Vector cardiography

leads positon, graph

1. Vector cardiography

2. Vector cardiography is the technique of analysing the electrical activity of heart by obtaining ECG along three axis. The display is know as vector cardiogram. This gives the representation of distribution of electrical potential generated by the heart , and produces loop type patterns on the CRT screen .

3. The vectorcardiography examines the ECG potentials generated along the three-dimensional axes of the body . i.e., that is x, y, and z planes . The x vector is taken as the potential between two points under the arms, the y vector is between the head and right leg, and the z vector is from the front to the back of the body .

4. Leads Position :

5. GRAPHS :

6. The major information that it provides is the direction of depolarization and repolarization of the atria and ventricles. Each of the three components of the electric heart vector are detected with the same sensitivity .

7. ADVANTAGES : Sensitivity accuracy