👉 The Ballistocardiogram (also known as a Cardiac Doppler) is a diagnostic tool used to measure and visualize the flow of blood in the heart. It involves listening for the sound of heartbeats, which can be heard by the listener or recorded by a recording device. The ballistocardiogram is typically performed on an electrocardiogram (ECG), but it can also be done with a different type of recording device such as a pulse oximeter. The Ball
