EKG

Question 1

what does the P wave represent?

Answer 1

atrial depolarization (SA node firing)

Question 2

what does the PR interval represent?

Answer 2

time from atrial depolarization to ventricular depolarization

Question 3

what does the QRS complex represent?

Answer 3

ventricular depolarization (impulse traveling through bundle branch and purkinje fibers)

Question 4

where QRS returns to isoelectric line

Answer 4

j point

Question 5

what does the T wave represent

Answer 5

ventricular repolarization

Question 6

what is a regular P interval?

Answer 6

0.12-0.20

Question 7

what is a regular QRS interval?

Answer 7

<0.12

Question 8

what is a normal QT interval?

Answer 8

less than half of R-R interval

Question 9

what is a prolonged PR interval called?

Answer 9

first degree AV block

Question 10

what is a prolonged QRS interval called?

Answer 10

bundle branch block

Question 11

what is the treatment for sinus brady?

Answer 11

check if symptomatic (hypoTN?, AMS?, chest pain?)
if asymptomatic, no treatment
if symptomatic, atropine 1mg IV (3mg max)

Question 12

what to do if atropine isnt effective for bradycardia?

Answer 12

transcutaneous pacing
or
dopamine/epi

Question 13

how to treat sinus tacycardia

Answer 13

treat the casue (pain, oxygen, fluid)
or meds (beta-blockers or CC blockers)

Question 14

what meds can be used for sinus tach

Answer 14

beta blockers or calcium channel blockers

Question 15

treatment of sinus arrythmia/dysrhythmia

Answer 15

symptoms are uncommon and generally don’t require treatment