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ARDMS AE-Adult-Echocardiography Exam - Topic 4 Question 1 Discussion

Which method is appropriate for measuring the left atrial diameter in parasternal long axis?
A) Inner edge to inner edge, perpendicular to the aortic root, at end-diastole
B) Inner edge to inner edge, parallel to the aortic root, at end-diastole
C) Inner edge to inner edge, perpendicular to the aortic root, at end-systole
D) Outer edge to outer edge, perpendicular to the aortic root, at end-systole

ARDMS AE-Adult-Echocardiography Exam - Topic 4 Question 1 Discussion

Actual exam question for ARDMS's AE-Adult-Echocardiography exam
Question #: 1
Topic #: 4
[All AE-Adult-Echocardiography Questions]

Which method is appropriate for measuring the left atrial diameter in parasternal long axis?

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Suggested Answer: A

Comprehensive and Detailed Explanation From Exact Extract:

The recommended method to measure left atrial diameter in the parasternal long axis view is the inner edge to inner edge technique, perpendicular to the aortic root, measured at end-diastole. This approach provides the most reproducible and standardized measurement.

Measurement parallel to the aortic root or at end-systole is less accurate. Outer edge measurements overestimate size.

ASE chamber quantification guidelines specify this method for standardization and reproducibility in adult echocardiography practice12:ASE Chamber Quantification Guidelinesp.90-9516:Textbook of Clinical Echocardiography, 6ep.120-125.


by Eleonore at Nov 25, 2025, 08:52 AM

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Carolann
3 months ago
D is not right; it’s outer edge, which isn’t standard.
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Brinda
3 months ago
C could be a trick option, but A is safer.
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Jaleesa
3 months ago
I feel A is definitely the right answer. It’s what we learned.
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Lettie
3 months ago
I agree, A is clear and precise.
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Hector
4 months ago
I think A is the best choice. It’s standard practice.
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Kasandra
4 months ago
Definitely A, that’s standard practice!
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Sonia
4 months ago
I thought it could be at end-systole too?
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Graciela
5 months ago
Wait, is it really always at end-diastole?
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Della
5 months ago
Totally agree, it’s all about that end-diastole measurement.
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Gladys
5 months ago
A) is the correct method!
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Teresita
5 months ago
Measuring the left atrial diameter is like trying to measure the size of a black hole - it's always expanding and contracting!
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Yolande
5 months ago
D) Outer edge to outer edge, perpendicular to the aortic root, at end-systole. Measuring the outer edges gives a more comprehensive assessment of the left atrial size.
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Gerald
5 months ago
B) Inner edge to inner edge, parallel to the aortic root, at end-diastole. Measuring parallel to the aortic root is more intuitive and easier to perform.
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Stephaine
6 months ago
C) Inner edge to inner edge, perpendicular to the aortic root, at end-systole. Measuring at end-systole gives a more accurate representation of the left atrial size.
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Sherell
6 months ago
A) Inner edge to inner edge, perpendicular to the aortic root, at end-diastole. This is the standard method for measuring left atrial diameter.
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Dean
6 months ago
I remember discussing the inner edge to inner edge method, but I can't remember if it was at end-diastole or end-systole. This is tricky!
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Jennifer
6 months ago
I’m leaning towards B, but I can't recall if it should be parallel or perpendicular. I need to double-check my notes!
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Odette
6 months ago
I practiced a similar question, and I feel like the measurement should be perpendicular to the aortic root. Maybe it's A or C?
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Reta
6 months ago
I'm pretty confident it's B. That's the technique we covered in class, and it makes the most sense anatomically.
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Mattie
7 months ago
Ugh, I'm so confused. I thought it was outer edge to outer edge, but now I'm second-guessing myself. I better review the material again.
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Yaeko
7 months ago
I think it's A, but I'm not completely sure. I remember something about measuring at end-diastole being important.
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Kirk
7 months ago
Okay, I've got this. It's A - inner edge to inner edge, perpendicular to the aortic root, at end-diastole. That's the standard method, right?
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Leota
7 months ago
B seems reasonable too, but A is more widely accepted.
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Eileen
8 months ago
Hmm, I'm not sure. I'll have to think this through carefully. Maybe C or D would be better?
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Ethan
8 months ago
I think it's B. Measuring parallel to the aortic root at end-diastole seems like the most logical approach.
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Pete
2 months ago
I’m leaning towards A, but B is definitely a strong contender.
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Sang
2 months ago
D seems less common, but could be useful in some cases.
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Jerlene
3 months ago
I thought A was the standard method.
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Tien
3 months ago
I agree with you, B makes sense!
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Barrett
7 months ago
C is also a valid option, isn't it?
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