Title :
Beat-by-beat monitoring of systemic vascular resistance during head-up tilt for assessment of orthostatic stress response
Author :
Kizakevich, Paul N. ; Kaufman, Evan ; Cragg, Noel ; Jochem, Warren J. ; Teague, Steve M. ; Hordinsky, Jeny R.
Author_Institution :
Res. Triangle Inst., Research Triangle Park, NC, USA
Abstract :
A method is described for noninvasive cardiovascular evaluation of vasovagal syncope. Continuous electrocardiogram, impedance cardiogram, and finger-cuff blood pressure recordings are acquired and analyzed on a beat-by-beat basis for calculation of heart rate, cardiac contractility, cardiac output, mean arterial pressure, and systemic vascular resistance. In a patient with near-syncopal head-upright tilt response, a 200% increase in cardiac contractility 20% decrease in mean arterial pressure, and 66% reduction in systemic vascular resistance was demonstrated. Comprehensive cardiovascular assessment of orthostatic stress response may improve diagnosis and understanding of vasovagal syncope
Keywords :
biomedical measurement; blood; cardiology; electrocardiography; flow measurement; haemodynamics; medical signal processing; patient diagnosis; pressure measurement; beat-by-beat monitoring; cardiac contractility; cardiac output; continuous electrocardiogram; diagnosis; electrodes; finger-cuff blood pressure recordings; head-up tilt; heart rate; impedance cardiogram; mean arterial pressure; near-syncopal head-upright tilt response; noninvasive cardiovascular evaluation; orthostatic stress response; signal processing; systemic vascular resistance; vasovagal syncope; Biomedical monitoring; Blood pressure; Cardiology; Heart rate; Immune system; Impedance; Signal processing; Stress; Testing; Thorax;
Conference_Titel :
Computer-Based Medical Systems, 1994., Proceedings 1994 IEEE Seventh Symposium on
Conference_Location :
Winston-Salem, NC
Print_ISBN :
0-8186-6256-5
DOI :
10.1109/CBMS.1994.315992
