An electrocardiogram – also called an ECG . Leads (wires) are attached to your arms, legs, and chest records electrical signals as they travel through the heart. Electrocardiogram is used to look for patterns among these heartbeats and rhythms to diagnose various heart conditions.An electrocardiogram can also confirm a heart attack or a heart attack in the past.
An echocardiogram is used to evaluate heart structure and function. During this test, sound waves bounced off the heart are recorded and translated into images. The pictures can reveal abnormal heart size, shape and movement. Echocardiography also can be used to calculate the ejection fraction, or volume of blood pumped out to the body when the heart contracts and to evaluate structural heart disease including the heart valves.
A resting ECG is done while you’re sitting or lying down. It can show whether your heart has already been damaged by a heart attack.
Stress Imaging Tests
These tests show whether your heart pumps normally during stress. They also show whether arteries can meet an increased demand for blood. To prepare for the test, you may exercise on a treadmill to increase the heart rate. Or medication may be used to stress the heart.
With nuclear imaging, a small amount of weakly radioactive material is injected into a vein. The material is absorbed by the heart. This enables a scanning camera to take pictures of blood flow through the heart muscle.