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How does the heart contract?
2nd Systole
Oxygenated blood is
pumped into the Aorta
2nd Diastole
Left atrium to the
left ventricle
1st Systole
Shows a measure of the normal electrical activity of the heart
Arterial Systole
1st Diastole
Ventricular Diastole
through the cardiac cycle
What does an
ECG graph show?
How does the heart contract?
http://biology.about.com/od/anatomy/ss/cardiac_cycle.htm
http://cnx.org/content/m42352/latest/?collection=col11406/latest
The Y-Axis measures the height of the voltage
It cannot show you exactly
what is wrong,
but it can show that
there is an abnormality
The X-Axis measures time.
Alex Wolf, Connor Kirby, Alana Stillitano
Electrical signal transmission through the heart
http://heartdisease.about.com/od/
palpitationsarrhythmias/ss/electricheart.htm
Passes through AV
node in ventricles
originates in the sinus node
His-Purkinje network
contracts ventricle walls