Graphic Studies of Heart and Brain
Graphic studies of Heart and Brain
1. Electrocardiogram (ECG) – graphic record of electrical activity generated by the heart during depolarization and repolarazation.
- diagnose abnormal cardiac rhythms and coronary heart disease
2. Echocardiography (ultrasound cadiography) – graphic record of motions produced by cardiac structure as high-frequency sound vibrations are echoed though chest wall into the heart.
- used to demonstrate valvular or other structural deformities, detect pericardial effudion, diagnose tumors and cardiomegaly, evaluate prosthetic valve function.
3. Electroencephalogram (ECG) – graphic record of the electrical potentials generated by the physiological activity of the brain
- used to detect surface lesions or tumors of the brain and presence of epilepsy.
4. Echoencephalogram – beam of ultrasound is passed though the head, and returning echoes are graphically recorded.
- used to detect subdural hematomas, intracerebral hemorrhage, or tumors.
