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LV Function and Ischemic Heart Disease > Systolic Function Msmts > Flashcards

Systolic Function Msmts Flashcards

1
Q

IVCT

A

Isovolumic Contraction

  • Valves Closed
  • Volume Constant
  • Ventricular Pressure Increasing
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2
Q

IVRT

A

Isovolumic Relaxation

  • Valves are closed
  • Volume Constant
  • Ventricular Pressure Decreasing
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3
Q

When is IVRT measured?

A

Time from the closure of the AOV until Mitral flow begins

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4
Q

When is IVCT measured?

A

Measured from closure of MV until AOV flow begins.

AKA pre-ejection period

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5
Q

What serves as indirect signs of Systolic Function?

A

EPSS
MV opening
Gradual closure of AOV in systole

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6
Q

What is the formula for fractional shortening?

A

LVIDd-LVIDs/LVIDd x 100

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7
Q

What is the normal range for fractional shortening?

A

25-45%

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8
Q

What is fractional shortening derived from?

A

Linear LV cavity msmts from diastole to systole.

Gives rough estimate of systolic LV function.

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9
Q

What is the definition of Stroke Volume?

A

The amount of blood ejected per beat.

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10
Q

What is the normal range for SV?

A

70-100cc

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11
Q

What is the formula for SV?

A

SV=CSA x VTI

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12
Q

CSA

A

Cross Sectional Area
Usually LVOT
0.785 x diameter squared

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13
Q

VTI

A

Velocity Time Integral

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14
Q

What is the definition of Cardiac Output?

A

Amount of blood ejected per min

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15
Q

What is the normal range for CO?

A

4-8 lpm

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16
Q

What is the formula for CO?

A

SV x HR

17
Q

What is the definition for CI?

A

CO corrected for body size

18
Q

What is the calculation for CI?

A

CO/BSA

BSA derived from height and weight data entry

19
Q

What is the normal range for CI?

A

2.5-4.0 lpm/m squared

20
Q

What does Ejection Fraction estimate?

A

Estimate of the % ejected during systole

21
Q

What is the calculation for EF?

A

EDV-ESV/EDV x 100
OR
SV/EDV x 100

22
Q

What is the normal range for EF?

A

50-75%

most commonly visually estimated

23
Q

Using the Simpson’s Method of Disks, what and when are the 2-D traces taken?

A

Apical 2 and Apical 4 chamber taken at end-diastole and end-systole

24
Q

About how many equally spaced disks are there usually?

A

Around 20

25
Q

What information is yielded from Simpson’s Method of Disk?

A

EDV, ESV, SV, CO,CI, and EF

26
Q

What is the total weight of the myocardium?

A

LV mass

27
Q

When acquiring LV mass, in the PSAX what planimetry is taken and when?

A

Epicardial and Endocardial Border

End-Diastole

LV Function and Ischemic Heart Disease (2 decks)

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