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19 Cards in this Set
- Front
- Back
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Afterload |
The force against which the heart contracts, such as the blood pressure. |
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Cardiac Cycle |
Events that occur in the heart during the heart beat. |
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Cardiac Output |
Amount of blood pumped by the heart in 1 minute (about 5000ml) Determined by the heart rate and stroke volume |
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Cardiac Reserve |
The potential increase in cardiac output above resting cardiac output. |
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Chronotropic Effect |
A change in heart rate A positive chronotropic effect is an increase in heart rate. A negative chronotropic effect is a decrease in heart rate. |
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Diastole |
Relaxation phase of the cardiac cycle |
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Dromotropic Effect |
A change in the speed of the action potential (electrical signal) As it moves from the Sinopatrial (SA) Node through the bundle of his // purkinje fibers system |
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Ejection Fraction |
The percentage of the ventricular volume that is pumped or ejected during ventricular systole |
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End-Diastolic Volume |
The volume of blood in the ventricle at the end of its resting phase (diastole) also called preload |
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Inotropic Effect |
A change in the strength or force of myocardial contractions that does not involve stretching the myocardial fibers. |
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Preload |
The degree of ventricular myocardial stretch ; end diastolic volume |
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Pulmonary Edema |
The accumulation of fluid within the lungs |
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Starling Law of the Heart |
Refers to the relationship between myocardial stretch and the strength of myocardial stretch and the strength of myocardial contractions |
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Stroke Volume |
Amount of blood that the ventricles pump in 1 heartbeat |
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Sympathomimetic |
A drug or action that resembles the firing of the Sympathetic Nervous System |
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Systole |
Contractions of the Myocardium |
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Vagolytic |
Any action or drug that blocks the action of the vagus nerve |
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Vagomimetic |
Any action or drug that resembles the action of the vagus nerve. |
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Venous Return |
The rate of blood flow back to the heart. |
