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34 Cards in this Set
- Front
- Back
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Where does the SA node lie?
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At the junction of the SVC&RA
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Which of the cardiac chambers has the thickest wall
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The LV
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The second heart sound C2 is caused by what two valves
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The semilunar valves ( aortic & pulmonic)
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What branch of the conductions system feeds the Moderator Band?
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The Right Bundle Branch
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What Valves open in Ventricular Diastole ?
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The AV valves ( Mitral & Tricuspid)
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Aortic Stenosis is classified as what type of disease?
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Outflow obstructive
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Which hemodynamic measurement most directly reflects left ventricular afterload.
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Mean blood pressure
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In a normal patient with fixed CO the mean B/P is determined chiefly by?
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Afterload
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The Diaphragmatic surface of the LV is also called?
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Inferior Wall
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Normal heart conduction sequence to the Bundle of His is?
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SA node-RA muscle-LA muscle- AV node
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Normal heart conduction sequence after a impulse travel's through the AV node
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Bundle of His - Bundle Branches - Purkinge fibers
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What happens at the Dicrotic Notch
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This is when the semilunar heart valves close.
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Actions of Alpha 1
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NS receptors in vascular smooth muscles which cause stimulation of arterial vasoconstriction
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Actions of Beta 1
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NS receptors in the heart muscle & AV node stimulation of HR.
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Beta 2
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NS receptors in the lungs which cause Bronchodilation
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When do the AV valves open?
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They open and fill the ventricals during Diastole
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The prefix " micro" is
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1.0 x 10^ -6
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One cubic centimeter (cc) equals
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1.0 ml
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What are the units to measure aortic valve area?
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cm^2
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What is the formula for converting Celsius to Fahrenheit
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((9/5) C ) + 32
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What is the standard atmospheric p at sea level
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760 mmHg = 15 psi
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How long is one Micron ?
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10 ^ -6 meters
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What cardiac structure normally blocks A-V conduction in the A-V groove?
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Fibrous rings (cardiac skeleton)
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The most anterior cardiac chamber is the ?
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RV
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The most posterior cardiac chamber is the ?
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LA
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Where is the SA node ?
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Crista Terminalis
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The outer layer of the LV is ?
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Epicardium
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Flow through the right AV orifice passes through The ?
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Tricuspid valve, this is the valve between the RA & RV
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The inner layer of the LV is ?
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Endocardium
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Capillaries are composed of ?
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A single layer of endothelium
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When increased B/P is sensed in the arteries, the baroreceptors reflex causes?
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Decreased HR
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Concerning the ion transfer across myocardial cell membrane throughout systole is ?
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Potassium seeps out
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The aortic dicrotic notch marks the beginning of ventricular ?
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Isometric relaxation
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End-diastolic stretching of the ventricular muscle fibers is termed?
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Prelaod
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