Deshpande A K, Jindal G D, Jagasia P M, Murali K V, Bharadwaj P A, Tahilkar K I, Parulkar G B
Department of Medicine, Grant Medical College, Bombay, India.
J Postgrad Med. 1990 Oct;36(4):207-12.
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.
对254名正常受试者、183名冠心病患者、391名瓣膜性心脏病患者和107名先天性间隔疾病患者记录了胸部区域的阻抗容积图。18名正常受试者和55名患者的数据表明，缺血性心脏病患者运动期间基础阻抗显著降低。在一组99名正常受试者中，通过该技术估计心脏指数比估计每搏量更具一致性。在34名正常受试者中，由阻抗容积图估计收缩期时间指数已证明与由心电图、心音图和颈动脉脉搏描记图估计的一样可靠。简要描述了瓣膜性和先天性心脏病产生的容积图波形形状变化，并强调了该技术在筛查心脏病患者中的作用。
