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Interobserver repeatability of interventricular septal wall measurements in cats
1Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario, N1G 2W1, Canada; Department of Clinical Studies, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario, N1G 2W1, Canada.
Interobserver variability in measuring feline interventricular septum thickness via echocardiography was poor to moderate. This impacts interpreting cardiac measurements between different veterinary specialists.
Area of Science:
- Veterinary Cardiology
- Diagnostic Imaging
Background:
- Echocardiography is the gold standard for diagnosing feline hypertrophic cardiomyopathy.
- Previous studies reported low interobserver variability in echocardiographic measurements.
Purpose of the Study:
- To test the hypothesis that interobserver variability is high when measuring interventricular septum (IVS) thickness in cats.
Main Methods:
- 29 veterinary cardiologists measured IVS thickness from echocardiographic images of 4 cats.
- Measurements were taken from right-sided parasternal left ventricular outflow tract views.
- Intraclass correlation coefficient (ICC) was used for analysis.
Main Results:
- Poor interobserver repeatability was found for the IVS base (ICC: 0.4).
- Moderate repeatability was found for the rest of the IVS (ICC: 0.6).
- Observer and training location contributed to measurement variance.
Conclusions:
- Interobserver repeatability for feline IVS measurements is poor to moderate.
- Findings are critical for comparing echocardiographic interpretations between observers.
- Training location may influence variability in multi-institutional studies.
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