lab 4- arrhythmia

Question 1

pacemaker of heart

Answer 1

SA node

Question 2

how to identify origin of impulse

Answer 2

sinus, atrial, junctional, ventricular (steps in lab book)

Question 3

R wave

Answer 3

any positive deflection

Question 4

Q wave

Answer 4

any negative deflection before the R wave

Question 5

S wave

Answer 5

any negative deflection after the R wave

Question 6

R’

Answer 6

R prime, second positive deflection after first R wave

Question 7

QS wave

Answer 7

negative deflection missing an R wave

Question 8

regular cadence

Answer 8

equal R-R intervals, can predict I I I I

Question 9

regularly irregular

Answer 9

irregular pattern II II II

can still predict

Question 10

irregularly irregular

Answer 10

distance between Rs differs, no pattern

Question 11

atrial electrical impulse

Answer 11

P wave abnormal, positive
PR interval normal
QRS interval normal

Question 12

junctional electrical impulse

Answer 12

P wave absent or negative
PR interval short
QRS normal

Question 13

ventricular electrical impulse

Answer 13

P wave absent
PR interval absent
QRS wide, bizarre

Question 14

couplet

Answer 14

2 premature beats in a row

Question 15

bigeminy

Answer 15

every 2nd beat is premature

Question 16

trigeminy

Answer 16

every 3rd beat is premature

Question 17

quadrigeminy

Answer 17

every 4th beat is premature

Question 18

fixed-rate pacemakers

Answer 18

regular cadence
never varies
atrial, ventricular or dual chambered

Question 19

demand pacemakers

Answer 19

regular or irregular cadence
only when needed
atrial, ventricular or dual chambered