Cardiac conduction

Review

Valves of the heart: Tricuspid, bicuspidPulmonic, Aortic

Conduction: SA node, AV node, bundle of His, Purkinje fibers

Layers of the heart: epicardium, myocardium, endocardium

SA (sinoatrial) node and AV (atrioventricular) node are the heart’s pacemakers

Ion

an atom or molecule where the total number of electrons is not equal to the total number of protons.

Thus has an electrical charge

Some ions in the body

H+Ca 2+K+Na+

Depolarization

Inside of the cell becomes less electronegative (less negatively charged)