An electrical wave moving in the direction of a positive electrode will:

A) cause a positive deflection on the ECG.
B) produce a significant amount of artifact.
C) cause a negative deflection on the ECG.
D) manifest with narrow QRS complexes.

Answer: A) cause a positive deflection on the ECG.

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Approximately 80% of which special patient population presents to surgery with one or more comorbid conditions?

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