Method for measuring different phases of left ventricular systole period with ultrasonic Doppler and synchronism electrocardiogram in normal persons / 生物医学工程学杂志

ABSTRACT

This study of methodology was aimed to assess the feasibility of measuring different phase of left ventricular systole period with ultrasonic Doppler and synchronism electrocardiogram. We measured the phases of left ventricular systole period and left ventricular volumes in 13 normal persons, using spectrum of aortic valve orifice flow and synchronism electrocardiogram. The values measured by routine method and by Doppler method were compared. The correlation and agreement between the measures ascertained by the two ways were analyzed. The time parameters of end systole of left ventricule showed no significant difference between the two ways (P>0.05); there was high linear correlation between the two parameters (r=0.91, P<0.01); there were good agreements between the two parameters of the two ways by Bland-Altman analysis. The volume parameters of left ventricular systole end showed no significant difference between the two ways (P>0.05); there was high linear correlation between the two parameters (r=0.97, P<0.01); there were good agreements between the two volume parameters of the two ways. The volume in the left ventricular systole end determined by Doppler method and the volume in the left ventricular diastole end determined by the routine method showed no significant difference (P>0.05); there was high linear correlation between the two parameters (r=0.98, P<0.01); there was good agreement between the two volume parameters of the two ways. It is feasible to measure different phases of left ventricular systole period with the combined use of ultrasonic Doppler and synchronism electrocardiogram, and this combinaterial method and the routine method can be replaced with each other according to the clinical setting.