Preliminary study on effect of cardiac cycle and respiratory motion on Doppler flow spectrum of common femoral venous in healthy adults
- VernacularTitle:呼吸和心动周期对正常人股总静脉血流频谱影响的初步研究
- Author:
Kang DING
;
Tiesheng CAO
;
Yunyou DUAN
- Publication Type:Journal Article
- Keywords:
Ultrasonography,Doppler;
Femoral vein;
Hemodynamics;
Respiration;
Myocardial contraction
- From:
Chinese Journal of Ultrasonography
2003;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the nature of Doppler flow spectrum of normal lower limb venous and to assess the influence of respiratory and cardiac cycle on it. Methods The right common femoral veins of 32 healthy adults were evaluated by pulsed wave Doppler with simultaneous electrocardiogram and respiratory tracing. Results In normal respiration,the Doppler spectrum of common femoral vein was divided into three types. Type C(“C” is for cardiac) displayed a wave rhythm which shared similarity with the heart beat and consists of atrial systolic (a),systolic (s) and diastolic (d) wave. Cardiac waveforms were modulated by respiratory motion: during expiration,the velocity of s,d wave gradually increased and during inspiration gradually decreased,and a wave was on the opposite. Type R(“R” is for respiration) displayed a waveform which is in harmony with respiratory signal basically. Type CR displayed a waveform which is an integration of type C and type R. Conclusions During quiet respiration,lower limb venous Doppler flow spectrum is influenced both by respiratory and cardiac cycle. The appreciation of this phenomenon would be instructive on analyzing the Doppler spectrum of lower limb venous in normal and pathological condition.
