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18 Cards in this Set
- Front
- Back
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Ventricles have thicker walls than atria and generate higher blood pressures. True/False
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True. Ventricles require a greater pumping potential than atria.
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Do the left ventricles have thicker walls?
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Yes. In comparison to the right, the ventricular pumping force is greater. It is a systemic pump.
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What is the approximate mass of the left ventricle?
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As measured by MRI, it measures about 143 g with a range of 87-224g.
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What is an average stroke volume of the left ventricle?
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About 70mL.
Ejection fraction is about 58-60%. HR is 75 bpm CO = 5.25 L/minute (variable) End Diastolic volume-100-120mL |
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What is End diastolic dimension? (EDD)
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It is the approximate diameter across a ventricle at the end of diastole. This usually refers to the transverse (left to right) internal luminal distance, excluding the thickness of walls.
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What is the normal measurement of the left ventricular end diastolic dimension. (LVEDD)
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It is about 48mm. May range from 36-56mm.
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What is the right ventricular end diastolic dimension? (RVEDD)
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It can range from 10-26mm.
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What is End Systolic Dimension? (ESD)
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It is similar to the EDD, but is measured at the end of systole (after ventricles have pumped out blood).
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What is Left Ventricular End Systolic Dimension? (LVESD)
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It ranges from 20-40mm.
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What is Right Ventricular End Systolic Dimension? (RVESD)
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It ranges from 10-26mm.
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What is Interventricular septal end diastolic dimension? (IVSd)
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It averages about 8.3mm.
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What is Left ventricular diastolic posterior wall dimension? (LVPWd)
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It averages as well about 8.3mm.
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What is Left atrial dimension? (LAD)
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It ranges 24-40mm.
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What is Fractional Shortening? (FS)
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It is the fraction of any diastolic dimension that is lost in systole.
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What is FS when referring to endocardial luminal distances?
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It is measured as:
EDD minus ESD divided by EDD X 100 when measured in a percentage value. |
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Regarding EDD and ESD, can normal values differ?
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Yes. This is dependent on which anatomical plane is used to measure the distances.
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What are normal range measurements in comparison to digressing ranges (pathologic measurements)?
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Normal range- 25-45%
Mild range 20-25% Moderate is 15-20% Severe is <15% Both endocardial and midwall FS are dependent on myocardial wall thickness, and dependent on long axis function. |
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What is Wiggers diagram?
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It is a diagram of various events of the cardiac cycle, demonstrating left ventricular volume as a red trace.
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