Effect of pulmonary circulation on vector impedance cardiogram

Pedhnekar, S. A. ; Jindal, G. D. ; Nerurkar, S. N. ; Dharani, J. B. ; Deshpande, A. K. ; Parulkar, G. B. (1990) Effect of pulmonary circulation on vector impedance cardiogram Journal of Postgraduate Medicine, 36 (4). pp. 213-218. ISSN 0022-3859

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Vector impedance cardiograms in horizontal lead configuration [VICG(H)] were recorded in 34 normal subjects, 18 patients with mitral stenosis, 9 patients with mitral regurgitation, 14 patients with aortic regurgitation and 13 patients with non-cyanotic septal disorders. Data in normal subjects revealed that most of the phase reversal points in VICG(H) waveform did not coincide with those of conventional impedance cardiogram. The shape of VICG(H) waveform and values of VICG indices were observed to be markedly affected in patients having significant alteration in the pulmonary circulation and the changes observed were specific of the type of the disorder. The results of the study suggested that right side of the heart had dominant contribution in generation of VICG(H) waveform.

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