The QRS of an ECG falls on a dark vertical line of the ECG paper. ...

[wenmo]

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]

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.

[wenmo]

Thanks for the timely response, appreciate it

[mjenn52]

YES! Correct, THANKS for helping me on my review