Phase Shifting Prior to Spatial Filtering Enhances Optical Recordings of Cardiac Action Potential Propagation
نویسندگان
چکیده
منابع مشابه
Fluorescence imaging of cardiac propagation: spectral properties and filtering of optical action potentials.
Fluorescence imaging using voltage-sensitive dyes is an important tool for studying electrical propagation in the heart. Yet, the low amplitude of the voltage-sensitive component in the fluorescence signal and high acquisition rates dictated by the rapid propagation of the excitation wave front make it difficult to achieve recordings with high signal-to-noise ratios. Although spatially and temp...
متن کاملThe Different Mechanisms of Action Potential Propagation in the Heart
It was thought previously that cardiac muscle gap junctions provide low-resistance connections between cells and permit the local-circuit current to flow. Some evidences show that myocardial cells may not require low-resistance connections for successful propagation of the action potential (AP). It seems that some other types of mechanisms must be involved in AP propagation. In this article, we...
متن کاملThe Different Mechanisms of Action Potential Propagation in the Heart
It was thought previously that cardiac muscle gap junctions provide low-resistance connections between cells and permit the local-circuit current to flow. Some evidences show that myocardial cells may not require low-resistance connections for successful propagation of the action potential (AP). It seems that some other types of mechanisms must be involved in AP propagation. In this article, we...
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A theoretical model of action potential propagation in a thick strand of cardiac muscle is presented. The calculation takes into account the anisotropic and syncytial properties of the tissue, the presence of the interstitial space, the effect of the surrounding tissue bath, and the variation of the potential both along the strand length and across the strand cross section. The bidomain model i...
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A novel spatial phase-shifting method using moiré phenomena is presented. According to our analysis of moiré patterns on the base of scalar diffraction theory there is stable phase shift between fringe patterns of different order filtering. This phase shift is the stric value of and and just depend on the distance between two gratings and the period of gratings. In this spatial phase-sh...
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ژورنال
عنوان ژورنال: Annals of Biomedical Engineering
سال: 2001
ISSN: 0090-6964
DOI: 10.1114/1.1408927