What does this research mean for the field?

The use of a newly designed orthogonal reference frame instrument to standardize the spatial orientation of the ultrasonic beam significantly improves the reproducibility and reliability of echocardiographic estimates of left ventricular dimensions compared to standard methods. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine whether a custom orthogonal reference frame that standardizes ultrasonic beam orientation improves the reproducibility of echocardiographic left ventricular dimensions.

April 1, 1977HeartOpen Access

Reproducibility of echocardiographic estimates of left ventricular dimensions.

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Why the study?

Does an orthogonal reference frame instrument improve the reproducibility of echocardiographic left ventricular dimensions compared to the standard method?

Population

37 subjects with or without heart disease (Group I: n=23; Group II: n=14)

Comparison

Echocardiography using a newly designed… vs Standard echocardiography using the mitral valve…

Design

Cohort

Follow-up

8 hours to 49 days

Authors

MSMiltiadis A. StefadourosKing Faisal Specialist Hospital & Research Centre MCMario I. CanedoTampa General Hospital

Discussion

Member takes

Implication

May enhance LV dimension reproducibility in echocardiography; leaves open need for randomized validation before practice change.

Key Points

To determine whether a custom orthogonal reference frame that standardizes ultrasonic beam orientation improves the reproducibility of echocardiographic left ventricular dimensions.
Tested an orthogonal reference frame in 23 subjects (Group I) to fix ultrasound beam entry and orientation, repeating measurements 8 hours to 49 days later with same and independent observers.
Evaluated a control cohort of 14 subjects (Group II) using standard internal landmarking without the alignment instrument, repeated within 8 hours to 11 days.
Calculated left ventricular end-diastolic dimension (Dd), end-systolic dimension (Ds), and fractional shortening difference (delta D) averaged over 2 to 6 cardiac cycles.
Group I measurements exhibited minor, statistically insignificant variations between sessions, never exceeding 3 to 5 mm for Dd or Ds, and 4 mm for delta D.
Group II measurements displayed significantly wider scatter, with individual test-retest differences reaching up to 11 mm for Dd, 9 mm for Ds, and 9 mm for delta D.

Structured PICO

Does an orthogonal reference frame instrument improve the reproducibility of echocardiographic left ventricular dimensions compared to the standard method?

Population

37 subjects with or without heart disease (Group I: n=23; Group II: n=14)

Intervention

Echocardiography using a newly designed instrument representing an orthogonal reference frame to determine and reproduce the spatial orientation of the ultrasonic beam

Comparator

Standard echocardiography using the mitral valve as an internal landmark without the instrument

Outcome

Reproducibility of left ventricular end-diastolic dimension (Dd), end-systolic dimension (Ds), and their difference (delta D) between repeated studiessurrogate

The use of an orthogonal reference frame instrument significantly improves the reproducibility of echocardiographic left ventricular dimensions compared to standard landmark-based methods.

Cite This Study

Stefadouros et al. (1977) studied this question.

synapsesocial.com/papers/6a12e6ec5bb7edc7189e71b5 https://doi.org/10.1136/hrt.39.4.390

Topics

Echocardiography

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Reproducibility of echocardiographic estimates of left ventricular dimensions.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Reproducibility of echocardiographic estimates of left ventricular dimensions.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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