Evaluation of signal-averaged cardiokymography for the detection of ischaemic left ventricular dysfunction

International Journal of Cardiology
A W ScherhagD L Heene

Abstract

Cardiokymography (CKG) is a non-invasive method for the detection of patients with coronary artery disease (CAD). Issues of the present study were to evaluate the feasibility, sensitivity and specificity of a recently developed signal-averaged CKG system for detecting patients with pharmacologically induced ischaemic left ventricular wall motion abnormalities (WMA) during pharmacologic stress echocardiography (SE). Precordial CKG curves were recorded in 100 consecutive patients who underwent dobutamine-SE for suspected CAD. For interpretation, CKG curves were classified into three different types, depending on the degree of systolic outward motion. CKG test results were regarded as positive (indicating myocardial ischaemia) if there was a change of the baseline CKG type at peak pharmacologic stress. The CKG test results were positive in 18 of 27 patients with a pathologic dobutamine-SE (sensitivity 67%), but did not show any change of the prior CKG type in 57 of 69 patients with a normal SE (specificity 83%). Patients with a true positive CKG test had significantly (P<0.05) more echocardiographic segments with WMA than patients with a false negative CKG test. Signal-averaged CKG can detect patients with ischaemic ventricular dy...Continue Reading

References

Jun 1, 1979·American Heart Journal·M H CrawfordJ Detwiler
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Citations

Sep 28, 2017·Bioengineering·Amirtaha Taebi, Hansen A Mansy
Mar 1, 2019·Vibration·Amirtahà TaebiHansen A Mansy

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