Author Question: The QRS of an ECG falls on a dark vertical line of the ECG paper. Subsequent QRS complexes fall on ... (Read 34 times)

wenmo · **on:** Jul 16, 2018

The QRS of an ECG falls on a dark vertical line of the ECG paper. Subsequent QRS complexes fall on every other dark line (10 mm apart). What is the ventricular rate?

a. 300/min
b. 200/min
c. 150/min
d. 100/min

Question 2

What parameter is measured on the vertical axis of the ECG paper?

a. Time
b. Voltage
c. Cardiac contraction rate
d. Blood flow

lkanara2 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
You can count the number of large boxes between two successive complexes and divide this number by 300 to obtain the heart rate.

Answer to Question 2

ANS: B
ECG paper is made up of gridlike boxes that define time on the horizontal axis and voltage on the vertical axis.