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Final Exam


Systole Heat muscles are contracting .
Diastole Heart muscles are at rest.
Cardiac Output Volume of blood into the aorta each minute by the heart.
Ejection Fraction Percentage of blood pumped out of a ventricle with each contraction.
Myocardial Cells Working mechanical cells
Pacemaker Cells Specialized cells for electrical conduction (automatic)
Properties of Cardiac Cells Automaticity Excitability Conductivity Contractility
SA Node Located: Top right atrium Function: "Pacemaker"
AV Node & Bundle Located: Floor (base) of right atrium Function: Impulses from atria to ventricles Secondary (40-60 beats)
Right & Left Bundle Branches Atrial ventricular spectum area (muscle) Less than 20 beats
Purkinje Fibers Located: Lower apex Function: Receive impulses
Leads Record of electrical activity between 2 electrons
Electrodes "Pads" applied on body
P Wave Atrial Depolarization (Contracting)
QRS Complex Ventricular Depolarization
T Ventricular Repolarization
Dysrhythmia Abnormal heart rhythms
SR Sinus Rhythm 60-100 beats= normal heart rate
Normal HR 60-100
Tachycardia 101-180 beast Fast Rate
Bradycardia Less than 60 beat Slow Rate
Sinus Arrhythmia Irregular rate
Premature Complexes Beat before
What Causes Atrial Dysrhythmias?
Junctional Rhythm Occur in AV Junction (no pwave)
PEA Pulse Electrical Activity
Created by: itsdelis