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

Content Provider	Springer Nature : BioMed Central
Author	Daralammouri, Yunis Ayoub, Khubaib Badrieh, Najwan Lauer, Bernward
Abstract	Background 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. Methods 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. Results There was no statistically significant difference for the mean AVA between the two methods (0.7 ± 0.24 cm2 using the Gorlin equation versus 0.7 ± 0.23 cm2 using the hybrid approach, p = 0.17; r = 0.76, p < 0.001). The mean difference was 0.004 cm2, and the limits of agreement were −0.33 to 0.37. Conclusion The hybrid method using impedance cardiography and TTE is a reasonable, clinically applicable approach to evaluate AVA and has significant correlation to invasive measurement using the Gorlin equation.
Related Links	https://bmccardiovascdisord.biomedcentral.com/counter/pdf/10.1186/s12872-015-0155-5.pdf
Ending Page	6
Page Count	6
Starting Page	1
File Format	HTM / HTML
ISSN	14712261
DOI	10.1186/s12872-015-0155-5
Journal	BMC Cardiovascular Disorders
Issue Number	1
Volume Number	16
Language	English
Publisher	BioMed Central
Publisher Date	2016-01-22
Access Restriction	Open
Subject Keyword	Cardiology Cardiac Surgery Angiology Blood Transfusion Medicine Internal Medicine Medicine Public Health Impedance cardiography Aortic stenosis Echocardiography Heart catheterization Hybrid approach Medicine/Public Health
Content Type	Text
Resource Type	Article
Subject	Cardiology and Cardiovascular Medicine
Journal Impact Factor	2/2023
5-Year Journal Impact Factor	2.3/2023

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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