PMID: 8449190Feb 1, 1993Paper

Impedance cardiography during exercise in patients with coronary heart disease

European Heart Journal
S H Thomas, A Crowther

Abstract

Impedance cardiography may be a simple way of assessing left ventricular performance during exercise. Measurements were therefore made during exercise testing in 102 consecutive male patients with suspected coronary disease prior to cardiac catheterization. These were subsequently divided into four groups: group A, normal; group B, 1- or 2-vessel disease; group C, 3-vessel disease (groups A, B, and C, left ventricular ejection fraction (LVEF) > 55%); and group D, 3-vessel disease with LVEF < 55%. Immediately after peak exercise several impedance measures were significantly correlated with resting LVEF, especially dZ/dtmax (R = 0.41, P < 0.001) and Heather index (R = 0.46, P < 0.001). Heather index was the best discriminator between the disease groups with mean values (95% confidence intervals) of 25.7 (22.2-29.2) (group A), 21.9 (20.6-23.2) (group B), 18.4 (16.2-20.6) (group C), and 15.3 (10.3-20.3) omega s-2 (group D) but there was considerable overlap between groups (risk ratios 1.17 and 3.15 for any and triple-vessel coronary disease respectively). Measurements were therefore of little diagnostic value. The majority of patients with abnormal responses could be identified more simply by their poor exercise tolerance or abnorm...Continue Reading

Citations

Apr 3, 2009·European Journal of Applied Physiology·Antonio CrisafulliAlberto Concu
Jun 10, 2004·The Tohoku Journal of Experimental Medicine·Takashi OnoTomoyuki Yambe
Dec 7, 2014·Best Practice & Research. Clinical Anaesthesiology·Djordje G JakovljevicGuy A MacGowan
May 1, 1995·Heart & Lung : the Journal of Critical Care·L JensenK K Teo
Mar 16, 2004·American Journal of Physiology. Heart and Circulatory Physiology·Antonio CrisafulliPasquale Pagliaro
Jan 12, 2007·Preventive Cardiology·Arthur P DeMarzo, James E Calvin
Feb 20, 2007·American Journal of Physiology. Heart and Circulatory Physiology·Antonio CrisafulliAlberto Concu
Apr 30, 2020·High Blood Pressure & Cardiovascular Prevention : the Official Journal of the Italian Society of Hypertension·Arthur P DeMarzo

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