In the ultrasound room, Zhou Can was personally standing next to the ultrasound doctor.
What we usually call echocardiography refers to using the principle of short-wave ultrasonic ranging: pulsed ultrasound passes through the chest wall and soft tissues to measure the periodic activity of the underlying cardiac walls, ventricles, and valves. On the monitor, it is displayed as curves showing the relationship between the activity of each structure and time, and these curves are recorded by a recorder as images.
It can very well assess the size of the heart, the function of the valves, and the left ventricular ejection fraction.
What Zhou Can wanted to examine now was precisely the left ventricular ejection fraction.
"LVEF, decreased, EF 39%."
The ultrasound doctor reported the figure to Zhou Can.
"About the same left ventricular ejection fraction as in the other hospital." Zhou Can nodded, then said to the patient, "Okay, try to dorsiflex your feet, use some strength."
