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Chapter 7-Cardio

Cardiovascular System

QuestionAnswer
Afterload The resistance (pressure) in arteries that must be overcome to empty blood from the ventricle.
Arrhythmia (dysrhythmia) A variation from the normal rhythm.
Automaticity The ability of cardiac muscle to generate impulses.
Bradyarrhythmia Bradycardia associated with an irregularity of heart rhythm.
Bradycardia A slower-than-normal heart rate
Cardiac Output Amount of blood pumped by the heart per minute.
Cardiac Remodeling Change in the size, shape, structure, and physiology of the heart due to damage to the myocardium.
Chronotropic Affecting the heart rate
Depolarization Neutralizing of the polarity of a cardiac cell by an inflow of sodium ions. Depolarization results in contraction of the cardiac cell and renders it incapable of further contraction until repolarization occurs
Diastole Relaxation phase when the chambers of the heart are filling with blood.
Inotropic Affecting the force of cardiac muscle contraction
Preload The volume of blood in the ventricles at the end of diastole
Premature Ventricular Contraction Contraction of the ventricles without a corresponding contraction of the atria. PVCs arise from an irritable focus or foci in the ventricles.
Repolarization The return of the cell membrane to its resting polarity after depolarization.
Stroke Volume The amount of blood ejected by the left ventricle with each beat
Systole Contraction of the heart muscle.
Tachyarrhythmia Tachycardia associated with an irregularity in normal heart rhythm.
Tachycardia A faster-than-normal heart rate.
Created by: Radicalentity888
 

 



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