Q.

The amplitudes of the segments of the wave are                          

A. P = 0.25 mV, Q = 0.4mV, R = 1.60mV, T = 0.1 – 0.5 mV
B. P = 2.0 mV, Q = 0.1mV, R = 1.60mV, T = 0.1 – 0.5 mV
C. P = 25.0mV, Q = 4.0mV, R = 16.0 mV, T = 10 – 50 mV
D. P = 0.25 mV, Q = 0.60mV, R = 1.60mV, T = 0.1 – 1.0 mV
Answer» A. P = 0.25 mV, Q = 0.4mV, R = 1.60mV, T = 0.1 – 0.5 mV
Explanation: The waves of ECG are a result of electrical impulses and so they have an amplitude. The various waves are a result of the stepwise contractions of the heart. P wave is the depolarization of the atria, QRS complex is formed due to depolarization of the ventricles and then T wave represents the re-polarization of the ventricles.
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