the resistance (pressure) in arteries tha must be overcome to empty blood from the venticle
Afterload
a vaiation from the normal rhythm
Arhythmia (Dysrhythmia)
a slower than normal heart rate
Bradycardia
neutralizing of the polarity of a cardiac cell by an inflow of sodium ions. Deplarizaton results in contracton of the cardiac cell and renders it incapable of further contracion until repolarization occurs
Depolarization
Affectng the force of cardiac muscle conraction
Inotropic
the volume of blood in the ventricles at the end of diastole
Preload
contraction of the ventricles without acorresponding contraction of the atia. PVCs arise from an irritable focus or foci in the ventricles
Premaure Venticular Contraction (PVC)
the amount of blood ejected by the left ventricle with each beat
Stroke Volume
tachycardia ssociated with an iregularity in normal heart rhythm