C3: Normal Measurments..... Flashcards

(33 cards)

1
Q

Which measurements do we do in End diastole

A
IVS
LVIDd
LVPW (L ventricles posterior wall)
AO sinus
Ascending AO
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2
Q

What measurements in end systole?

A

LVOT (mid systole)
LVIDs
LA

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3
Q

Where should all the LV measurements be taken?

A

At the basal level segments inferior to the MV leaflet tips

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4
Q

What’s the norm measurement for the IVS and the LVPW?

How different can these 2 measurements be

A

M: 6-10 mm, <11mm
W: 6-9mm, <10mm

Within 1mm of each other

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5
Q

What is the norm measurement for the LVIDd for men and women?

A

Men: < 59 mm
Women: <53 mm

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6
Q

What are the norm measurements for AO sinus and Ascending

A

Ascending:
Men: <34 mm
W: <31 mm

AO sinus:
M: <37mm
W: <33mm

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7
Q

What’s severe sinus or ascending AO Dilation?

A

> /= 50mm

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8
Q

What are the measurements of the LVOT? the avg measurement of LVOT?

A

18-22mm

Avg is 20mm

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9
Q

Norm measurement for LVIDs in systole?

A

20-38mm

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10
Q

Norm measurement for LA in systole?

Where would you put the calipers?

A

M: <40mm
W: <38 mm

Inner to inner

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11
Q

What is the norm fractional shortening value?

A

> 25%

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12
Q

Norm valve for ejection fraction?

A

> or = 55%

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13
Q

What’s the normal LV mass index for M and W?

A

M: < 115 g/m2
W: <95 g/m2

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14
Q

Formula for relative wall thickness?

A

2x(LVPW/LVIDd)

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15
Q

How should the sound beam be hitting the structures that you want to measure?

A

As perpendicular as possible

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16
Q

When measuring is it better to have more axial resolution of lateral resolution?

A

More axial will improve accuracy because your crossing fewer scan lines (this is why we need to be perpendicular)

17
Q

What’s another name for the LVIDd?

A

LV minor axis

18
Q

Norm values for AO annulus for M and W?

A

M: <29mm
W: <25mm

19
Q

How can you find end systole on the ECG wave

A

End of the T wave

20
Q

Where do you put the calipers for LVIDs?

A

Inner to inner

21
Q

What is another term for linear ejection fraction?

A

Teicholz Linear EF

22
Q

What’s the formula for fractional shortening ? And what information does it give us?

A

FS= (LVIDd-LVIDs/LVIDd)x100

Gives information about the systolic function of the heart

23
Q

For FS, is a smaller or larger value (compared to norm) more of less worrisome?

A

Smaller value

24
Q

What’s the function of the EF?

What assumptions does the EF make?

A

Takes dimensions and extrapolates a volume from that information

Assumes the LV is an ellipse shape
There’s symmetrical contractility
The LV length is twice as long as the width

25
Formula for EF How do you calculate the EF with the LVIDd & LVIDs?
((EDV-ESV)/EDV)x100 Cube the LVIDd and LVIDs ``` LVIDd^3= EDV LVIDs^3= ESV ```
26
How do you find the myocardial volume? | Formula for LV mass
Epicardial V-endocardial V LV mass= Volume of LV walls x myocardial density
27
What is the LVMI
Indexes the LV mass to BSA
28
What does the RWT compare?
The thickness of the LVPW to the LV chamber size
29
Basic principle of the RWT
Bigger chamber = thicker walls
30
Norm range for RWT
< or = 0.42
31
What is the norm value for MPAP?
9-18mmHg
32
Where do you place the calipers when measuring the AO sinus and ascending AO
Leading to leading (outer wall to inner wall)
33
Review LV Mass and RWT chart!
In C3: Parasternal LAX and Measurements