Electrocardiogram is a tool for evaluating the electrical impluses which go through the muscular tissue of the heart.The electrical impluses can be detected at the body surface by attaching small metal plates at different sites of the body that measures the impluses of different parts of heart.When muscle contracts there is a change in the electrical potential across the membrane of muscle fibers that change in electrical potential is traced on the graph paper k/a ECG.
the normal ECG tracing shows 5 waves named P,Q,R,S&T.
The P wave is caused by the impulse of artia contraction & this is called artial depolarization.
The Q,R & S waves indicate the spread of the impluse and the contraction of the ventricular muscle .this is called ventricular depolarization.
The T wave represents the time of relaxation of the heart that is called repolarization
By examining the pattern & time of wave intervalbetween cycle & different parts of cycle the physician obtains valueable information about disease condition.
the normal ECG tracing shows 5 waves named P,Q,R,S&T.
The P wave is caused by the impulse of artia contraction & this is called artial depolarization.
The Q,R & S waves indicate the spread of the impluse and the contraction of the ventricular muscle .this is called ventricular depolarization.
The T wave represents the time of relaxation of the heart that is called repolarization
By examining the pattern & time of wave intervalbetween cycle & different parts of cycle the physician obtains valueable information about disease condition.
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