A transducer placed on the chest wall emits a short burst of ultrasound waves and then measures the reflection, or echo of the sound as it bounces back from such cardiac structures as valves and the muscle wall.
(A transducer; placed; on the chest wall) (A transducer placed on the chest wall; emits; a short burst of ultrasound waves) (A transducer placed on the chest wall; measures; the reflection, or echo of the sound; T:then) (it; bounces back; )
A transducer A transducer placed on the chest wall A transducer placed on the chest wall it
placed emits measures bounces back
on the chest wall
a short burst of ultrasound waves
the reflection, or echo of the sound T:then