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Impedance plethysmography of thoracic region: impedance cardiography.
J Postgrad Med ; 1990 Oct; 36(4): 207-12
Article in English | IMSEAR | ID: sea-117592
ABSTRACT
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.
Subject(s)
Full text: Available Index: IMSEAR (South-East Asia) Main subject: Phonocardiography / Female / Humans / Male / Cardiography, Impedance / Sensitivity and Specificity / Electrocardiography / Evaluation Studies as Topic / Heart Diseases / Hemodynamics Type of study: Diagnostic study / Evaluation studies Language: English Journal: J Postgrad Med Year: 1990 Type: Article

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Full text: Available Index: IMSEAR (South-East Asia) Main subject: Phonocardiography / Female / Humans / Male / Cardiography, Impedance / Sensitivity and Specificity / Electrocardiography / Evaluation Studies as Topic / Heart Diseases / Hemodynamics Type of study: Diagnostic study / Evaluation studies Language: English Journal: J Postgrad Med Year: 1990 Type: Article