Electrical System of the heart
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Transcript Electrical System of the heart
Electrical System of the
heart
Taelar Shelton, MS, ATC, AT/L
Systole vs Diastole
Systole: contraction
Diastole: relaxation
Events in cardiac cycle
Atrial systole with ventricular diastole
Blood flows from atria to ventricles
“Lubb”
Ventricular systole with atrial diastole
Blood flows from ventricles to arteries
“Dubb”
Atrial and ventricular diastole
Electrical System
Electrical Impulse
SA node: pacemaker, starts the electrical impulse
Located in the right atrium
Causes the heart to contract
AV node: bridge between the atria and ventricles
Purkinje system: carry the electrical signals throughout
the ventricles to make them contract
EKG