An ECG synchronization circuit for real-time infrared imaging of epicardial coronary vessels

Author

Liu, Y.H. ; Nearing, B.D. ; Oesterle, S.N. ; Verrier, R.L.

Author_Institution

Dept. of Pharmacol., Georgetown Univ. Sch. of Med., Washington, DC, USA

fYear

1993

fDate

18-19 Mar 1993

Firstpage

15

Lastpage

16

Abstract

Trigger circuitry designed to synchronize a real-time infrared (IR) imager with the electrocardiogram (ECG) is presented. This synchronization (SYNC) circuit enables the IR imager to acquire a sequence of images at a fixed point in the cardiac cycle, a capability essential for measurement of epicardial coronary vessel diameter. The P wave was used as a trigger signal to test the performance of the SYNC circuit. However, other electrical signals, such as the R wave or aortic BP signals, can be chosen as trigger signals. As an extension to this circuit, a timer can be used to delay the output signal of the SYNC circuit to capture images a few milliseconds after the trigger signal

Keywords

biomedical electronics; cardiology; infrared imaging; synchronisation; trigger circuits; ECG synchronization circuit; P wave; cardiac cycle; circuit output signal delay; timer; trigger signal; vessel diameter measurement; Biomedical imaging; Cardiology; Circuit testing; Electrocardiography; Heart; Infrared imaging; Optical imaging; Pulse generation; Switches; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference, 1993., Proceedings of the 1993 IEEE Nineteenth Annual Northeast

Conference_Location

Newark, NJ

Print_ISBN

0-7803-0925-1

Type

conf

DOI

10.1109/NEBC.1993.404435

Filename

404435