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Echocardiographic Analysis of Cardiac Function After Infarction in Mice : Validation of Single-Plane Long-Axis View Measurements and the Bi-Plane Simpson Method

Andre Heinen, Annika Raupach, Friederike Behmenburg, Nina Hölscher, Ulrich Flögel, Malte Kelm, Wolfgang Kaisers, Rianne Nederlof, Ragnar Huhn, Axel Gödecke
Ultrasound in Medicine & Biology2018
Although echocardiography is commonly used to analyze cardiac function in small animal models of cardiac remodeling after myocardial infarction, the different echocardiographic methods are validated poorly. End-diastolic volume, end-systolic volume and ejection fraction were analyzed using either standard single-plane analysis from parasternal long-axis B-mode views (PSLAX) or the bi-plane Simpson method (using PSLAX and three short-axis views) and validated using magnetic resonance imaging as standard. Ejection fraction measured by PSLAX was moderately correlated with a coefficient of R2 = 0.49. The standard deviation of residuals was 9.91. Simpson analysis revealed an improved correlation coefficient of R2 = 0.77 and a reduction in standard deviation of residuals by 45% (5.45 vs. 9.92, p = 0.014). Subgroup analysis revealed that the high variation in PSLAX is due to changes in ventricular geometry after myocardial infarction. Our results indicate that the bi-plane Simpson method is advantageous for the assessment of cardiac function after myocardial infarction.
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