Hemodynamics #1

Question 0

LCX Cercumflex feeds

Answer 0

Lateral wall

L-Dominant: posterior wall / AV node (10%)

Question 1

LAD supplies

Answer 1

LV anterior wall
LV anterior 2/3 of septum
-RBB, L Anterior fascicles of LBB
Papillary muscle

Question 2

RCA => PDA (as it comes around of back) supplies?

Answer 2

• SA node (SA nodal artery)
• RV
• AV node (marginal artery)
• LV posterior wall
• LV inferior wall

Question 3

L posterior fascicles of LBB has three supplies:

Answer 3

1 from LAD

2 from RCA

Question 4

Hemiblock

Answer 4

Left anterior fascicular block
More common that posterior block
Characterized by L axis deviation

Question 5

RBB

Answer 5

S-wave: I, V5, V6

Qrs duration > 0.12

Question 6

LBB

Answer 6

S-Wave: V1, V2 (negative)
R-Wave: V5, V6 (positive)
QRS >0.12
-paradoxical splitting of S2 (split on expiration, not inspiration)

Question 7

Coronary perfusion Pressure calculation

Answer 7

CPP= arterial diastolic pressure - wedge pressure

Question 8

ST depression/elevation, T-wave inversion, Q-wave

Answer 8

ST depression: subendocardial injury
ST elevation: transmural injury
T-wave inversion: early injury
Q-wave: infarcted tissue

Question 9

L Main Occlusion

Answer 9

Lateral, anterioseptal AMI

Question 10

Q-Wave characteristics

Answer 10

Small Q wave normal in lateral leads

Path:
Duration > 0.04 (1 small box)
1/3 amplitude if QRS

Question 11

Posterior wall MI reciprocal change & V-leads/placement

Answer 11

Reciprocal: V1, V2, V3, V4

V7: posterior auxiliary line
V8: mid-scapular
V9: Peri-Spinal

Question 12

12-lead heart sections

Answer 12

Inferior: II, III, aVF
Septal: V1, V2
Anterior: V3, V4
Lateral: I, aVL, V5, V6
RV: V1R -V6R

Question 13

Typical Reciprocal change w/ anterior lateral AMI

Answer 13

II, III, aVF

Question 14

Typical Reciprocal change w/ inferior & posterior

Answer 14

Inferior: V1, V2, V3 or I, aVL
Posterior: V1, V2