Coronary Blood Supply

What supplies the inferior wall of heart?

dominant side *RCA > LCx*

lies in interventricular groove

left anterior descending (LAD) posterior descending artery (PDA)

LAD supplies

papillary m.-anterolateral

PDA supplies (usually from RCA)

papillary m.-posteriomedial

lies in AV grove

right coronary artery (RCA) → left circumflex (LCx)

LAD supplies

septum- anterior 2/3rds

PDA supplies (usually from RCA)

septum-posterior 1/3rd

PDA supplies (usually from RCA)

AV node

EKG leads: lateral wall

I + aVL LCx

EKG leads: inferior wall

II + III + aVF RCA

LAD supplies

LV- anterior + anterolateral wall

LCX supploes

LV-lateral wall

PDA supplies (usually from RCA)

LV-posterior 2/3rds

What determines dominance? which side is most common?

RCA or LCA supplying posterior heart wall -i.e. is RCA or LCx giving off PDA? *RCA most common

RCA supplies

RV

RCA supplies

SA node

EKG leads: septal wall

V1 + V2

EKG leads: anterior wall

V3 + V4

EKG leads: anterolateral wall

V5 + V6 LAD