めまい患者に行なったimpedance cardiographyの成績

概要

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Impedance cardiography, a relatively simple non-invasive method of measuring blood flow, was studied in 18 normal subjects, 33 typical Menieres, tisease, 10 atypical Menieres disease and 16 disturbance of cerebral circulation, and the change of cardiac output and cervical bloodflow as the factor to estimate cerebral blood flow due to the change of body posture(supine-standing-standing 10 minutes-supine) was measured. In normal subjects at supine position the cardiac output was 121 ml/beat, 7.5 1/min.and cervical blood flow was 1.4 ml/beat, 87 ml/min.At standing position, cardiac output decreased by about 30% and cervical blood flow increased by 20_??_40%.The ratio of cervical blood flow against cardiac output was named cerebral distribution ratio.It increased by about 70% at standing position. Those having no vertigo indicated roughly the same cnange of this ratio with normal standing position. Those having no vertigo indicated roughly the same cnange of this ratio with normal subjects at the time of posture change.Whereas the patients with Menieres disease having vertigo indicated about 100% of increase at standing position.Practically no change was noticed in those with disturbance of cerebral circulation having vertigo. This difference may help us to differentiate disturbance of cerebral circulation from Menieres disease.
社団法人日本耳鼻咽喉科学会の論文