In a normal ECG?

Question

A.) QRS complex is mainly negative due to spread of depolarization down

B) the P wave indicates the condition of the conductive system

C) the T wave is a positive wave in all chest leads

D) the P wave represents depolarization of atrial myocardium

E) QRS is due to depolarization in the ventricular septum

Answer 1

D.

The others are incorrect because:

A and C: These can be deflected positively or negatively depending on the lead you are assessing. Additionally, an inverted T-wave (one deflected negatively) occurs in both normal and abnormal conduction patterns but both occur.

B: The P wave indicates depolarization of the atriums and is not representative of the functional ability of the conduction system as a whole.

E: QRS is the depolarization of the ventricles, not just the ventricular septum.