Comparative study of two different echocardiography views used to observe the coronary sinus's hemodynamics

HAO Caili; HE Junbin

Abstract：Objective To explore application of the transthoracic echocardiography to obtain different views of coronary sinus(CS)in healthy adultsand to observe the structure and blood flow dynamics of coronary sinus.Methods 42 healthy adults were randomly selected and examined by transthoracic echocardiography.The long axis view,short axis views and opening views of coro-nary sinus were displayed in all subjects.The CS display rates of all views were obtained.CS visible running length was measured by two-dimensional echocardiography.The inner diameter and its change in different phases during a cardiac cycle were recorded by M-mode echocardiography.The blood flow dynamics obtained from opening views by pulse wave Doppler.Results Nonstan-dard apical four chamber view was the best view to display long axis of CS.The display rate of CS in this view was 100％.It could be used to measure the CS visible running length and to record the inner diameter and its change in different phases by M-mode echo-cardiography.The display rates of opening views in parasternal right ventricular inflow tract and in its mirror section were 88％,95.2％,respectively.The mirror section of parasternal right ventricular inflow tract was better than the parasternal right ventricular inflow tract to record CS flow dynamics because the Doppler angle was smaller in the mirror section(P<0.05).CS's flow pattern con-sisted of two positive peak spectrum in a systolic and an early-diastolic phases and an end-diastolic negative flow spectrum.The peak velocities of systole,early-diastole,end-diastole were higher than the peak velocities measured by the view of parasternal right ventricular inflow tract(P<0.05).Conclusion The mirror section of parasternal right ventricular inflow tract is more accu-rate to be used to measure the blood flow dynamics of CS than the view of parasternal right ventricular inflow tract.Transthoracic echocardiography is an ideal non-invasive tool to observe the structure and blood flow dynamics of coronary sinus clearly.