Journal of Postgraduate Medicine
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 ORIGINAL ARTICLE
Year : 1990  |  Volume : 36  |  Issue : 4  |  Page : 207-12

Impedance plethysmography of thoracic region: impedance cardiography.


Department of Medicine, Grant Medical College, Bombay, India., India

Correspondence Address:
A K Deshpande
Department of Medicine, Grant Medical College, Bombay, India.
India
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Source of Support: None, Conflict of Interest: None


PMID: 0002132246

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Impedance plethysmograms were recorded from thoracic region in 254 normal subjects, 183 patients with coronary artery disease, 391 patients with valvular heart disease and 107 patients with congenital septal disorder. The data in 18 normal subjects and 55 patients showed that basal impedance decreases markedly during exercise in patients with ischaemic heart disease. Estimation of cardiac index by this technique in a group of 99 normal subjects has been observed to be more consistent than that of the stroke volume. Estimation of systolic time index from impedance plethysmograms in 34 normal subjects has been shown to be as reliable as that from electrocardiogram, phonocardiogram and carotid pulse tracing. Changes in the shape of plethysmographic waveform produced by valvular and congenital heart diseases are briefly described and the role of this technique in screening cardiac patients has been highlighted.






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Online since 12th February '04
2004 - Journal of Postgraduate Medicine
Official Publication of the Staff Society of the Seth GS Medical College and KEM Hospital, Mumbai, India
Published by Wolters Kluwer - Medknow