A&p Cardiac#2-Bushsrna

Front 1

Thickness of muscle wall in Right Atrium

Back 1

2mm

Front 2

Thickness of muscle wall in Right Ventricle

Back 2

4-5mm

Front 3

Thickness of muscle wall in Left Ventricle

Back 3

8-15mm

Front 4

Left Main Artery divides into the ____________ & ____________.

Back 4

LAD & left circumflex

Front 5

LAD (Left Anterior Descending) provides flow to.....?

Back 5

-anterior 2/3 of inter-ventricular septum
-right and left bundle branches
-anterior & posterior papillary muscles of the mitral valve
- anterior lateral and apical walls of AV
-Provides collateral circulation on the anterior wall of the RV

Front 6

Left Circumflex supplies......?

Back 6

- supplies blood to the posterior wall of left atrium and lateral AV
-anterior papillary muscle
-AV node- 10%
- SA Node - 40-50%

Front 7

Right Coronary supplies?...........

Back 7

-supplies blood to SA & AV nodes
- RA & RV
- Posterior third of inter-ventricular septum
- posterior fascicle of left bundle branch & inter-arterial septum

Front 8

3 major systems of venous drainage?

Back 8

-coronary sinus
-anterior coronary veins
- Thebesian veins

Front 9

Coronary Sinus

Back 9

-Collects 85% blood from LV
- Receives blood from great middle & small cardiac veins
- Posterior left ventricular vein
-gives blood to RA

Front 10

Anterior Cardiac Veins

Back 10

Drain anterior RV wall

Front 11

Thesbesian Veins

Back 11

-Drain into various chambers, esp RA, RV, & LV
- Can carry up to 40% of blood returned to RA

Front 12

Cardiac Output

Back 12

Normal 5 L/min

=SVxHR

Front 13

Cardiac Index

Back 13

= CO/BSA
- Normal 2.5 L/min

Front 14

Percentage of total blood volume in the veins?

Back 14

64%