' also varied from -3.4 to 3.1. Conclusion Changes in RR intervals had variable effects on E's according to clinical variables in AF. |
| Databáze: | OpenAIRE |
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