| Quantitative Assessment of Myocardial Tissue Velocity in Normal Children with Doppler Tissue Imaging : Reference Values, Growth and Heart Rate Related Change |
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Se Young Kim1, Myung Chul Hyun2, Sang Bum Lee2 |
1Department of Pediatrics, College of Medicine, Daegu Catholic University, Korea
2Department of Pediatrics, College of Medicine, Kyungpook National University, Daegu, Korea |
| 소아에서 도플러 조직영상을 이용한 최대 심근 속도의 계측 : 정상 추정치 및 성장 및 심박동수에 따른 변화 |
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김세영1, 현명철2, 이상범2 |
1대구가톨릭대학교 의과대학 소아과학교실
2경북대학교 의과대학 소아과학교실 |
Correspondence:
Se Young Kim, Email: ksy8879@cu.ac.kr
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| Abstract |
Purpose
: To measure the peak myocardial tissue velocities and patterns of longitudinal motion of atrioventricular(AV) annuli and assess body weight and heart rates-related changes in normal children.
Methods
: Using pulsed wave Tissue Doppler Imaging(TDI), we measurpeak systolic, early and late diastolic myocardial velocities in 72 normal children at six different sites in apical-4 chamber (A4C) view and at four different sites in apical-2 chamber(A2C) view and compared those values with each other, also observing effects with body weights and heart rates. Longitudinal motions of the AV annuli were measured at three different sites in A4C.
Results
: There were no significant differences of the TDI parameters between gender, ECHO- machines and among the three Doctors performing TDI. Peak myocardial velocities were significantly higher at the base of the heart than in the mid-ventricular region and in the right lateral ventricular wall than in the left lateral ventricular wall or IVS. The TDI parameters showed no significant correlation with fractional shortening(%). Peak systolic and early diastolic myocardial velocities had no correlation with heart rates, but peak late diastolic velocities and A/E ratio correlated positively with heart rates. Correlations between the TDI parameters and body weight were inconsistent. Absolute longitudinal displacement and % displacement were not differ between gender and not correlated with the TDI parameters.
Conclusion
: We measured the peak myocardial velocities with TDI and the longitudinal motion of the AV annuli using M-mode echocardiography in normal children. With more large scale evaluation, we may establish reference values in normal children and broaden clinical applicabilities in congenital and acquired heart diseases. |
| Key Words:
Tissue Doppler Imaging , Myocardial velocity , Pediatrics , Reference value |
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