Heart failure which is reduced contraction of the ventricular myocardio is one result of the serious heart disease. The condition of heart failure patients depend chiefly on the level of impaired functioning in the right and left ventricle of the heart, the cause of the disease, and the presence of arrhythmia. Only a doctor with considerable experience can accurately diagnose heart failure.
This paper describes a diagnostic system of classification employing a circulatory model. The system employs a simple exercise and a circulatory model that is based on information about partial pressure of carbon dioxide in the arteries during exercise.
When a patient suffers from heart failure contraction of the ventricular myocardio declines, stroke volume depends chiefly on the heart rate. Exercise remarkably changes stroke volume in a patient with heart failure. Stroke volume is simulated using the circulatory model, which is composed of parameters such as heart rate, mean blood pressure, and partial pressure of carbon dioxide in the artery during exercise.
The measured results of stroke volume during exercise using the ultrasonic quantitative blood flow measurement system coincides with the simulated results of stroke volume with the use of the circulatory model. While the ultrasonic quantitative blood flow measurement system is expensive, the diagnostic system proposed in this paper can be realized economically with conventional 16-bit microcomputers.
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