Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
Mohr, G; Hofer, E; Plank, G.
A new real-time mapping system to detect microscopic cardiac excitation patterns.
Biomed Instrum Technol. 1999; 33(5): 455-461.
PubMed
- Co-Autor*innen der Med Uni Graz
- Hofer Ernst
- Plank Gernot
- Altmetrics:
- Dimensions Citations:
- Plum Analytics:
- Abstract:
- A new fast, high-resolution measurement system has been developed to analyze the propagation of cardiac excitation on a microscopic scale. The instrument uses a microsensor array to detect microscopic excitation patterns at the cardiac surface. Ninety-six epicardial signals are recorded simultaneously with 14-bit resolution at 200-kHz samples per second per channel. The system operates like a digital oscilloscope. Preprocessing routines (offset, gain, and triggering) are executed within a sampling interval of 5 microseconds by 48 digital signal processors. Analog-to-digital (A/D) converters are provided with 12 Mb of buffer memory, allowing continuous recording of up to 64-k samples x 96 channels. The recorded dataset is transferred rapidly (8 Mb/sec) to the memory of the integrated computer system via VXIbus. Analysis and visualization of the propagating excitation are computed by custom-designed software. The performance of the system allows recording as well as visualization of the cardiac excitation spread in a beat-to-beat manner.
- Find related publications in this database (using NLM MeSH Indexing)
- Analog-Digital Conversion -
- Animals -
- Body Surface Potential Mapping - instrumentation
- Electric Conductivity - instrumentation
- Electrodes, Implanted - instrumentation
- Equipment Design - instrumentation
- Guinea Pigs - instrumentation
- Heart Conduction System - physiology
- Papillary Muscles - physiology
- Research Support, Non-U.S. Gov't - physiology
- Signal Processing, Computer-Assisted - physiology
- Surface Properties - physiology