Left ventricular ejection and the Heather Index measured by non-invasive methods during postural changes in man.

Abstract:

:Differences have been found, which are usually 1% or less, between the left ventricular ejection time measured from the external carotid pulse tracing, and from the rate of change of thoracic impedance (dZ/dt) waveform, using either the second heart sound or the X-point of the dZ/dt tracing as the end-point. The Heather Index obtained from the ECG and dZ/dt tracings has been correlated with other indices of cardiac performance. The changes observed in the physiological variables during head-up and head-down tilting were in the expected directions.

authors

Hill DW,Merrifield AJ

doi

10.1111/j.1399-6576.1976.tb05044.x

subject

Has Abstract

pub_date

1976-01-01 00:00:00

pages

313-20

issue

4

eissn

0001-5172

issn

1399-6576

journal_volume

20

pub_type

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