An ECG that shows both positive and negative deflections of the QRS complex from the baseline would be likely showing:

Question

Quizplus · Accepted Answer

Positive and negative deflections of the wave are determined by which lead is used to view the wave.If the same lead is picking up both positive and negative waveforms,these are most likely originating from multiple foci.A bigeminy would originate from the same place and likely be consistently positive similar to a PVC occurring at regular intervals.Disruption of the P wave would not cause changes to the QRS complex.

An ECG That Shows Both Positive and Negative Deflections of the QRS