Heart Rate (lec 3)

Question 1

5 steps of ECG analysis?

Answer 1

1) rate
2) regular rhythm
3) P waves
4) QRS complexes
5) PR intervals

Question 2

Normal sinus rhythm characteristics? (6)

Answer 2

rate = 60-100 bpm
rhythm = regular
P wave = upright, round, before QRSC
QRSC = narrow, 0.06 - 0.11 sec
PR int = 0.12 - 0.20 sec
T wave = upright, slight asymm

Question 3

Determine HR:

6 sec interval

Answer 3

count # of QRSC in 30 big blocks

x 10

Question 4

Determine HR: (slide 39)

300, 150, 100, 75, 60, 50

Answer 4

can’t use w/ irreg rhythm
find R wave near bold line,
find next R wave -> it’s bold line it HR

150 - 100: ea box is 10
100 - 75: ea box is 5
75 - 60: ea box is 3
60 - 50: ea box is 2

Question 5

Determine HR:

1500

Answer 5

most accurate
can’t use w/ irreg rhythm
count small squares b/w to R waves,
divide by 1500