Heart Model

The TM mode (time motion) is used for the examination of movement sequences in the ultrasonic image. The echoes are here continuously recorded along the sound axis. This way one can record e.g. movements of the cardiac wall and/or heart valves. The heart model includes a movable membrane, the echo of which produces a TM-mode image similar to a movement of the heart valve and/or cardiac wall. The membrane is periodically arched upward with the rubber ball. Due to a slow return flow of air one receives a characteristic curve progression. The wall speed and the stroke volume can be calculated from the recorded curve.