ECGs

Question 1

hOw do you determine HR?

Answer 1

Large boxes btw qrs
1-300bpm
2-150
3-100
4-75
5=60
6=50

Question 2

How do you identify sinus rhythem?

Answer 2

P wave befor every QRS, normal PR interval (<.12 sec)

Question 3

HOw do you identify PACs?

Answer 3

extra atrial contraction, consisting of abnormal p wave. PACs may be forllowed by normal or abnormal QRS

Question 4

which lead is best for arrhythmia and which for ischemia?

Answer 4

Lead II arhythmia

Lead V ischemia

Question 5

what are chriteria for ischemia identifiacation

Answer 5

ST depression > 0.1 mV
ST elevation >0.2=myocardial injury, sometimes reversible
peaked T wave