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18 Cards in this Set
- Front
- Back
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Stroke Volume
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The amount of blood ejected from the ventricle with each beat. |
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Normal Stroke-Vol is... ml/beat/minute
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60-100 ml/beat/min
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Preload
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The stretch on the myocardial muscle fibers at the end of diastole and is determined by the volume of blood filling the ventricle ant the end of diastole. |
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Excessive Preload
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Ventricular Preload calculates which 2 things?
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& Volume |
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Right Ventricular Preload pressure is measured in which area? FYI: (there are 2 names/acronyms) |
RAP (Right Atrial Pressures) or CVP (Central Venous Pressures) |
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Right Ventricular Preload is normally?
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2 - 6 mm/Hg (this is the pressure) |
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Right Ventricular Preload RVEDP |
RVEDP (Right Ventricular End Diastolic Pressure) This measurement is acquired by a special Volumetric Catheter that measures the right ventricular EDV |
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Right Ventricular Preload RVEDP Normal Volume is? |
100 - 160 ml
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Left Ventricular Preload
How is it measured?
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AKA: Wedge pressure |
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Left Ventricular Preload
How is this pressure obtained?
How do we measure it? |
Obtains Left Atrial Pressure.
Occludes blood flow distal to catheter tip and creates a static column of blood that reflects pressure back from the left atrium (Swan-Ganz) |
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Left Ventricular Preload Normal Pressure is? |
PAOP/WEDGE
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Left Ventricular Preload PAOP is a good indicator of LV pressures UNLESS....... |
There is disease in the mitral valve or decreased LV compliance. (remember... aka "wedge") |
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Left Ventricular Preload Other ways to measure the Left Ventricular Filling Pressure? 2 total |
PaD - Pulmonary Artery Diastolic Pressure -if no pulmonary hypertension Present Mean Left Atrial Pressure - if there is a catheter in the left atrium. |
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Noninvasive Assessment of Preload: -increased -decreased |
Increased preload indicates roughly... -volume and distention -SOB, Decreased O2 -Weight Fluctuations Decreased Preload indicates roughly... |
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Indicates cardiac output considering patient body surface area |
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Cardiac output |
The volume of blood ejected by the ventricles each minute. Stroke volume per beat per min.
Normally 4 -8 liters per minute
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3 determinants of stroke volume |
Preload Afterload Contractility |
