EKG

Question 1

what is the normal QT interval

Answer 1

0.4-0.43 (essentially two large boxes)

Question 2

what is the normal PR interval

Answer 2

0.12-.2 (less than one large box.)

Question 3

what is the normal QRS interval

Answer 3

0.08-0.10 (two small boxes)

Question 4

wha ti the normal RR interval

Answer 4

0.6-1 seconds two large boxes

Question 5

what leads are the inferior leads

Answer 5

II, III, avf,

Question 6

what leads are the lateral leads

Answer 6

I, aVL, V5 and V6

Question 7

what are the anterior leads

Answer 7

V3, V4

Question 8

what are the septal leads

Answer 8

V1 and V2

Question 9

what is the presentation of LBBB

Answer 9

QRS > 120msec, broad, notched or slurred R wave in leads AVL, V5, V6 or lead 1

Question 10

what is the presentation of RBBB

Answer 10

RsR in V1. QRS > 120 msec

Question 11

what is the most specific finding for left ventricular hypertrophy

Answer 11

this is an R wave > 11mm in AVL

look for deep R in V5/V6
deep S in V1/V2

Question 12

what is the progression of an MI

Answer 12

hyperacute T waves,
ST elevation
T wave inversion
Q waves

Question 13

what is the sign for limb lead reversal

Answer 13

inverted T waves/QRS in lead I

Question 14

what is the best way to determine hyperkalemia

Answer 14

tented T waves that are symmetric, narrow-based, pointed.

Question 15

what is the presentation of hypercalcemia

Answer 15

short QT interval

Question 16

what is the presentation of hypocalcemia

Answer 16

long QT interval