Papers Published

1. Witkowski, F.X. and Penkoske, P.A. and Plonsey, R. and Kavanagh, K.M. and Giles, W.R. and Spano, M.L. and Ditto, W.L., A novel mapping storage architecture enabling tens of thousands of channels on a personal computer platform, Proceedings of the 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. `Bridging Disciplines for Biomedicine' (Cat. No.96CH36036), vol. vol.5 (1997), pp. 1885 - 6 [IEMBS.1996.646303] .
   (last updated on 2007/04/16)

   Abstract:
   The electrophysiological mechanisms underlying cardiac arrhythmias are studied by determining the spatiotemporal progression of cardiac depolarization and repolarization, termed cardiac mapping. Analysis of transient events requires information to be obtained from multiple sites simultaneously. The most significant problem with the design of such systems has been the large amount of data storage required and the rapidity of the composite data stream. Mapping systems with 500 simultaneous channels are common, and 4,000 channel systems have been envisioned. The authors report a relatively simple approach to this data storage problem that uses commercially available frame grabber technology coupled to a personal computer. With this approach they have developed a storage system capable of 24,000 channels sampled at 1 kHz with 12 bit resolution. Hybrid mapping systems incorporating optical recording systems utilizing voltage sensitive dyes from devices such as CCD cameras as well as conventional extracellular electrograms can simultaneously utilize this approach

   Keywords:
   bioelectric potentials;biological techniques;biology computing;cardiology;memory architecture;microcomputer applications;