Intraventricular Conduction Delays

Question 1

3 criteria for Lown-Ganong-Levine Syndrome

Answer 1

PR interval < 0.12s
Normal QRS
No delta wave

Question 2

Wolff-Parkinson White Syndrome criteria (3)

Answer 2

PR interval < 0.12s
Wide/prolonged QRS
Delta waves

Question 3

LGL syndrome accessory pathway…

Answer 3

james fibers

Question 4

WPW syndrome accessory pathway…

Answer 4

bundle of kent

Question 5

Bundle Branch Block criteria…

Answer 5

QRS > 0.12s

Question 6

RBBB V1 abnormality…

Answer 6

RR’/M-shaped

Question 7

RBBB can show a wide S wave in which lead(s)

Answer 7

Lead I and V6

Question 8

Axis in RBBB

Answer 8

normal

Question 9

ST-T wave changes in RBBB…

Answer 9

opposite of QRS forces

Question 10

LBBB has a ______ in leads ___ and _____

Answer 10

wide R wave leads I and V6

Question 11

Other R wave abnormalities in LBBB (2)

Answer 11

Tall

notched/flattened tops

Question 12

in LBBB, where would you see deep S waves?

Answer 12

RV leads (reciprocal leads)

Question 13

ST-T wave abnormalities in LBBB?

Answer 13

none

Question 14

What change indicates hemiblock?

Answer 14

change in axis

Question 15

is QRS duration prolonged in hemiblock?

Answer 15

no

Question 16

What hemiblock?

POS lead I and aVL
NEG aVF

Answer 16

LAFB

Question 17

What hemiblock?

NEG Lead I and aVL
POS aVF

Answer 17

LPFB

Question 18

3 criteria for LAHB…

Answer 18

strong LAD (-45 to -90)

Tall R waves lead I

Deep S waves Lead III

Question 19

3 criteria for LPHB

Answer 19

Strong RAD (120 - 180)
Tall R waves Lead III
Deep S waves Lead I

Question 20

Which is more common, LAHB or LPHB?

Answer 20

LAHB