Author Question: In most ECG leads, a normal Q wave is less than 0.04 seconds in duration and less than one-third of ... (Read 38 times)

jwb375 · **on:** Jun 25, 2018

In most ECG leads, a normal Q wave is less than 0.04 seconds in duration and less than one-third of the amplitude of the R wave in that lead.

Indicate whether the statement is true or false

Question 2

An ECG rhythm strip shows a ventricular rate of 46 bpm, a regular rhythm, a PR interval of 0.14 seconds, a QRS duration of 0.06 seconds, and one upright P wave before each QRS. This rhythm is _____.

a. sinus rhythm
b. sinus bradycardia
c. sinus arrest
d. sinoatrial block

cici · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

T
With the exception of leads III and aVR, a normal Q wave in the limb leads is less than 0.04 seconds in duration and less than one third of the amplitude of the R wave in that lead.

Answer to Question 2

B
The rhythm described fits the ECG criteria for a sinus bradycardia.