Question

Ultrasonic waves are made to reflect from various parts of the heart and form the image of the heart. This technique is called ___.

Answer 1

In electrocardiography (also known as ECG or EKG), ultrasonic waves are made to reflect from various parts of the heart and an image of the heart is produced. ECG records the electrical activity generated by heart muscle depolarizations, which propagate pulsating electrical waves towards the skin. Although the intensity of electricity is very small, it can be picked up reliably with ECG electrodes attached to the skin.