1.

Which wave from ECG waveforms becomes widened when the self-triggering impulse does not arrive through the AV node?(a) P wave(b) QRS wave(c) ST wave(d) T wave

Answer» The correct choice is (b) QRS wave

To elaborate: Sometimes irritation occurs in the ventricles, the self-triggering impulse does not arrive through the node and thus travels a different and slower path in spreading over the ventricles. The QRS wave then becomes widened and is classified as a ventricular ectopic beat.


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