Why the study?
Can the log-log relationship between apexcardiogram A wave height and echocardiographic LV diameter non-invasively indicate ventricular stiffness in cardiac patients compared to normal subjects?
Observational
No
Can the log-log relationship between apexcardiogram A wave height and echocardiographic LV diameter non-invasively indicate ventricular stiffness in cardiac patients compared to normal subjects?
Answers are grounded in this paper and cite their sources.
A non-invasive method combining apexcardiography and echocardiography may be useful for assessing left ventricular stiffness in cardiac patients.
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Fukumoto et al. (1979) conducted an observational in Cardiac disease (aortic regurgitation, mitral regurgitation, aortic stenosis, cardiomyopathy). Cardiac disease (volume or pressure overload) vs. Normal subjects was evaluated on Log-log slope of the relationship between apexcardiogram A wave amplitude and echocardiographic minor axis dimension during atrial systole (p=<0.001).
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