Effects of Respiration on Right and Left Ventricular Diastolic Function in Normal Children.
- Author:
Hae Soon KIM
1
;
Young Mi HONG
Author Information
1. Department of Pediatrics, College of Medicine, Ewha Womans University, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Respiration;
Ventricle;
Diastolic function
- MeSH:
Child*;
Diastole;
Echocardiography;
Echocardiography, Doppler;
Electrocardiography;
Heart Rate;
Heart Ventricles;
Humans;
Mitral Valve;
Relaxation;
Respiration*
- From:Journal of the Korean Pediatric Society
1999;42(10):1412-1418
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To evaluate the effects of respiration on diastolic filling pattern in normal children by Doppler echocardiography. MATERIALS AND METHODS: Doppler echocardiograms of the tricuspid and mitral valves were recorded with electrocardiogram and respirations in 46 normal children aged 3months to 14years(7.6+/-3.5year). We measured the following variables: heart rate, the peak E and A velocities, the area under the E and A portions of the diastolic velocity-time integral(VTI) isovolumetric relaxation time(IVRT). From these measurements, we calculated the following: the peak E/A ratio, the VTIe/VTIa, VTIe/VTIt, VTIa/VTIt. RESULTS: There was a significant decrease with inspiration only in peak E velocity of left ventricle(LV) filling. There was a significant increase in peak E velocity, peak A velocity, peak E/A, VTIe, VTIe/VTIa, VTIe/VTIt and VTIa/VTIt of right ventricle(RV) filling with inspiration. The LV peak E velocity, peak A velocities and VTIe were significantly higher than those of the right ventricle during inspiration. All variables of diastole except VTIa and VTIa/VTIt were higher for the left than for the right ventricle during expiration. VTIa/VTIt was higher for right ventricle. CONCLUSION: Assessment of pediatric RV and LV diastolic flow by echocardiography should include standardization for phase of respiration.
