Title :
Real time endocardiac volumetry
Author :
Mirescu, D. ; Savard, P.
Author_Institution :
Inst. de Genie Biomed., Montreal Univ., Que., Canada
fDate :
6/21/1905 12:00:00 AM
Abstract :
An algorithm for endocardiac volumetry using the same technical resources as for a non-fluoroscopic guiding system of an ablation catheter is presented. The authors´ method is based on the detection of a supplemental monopole or dipole position. It is added to the cardiac natural sources by injecting a low amplitude high frequency current source (and sink). An expanded super elastic basket electrode, containing 64 monopolar recording sites will give 64 coordinates of the endocardiac surface. Volume or blood flow can be further calculated and monitored. A least square method as well as an adequate signal filtering assure noise immunity and small error of the method. Simultaneous cardiac mapping, volumetry and catheter guiding can be done
Keywords :
blood flow measurement; electrocardiography; inverse problems; least mean squares methods; medical signal processing; patient monitoring; volume measurement; ablation catheter; cardiac mapping; catheter guiding; dipole position detection; least square method; low amplitude high frequency current source injection; monopolar recording sites; noise immunity; nonfluoroscopic guiding system; real time endocardiac volumetry; signal filtering; supplemental monopole position detection; Blood flow; Calculus; Catheters; Current measurement; Electrocardiography; Electrodes; Frequency; Heart; Least squares methods; Monitoring;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.802352
