Abstract
Objective. To study the hemodynamics in left ventricle (LV) cavity of the left ventricle by Doppler method. Design and methods. 50 children (20 female, 30 male) including 15 athletes (aged from 5 days to 18 years old) were examined. Ultrasonic scanner «SonoACE-9900» was used. Results. The wave with biphasic amplitude on peak E of transmural blood stream (named «Sh»-wave) was registered when the «control volume» was placed in LV cavity, and its velocity characteristics and duration of positive and negative phases were determined. Children with average heart rate 95,4 ± 5,2 b/min. «Sh»-wave duration was 39,4 ± 10,6 msec, and velocity characteristics of positive and negative phases were 75,4 ± 9,4 and 41,3 ± 6,5 cm/sec. respectively. Athletes with sinusal bradycardia (average heart rate 58,7 ± 2,3 b/min.) had longer «Sh»- waves (66,1 ± 15,2 msec), higher velocity characteristics of positive phase (78,8 ± 11,3 cm/sec.) and lower velocity of negative phase (32,6 ± 5,3 cm/sec.). Conclusion. The spherical turbulent blood stream in the LV can be formed during diastolic filling. It presents as an echo-signal of biphase amplitude in the middle third of LV.
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