CompuServe Messages

> […] and do, among other things, radiofrequency catheter > ablation of bypass tracts and reentry circuits. Dry ice was used for the ablation itself, but the localization was more critical. 'CardioMap II' is a computerized cardiac mappping system which, given a sock-like electrode mesh tucked around the heart, can pinpoint the location of re-entries. I remember that there was an optimization in the software somewhere which could detect Wolff-Parkinson-White syndrome sources very accurately. Last I've heard of, they were trying an inflatable catheter which contains electrodes on the surface for intra-ventricular electrocardiographic mapping. I don't know the state of the project right now, but it ran on a microVax back them. There was also an offline analysis package which ran on Silicon Graphics workstations for 3D real-time playback and propagation analysis. The research team is composed of R Gulrajani, P Savard and FA Roberge. One of their article is in CRC Crit Rev Biomed Eng, 16:171-214, 1988. Another good article is: Lorange, M. et al, "Computerized Construction of a Heart Model Using a CT Scan", Proc. of the 14th Canadian Med & Biol Eng Soc, Montreal, p.87, 1988. An oldie, but a goodie is Huijsmans, DP, "Toward Computerized Morphometric Facilities: A Review of 58 Software Packages for Computer-Aided Three-Dimensional Reconstruction, Quantification and Picture Generation From Parallel Serial Sections", Anatomical Records, 216:449-470, 1986. > […] but I though it would be useful to use a 3-D image of the > heart which can be rotated in any plane. I don't know how you can get below an SGI machine. There is simply not enough 3D graphics power in off-the-shelf PCs and Macs for that kind of computing. Hope that helps. -cb