Estimation of coronary blood flow by cardiac thermography in open chest conditions

N. Gordon, S. Rispler, S. Sideman, R. Shofti, R. Beyar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We developed a thermographical method for quantitative estimation of coronary flow, by analyzing the dynamic response of the epicardial temperature to cold saline injection into the aortic root. In eight dogs, the heart was exposed and imaged by a thermographic camera. LAD flow was measured by a transit time flowmeter. End diastolic images were recorded for 20-30 sec after aortic root injection of 20cc of cold saline. Several LAD flow rates were achieved by one minute occlusion of the LAD, obtaining a reactive hyperemic response. A temperature response curve was obtained by averaging over an edge detected arterial segment for each frame. Several indices were calculated for each curve and correlated with coronary flow, one of which was a parameter of a heat transfer model, that was successfully fit to the curve. In conclusion, we developed a method for quantitative estimation of coronary blood flow by thermography, which can provide important information regarding coronary blood flow during open chest procedures.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE Convention of Electrical & Electronics Engineers in Israel
Editors Anon
PublisherIEEE
Pages234-238
Number of pages5
StatePublished - 1996
Externally publishedYes
EventProceedings of the 1996 19th Convention of Electrical and Electronics Engineers in Israel - Jerusalem, Isr
Duration: Nov 5 1996Nov 6 1996

Other

OtherProceedings of the 1996 19th Convention of Electrical and Electronics Engineers in Israel
CityJerusalem, Isr
Period11/5/9611/6/96

ASJC Scopus subject areas

  • Engineering(all)

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