CARDIOVASCULAR
SYSTEM
1. Aorta
2. Sup vena cava
3. Pul artery
4. Pul vein
5. Right atrium
6. R ventricle
7. Inf vena cava
8. Pul artery
9. Pul vein
10. Left atrium
11. L ventricle
12. Abdominal aorta
HEART BEAT
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

http://wwwmedlib.med.utah.edu/kw/pharm/hyper_he
art1.html
Note the flow of blood through the heart
(order)
http://www.medlib.com/spi/coolstuff2.htm
Why are there 2 sounds but only one
pulse?
Flow of blood


Right side of heartlungs (get O2)left
side of heartarteriescapillaries
(body)veins right side of heart
http://www.smm.org/heart/heart/circ-f.htm
HEART BEAT


Why are there two
sounds but only one
pulse?
Beat starts with SA
node in upper right
atrium.

SA node is a group of
self-stimulating cells
that seems to be in
charge of heart rhythm
HEART BEAT 2


Wave of depolarization
spreads across atria
through Purkinje fibers
and the atria contract.
The AV node in the
bottom of the right atrium
is stimulated and the
ventricles are stimulated
to contract
ECG
Abnormalities of ECG


Differences in waves
from normal are used
for diagnosis
They are not often as
obvious as those in
the accompanying
illustration
Heart disease

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

# 1 killer in this country
Not really heart disease
but coronary blood vessel
disease
Blocked artery causes
heart muscle death
When heart muscle dies,
regular contraction of the
heart is blocked
Causes

Genetics



Evidence that genes have
much to do with deposits of
fat in artery walls
Diet
Lack of exercise

Evidence that exercise
causes production of
proteins that remove
plaques from artery walls
“Cures” for blocked heart
coronary arteries

Balloon angioplasty

Stents


Tube is put into artery
to allow blood to pass
through
Coronary bypass