Question 1
In sinus block
◦ the heart rate varies from 100 to 160.
◦ all R-R intervals are constant.
◦ there are P waves inside the pause.
◦ the pause is a multiple of the R-R intervals.
Question 2
In sinus rhythm, the heart rate is
◦ 60—100.
◦ greater than 100.
◦ less than 60.
◦ greater than 170.