Which of the following statements concerning Q waves on the ECG is most accurate?
A) Q waves are not a normal finding on the ECG.
B) The absence of a Q wave is a significant pathophysiological finding.
C) A Q wave is significant if it is 0.04 or more seconds wide.
D) A Q wave is significant only in the presence of chest pain.

Question

Quizplus · Accepted Answer

Q waves can be a normal finding in some leads of the ECG, especially in the lateral leads. However, when a Q wave is present in the inferior or anterior leads, it may indicate previous myocardial infarction or another pathological process. The significance of a Q wave is not determined by the presence or absence of chest pain, but rather by the duration of the wave. A Q wave is considered significant if it is 0.04 seconds or more in duration.

Which of the Following Statements Concerning Q Waves on the ECG