A very widened QRS is seen in

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Quizplus · Accepted Answer

Severe hyperkalemia can cause a widened QRS complex on an electrocardiogram (ECG) due to decreased conduction velocity in the His-Purkinje system. The slowed conduction results in delayed activation of the ventricles, which is responsible for the widening of the QRS complex. Severe hypokalemia can cause a prolonged QT interval on ECG, but not a widened QRS complex. Severe hypocalcemia and hypercalcemia can also cause ECG changes, such as prolongation of QT interval, but not a widened QRS complex.

A Very Widened QRS Is Seen in