EKG

Question 0

Order of aV leads on EKG

Answer 0

RLF

Question 1

Axis on EKG

Answer 1

Upright QRS in I and aVF = Normal
Upright QRS in Lead I and downward in aVF = left-axis deviation
Downward QRS in I and aVF = right axis- deviation

Question 2

EKG lead groupings

Answer 2

V1-V2 = septal leads
II, III, aVF = inferior leads
I and aVL = lateral leads
V3-V4 = anterior leads
V5-V6 = lateral leads

Question 3

Normal intervals

Answer 3

PR = 120-200ms

QRS < 120

Question 4

AV block EKG

Answer 4

PR > 200 or P with no QRS afterwards

Question 5

LBBB EKG

Answer 5

QRS > 120
No R wave in V1
Wide, tall R waves in I, V5, V6

Question 6

RBBB EKG

Answer 6

QRS > 120
RSR’ complex ie rabbit ears
qR or R morphology with a wide R wave in V1
QRS pattern with wide S wave in I, V5, V6

Question 7

Long QT syndrome on EKG

Answer 7

QTc>440

Congenital disorder that predisposes to ventricular tachyarrhythmias

Question 8

T wave abnormalities with ischemia and infarction

Answer 8

Ischemia: new inverted T waves; poor precordial R wave progression
Transmural infarct: significant Q waves (>40 mse); ST elevations with T wave inversions

Question 9

LVH EKG

Answer 9

S wave in V1 + S wave in V5 > 35mm

Question 10

RVH EKG

Answer 10

Right axis deviation + R wave in V1 that is > 7mm