Intraventricular Conduction Defects

Question 1

LBBB features (4)

Answer 1

prolonged QRS
tall R w/ prolonged duration & notched/flattened tops
wide R in I and V6
leads V1 and V2 show reciprocal broad deep S waves

Question 2

LAHB features (4)

Answer 2

LAD
tall R waves in lead I
deep S waves in aVF
Normal QRS

Question 3

LPHB features (4)

Answer 3

RAD
normal QRS
tall R, small Q in III
small R, deep S in lead I

Question 4

RBBB + LAHB features (4)

Answer 4

LAD
prolonged QRS
RR’ configuration
wide S wave

Question 5

RBBB + LPHB features (4)

Answer 5

RAD
prolonged QRS
RR’ configuration
S wave

Question 6

RBBB features (3)

Answer 6

prolonged QRS
M-shaped RR’ in V1
Wide S in lead I and V6

Question 7

Brugada Syndr. (3 things)

Answer 7

3 EKG patterns w/ variable ST segment elevation abnormalities

FH sudden cardiac death, hx rhythm problems/fainting spells
tx w/ implantable defibrillator