A hybrid approach for quantifying aortic valve stenosis using impedance cardiography and echocardiography

BMC Cardiovascular Disorders
Yunis DaralammouriBernward Lauer

Abstract

Impedance cardiography (IC) is a noninvasive modality that utilizes changes in impedance across the thorax to assess hemodynamic parameters, including stroke volume (SV). This study compared aortic valve area (AVA) as assessed by a hybrid approach of transthoracic echocardiography (TTE) and impedance cardiography (IC) to AVA determined at cardiac catheterization using the Gorlin equation. A total of 30 patients with moderate to severe aortic stenosis underwent AVA measurement using two different approaches: using the continuity equation (CE) in a hybrid method combining IC and TTE (AVA = stroke by volume impedance cardiography/trans-aortic-VTI) and using the Gorlin equation. Patient age ranged from 37 to 82 years (mean 48); there were 21 men and 9 women. Twenty-five patients were in sinus rhythm, and five had atrial fibrillation. There was no statistically significant difference for the mean AVA between the two methods (0.7 ± 0.24 cm(2) using the Gorlin equation versus 0.7 ± 0.23 cm(2) using the hybrid approach, p = 0.17; r = 0.76, p < 0.001). The mean difference was 0.004 cm(2), and the limits of agreement were -0.33 to 0.37. The hybrid method using impedance cardiography and TTE is a reasonable, clinically applicable approach...Continue Reading

References

Jan 1, 1988·Journal of the American College of Cardiology·V D GoliU Thadani
Mar 1, 1986·Journal of the American College of Cardiology·C M OttoL L Huntsman
Apr 1, 1986·Journal of the American College of Cardiology·P J CurrieA J Tajik
Jul 1, 1993·Pacing and Clinical Electrophysiology : PACE·I Ovsyshcher, S Furman
Aug 1, 1993·Journal of the American College of Cardiology·R HoffmannP Hanrath
Aug 22, 2000·Current Opinion in Cardiology·P Rosenberg, C W Yancy
Feb 12, 2002·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·Miguel A QuiñonesUNKNOWN Doppler Quantification Task Force of the Nomenclature and Standards Committee of the American Society of Echocardiography
Jun 5, 2003·Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine·Richard L SummersThomas G Coleman
Aug 9, 2003·Journal of the American College of Cardiology·Anna S JohnChristian W Hamm
Feb 14, 2004·Zeitschrift für Kardiologie·J J KadenM Borggrefe
Sep 19, 2006·Lancet·Vuyisile T NkomoMaurice Enriquez-Sarano
Jan 10, 2009·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·Helmut BaumgartnerUNKNOWN European Association of Echocardiography

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