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METHOD FOR CREATING AND ANALYZING GRAPHS OF CARDIAC FUNCTION IN ATRIAL FIBRILLATION AND SINUS ARRHYTHMIA BASED ON THORACIC IMPEDANCE MEASUREMENTS
METHOD FOR CREATING AND ANALYZING GRAPHS OF CARDIAC FUNCTION IN ATRIAL FIBRILLATION AND SINUS ARRHYTHMIA BASED ON THORACIC IMPEDANCE MEASUREMENTS
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机译：胸阻抗测量的心房纤颤和窦性心律失常心功能图的建立和分析方法
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摘要
The present invention provides a method for creating and pathophysiologically analyzing graphs of cardiac function in atrial fibrillation and sinus arrhythmia by using thoracic impedance measurements. A two-dimensional scatter plot is created by applying (dZ/dt)min values corresponding to preceding RR interval (RR1) values and an approximate curve (i.e., cardiac function curve) is fitted to dots on the plot. The distribution pattern of the dots and the slope of the approximate curve allow for readily and visually evaluating cardiac function. Furthermore, a graph of the relationship between (dZ/dt)min values and RR1/pre-preceding RR interval (RR2) ratio values makes it possible to analyze pathophysiological mechanisms of cardiac function in more detail. This novel method of the present invention can be easily and repeatedly performed in atrial fibrillation and sinus arrhythmia with less of a physical burden on the patient, thereby being able to provide a very useful information for diagnosis and treatment.
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