ANALYSIS OF CEREBRAL ECHO-PULSATION CURVES AND PLETHYSMOGRAMS IN CASES OF CARDIAC ARRHYTHMIA
1977
Abstract Cerebral echo-pulsations in 18 patients with atrial fibrillation of the heart were compared with finger and toe plethysmograms. A normalization technique was used to equalize curves recorded with different kinds of measurements. The average linear correlation coefficient between echo-pulsation and plethysmographic curves was 0.72 and indicates that a relationship exists between the RR-interval of the E.C.G. and the amplitude of echo movements in range and plethysmographic excursions.
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