cardio cpm

Question 1

what are the limb vs chest leads?

Answer 1

limb = I, II, III, aVR, aVL, and aVF

chest = V1, V2, V3, V4, V5, V6

Question 2

if the rhythm is regular…

Answer 2

R-R intervals are equal

Question 3

how do you find the rate?

Answer 3

300/R-R

1 box = 300
2 boxes = 150
3 boxes = 100
4 boxes = 75
5 boxes = 60

count how many boxes are between the R-R than 300/

Question 4

if the rhythm is irreg…

Answer 4

count how many R waves in 6 secd and x10

Question 5

what is the normal heart rate?

Answer 5

60-100 bpm

Question 6

norm sinus P wave is upright in leads…

Answer 6

I, II, aVF, and V4-6
neg in leads III and V1

Question 7

tachy vs bradycardia

Answer 7

tachy = >100
brady = <60

Question 8

what is PAC

Answer 8

irreg rhythm

P wave in front of every QRS, but the one with a premature beat will look diff

QRS measures <0.12 secs

Question 9

what is PVC?

Answer 9

irreg rhythm

NO P WAVE BEFORE premature beat

QRS <0.12 secs, QRS WILL BE WIDE AND BIZZARE

Question 10

what is afib?

Answer 10

irreg rhythm

NO PREVIOUS P WAVES in rhythm –> baseline appears chaotic because atria are fibrillating so NO P WAVES PRODUCED

QRS <0.12 secs

Question 11

what is atrial flutter?

Answer 11

atrial rate is reg while ventricular rate is irreg

P waves are well defined with SAWTOOTH appearance

QRS <0.12 secs

Question 12

what is supra ventricular tachy?

Answer 12

rhythm is reg

P wave is SUPERIMPOSED upon QRS complex

QRS <0.12 secs

Question 13

what is junctional rhythm?

Answer 13

due to acceleration of impulse gen from AV junction, which, if more rapid than the sinus node rate, assumes control as the dom pacemaker of heart

in this case, no P waves seen before QRS complexes

when junctional rhythm is faster than 100 beats/min = junctional tachy

rate is slow than expected sinus rate = junctional escape rhythm

Question 14

what is multifocal atrial rhythm?

Answer 14

3 or more diff P wave shapes seen

Question 15

what is the sequence of events for a STEMI?

Answer 15

1. norm ECG before MI
2. hyperacute T wave changes –> increased T wave amp and width
3. marked STEMI with hyperactue T wave changes
4. patho Q waves, less ST elevation, terminal T WAVE INVERSION (necrosis)
5. patho Q waves, upright T waves (fibrosis)

Question 16

what leads to do see an inferior MI in?

Answer 16

II, III, aVF

Question 17

what leads do you see an anteroseptal MI in?

Answer 17

V1-3

Question 18

what leads do you see an ant MI in?

Answer 18

V2-4

Question 19

what leads do you see an anterolateral MI in?

Answer 19

V2-6

Question 20

what leads do you see a lateral MI in?

Answer 20

I, aVL

Question 21

what is a non-STEMI?

Answer 21

T wave flattening or invesion
ST seg depression
Q waves are absent