[CVS] Q.14) What is ECG? Give its importance.

Ans:

It is a graphical recording of electrical changes of the heart by electrodes to the surface of the body.

Importance:

1. ECG gives accurate information about sinus rhythm, conduction intervals and cardiac axis.
2. Helps in diagnosis of myocardial ischemia.
3. Helps in diagnosis of myocardial infarction.
4. Helps in diagnosis of heart block.
5. Helps in diagnosis of ventricular hypertrophy.
6. Helps in diagnosis of arrhythmia, fibrillation etc.
7. Helps in diagnosis of early stage of hyperkalemia.
8. Effects of drugs:

            a) Digitalis

            b) Quinine