ECG

Question 1

why 12 leads if only 10 electrodes

Answer 1

Eindhoven triangle = relationship between the 3 standard leads that creates vectors which crease the 3 standard leads and three augmented leads (aVR, aVL, aVF)

Question 2

name and explain leads

Answer 2

L1 = RA to LA
L2 = RA to LF
L3 = LA to LF
AVR = RA to (LF and LA) (rightward)
AVL = LA to (LF and RA) (leftward)
AVF= Lf to RA and LA (inferior)

Question 3

indications for ecg monitoring ?

Answer 3

dyspnea
angina
abnormal HR
palpitations

Question 4

recipe for ecg interpretation

Answer 4

1. rate
2. rhythm
3. hypertrophy
4. infarction
5. ischema
6. athletes heart

Question 5

how to tell leads are correctly placed

Answer 5

All waves are negative in lead AVR

Question 6

how to tell leads are correctly placed

Answer 6

All waves are negative in lead AVR

Question 7

what is Sinus arrhythmia:

Answer 7

multiple p waves, varying distance

Question 8

what is ectopic focus)

Answer 8

missed, diff shape or inverted p wave

Question 9

difference between LVH and athletes heart

Answer 9

chamber is compromised in LVH, whereas chmaber is not compromised in athletes heart and the myocardium is stronger.

Question 10

signs of ischemia?

Answer 10

inverted t waves w upright qrs in 2 or more leads
st segment depression

Question 11

infarcation?

Answer 11

st segment elevation
q wave wider then 1 mm and deeper then 1/3 of qrs

Question 12

what is a pvc

Answer 12

ventricle contract before atria

Question 13

RBB ?

Answer 13

v1 - 3 m shape, s slurred in lateral leads

Question 14

LBB ?

Answer 14

dominent s wave, w in v1-3 , m in v6

Question 15

LVH?

Answer 15

S + R in v2 and v5 = >35
inverted t waves or st dep in lateral leads

Question 16

athlete heart?

Answer 16

peaked t waves

Question 17

athlete heart?

Answer 17

peaked t waves