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IEEE Engineering in Medicine and Biology Magazine

Issue 1 • Date Jan.-Feb. 1998

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Displaying Results 1 - 15 of 15
  • Analysis And Acquisition Of Multitchannel Data In Electrocardioloqy

    Publication Year: 1998, Page(s):32 - 33
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (571 KB)

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  • Characteristics of multichannel ECG recordings during human ventricular tachyarrhythmias

    Publication Year: 1998, Page(s):39 - 44
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1344 KB)

    Ventricular tachyarrhythmias are a leading cause of mortality. Although ventricular tachycardia (VT) is well understood, ventricular fibrillation (VF) remains an important clinical problem because fundamental information about the mechanisms of this arrhythmia in human hearts is still in short supply. While a number of therapeutic options are available for terminating or treating VT, the best hope... View full abstract»

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  • Compression of multichannel ECG through multichannel long-term prediction

    Publication Year: 1998, Page(s):109 - 115
    Cited by:  Papers (19)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1256 KB)

    The need for efficient coding of ECG signals is continually increasing with modern use of long-term monitoring and telemedicine. Here, the authors present an algorithm based on long-term prediction (LTP) compression. The single-channel LTP algorithm has been generalized to the multichannel case and is called the MC-LTP algorithm. This algorithm compresses PQRST beats using a pattern codebook with ... View full abstract»

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  • Modeling spontaneous minute volume in coronary artery bypass graft patients

    Publication Year: 1998, Page(s):122 - 127
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (703 KB)

    This article presents a mathematical method by which the future trajectory of patient spontaneous minute volume (SMV) may be predicted in the postoperative weaning period. The method outlined enables critical-care staff to predict the SMV trajectory up to 30 minutes into the future. Having this capability enables physicians, respiratory therapists, and nurses to more efficiently guide patient trea... View full abstract»

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  • The zero of potential

    Publication Year: 1998, Page(s):128 - 136
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1325 KB)

    The zero of potential has been the subject of controversy in both electrocardiographic and electroencephalographic literature. In this article zero of potential is discussed in a historical context. It is noted that there is no meaningful zero of potential on a bounded, insulated volume conductor such as the body, and the effect of the reference for recording potentials on surface potential maps i... View full abstract»

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  • Bioelectrical Impedance Techniques In Medicine [Book Reviews]

    Publication Year: 1998, Page(s): 141
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    Freely Available from IEEE
  • A system for in-vivo cardiac optical mapping

    Publication Year: 1998, Page(s):95 - 108
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1956 KB)

    Optical mapping of cardiac electrical activity is a valuable technique for studying arrhythmias, particularly the effects of defibrillation shocks. This technique has been exclusively applied to in-vitro preparations of hearts or tissues removed from an animal. But verification of experimental results and hypotheses is ideally performed in vivo on the heart as it remains in place in the animal. Ho... View full abstract»

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  • Optically imaging cardiac activation with a laser system

    Publication Year: 1998, Page(s):84 - 94
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2416 KB)

    The authors have developed a laser imaging system that: 1) depicts potential distribution with high spatial and temporal resolution; 2) can image large areas; 3) does not require filtering for signal or image enhancement; 4) is flexible, allowing for the acquisition of images of programmable size and shape at varying frame rates; and 5) has a large depth of field, thus minimizing the loss of focus... View full abstract»

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  • Recent progress in inverse problems in electrocardiology

    Publication Year: 1998, Page(s):73 - 83
    Cited by:  Papers (66)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2336 KB)

    The considerable progress achieved in the inverse problem of electrocardiography over the last decade has provided grounds for optimism about the possibility of approaching significant clinically relevant applications in the next decade. However, there are a number of basic questions that still remain. In addressing these questions, the authors feel it is important to seek solutions that emphasize... View full abstract»

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  • Quantitative techniques for analyzing high-resolution cardiac-mapping data

    Publication Year: 1998, Page(s):62 - 72
    Cited by:  Papers (15)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2004 KB)

    In high-resolution cardiac mapping, signals are simultaneously recorded from hundreds of electrodes in contact with the myocardium and then analyzed to reveal the underlying activation pattern. Activation mapping has a long history in both experimental and clinical cardiac electrophysiology and has also been used to study other organ systems. Much of the current emphasis in mapping technology is o... View full abstract»

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  • Extracting endocardial borders from sequential echocardiographic images

    Publication Year: 1998, Page(s):116 - 121
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1164 KB)

    The authors discuss using mathematical morphology and temporal information (TI) to improve contour accuracy in the segmentation of 2D echo images. When the input consists of a sequence of images with poor quality, TI is used to assist the contour-extraction process. Spatial information of the contour in Frame i-1 is combined with the initial contour in Frame i to give a better estimation of the in... View full abstract»

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  • Where did the U.S. patent laws come from?

    Publication Year: 1998
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Where did the U.S. patent laws come from? One answer is from from the greed of English kings and queens. To raise money for themselves and their friends, the kings and queens of England adopted a policy of granting monopolies called “letters patents” for everyday goods such as vinegar, wine, salt, paper, oil, bottles, you name it. The crown sold these letters patents to brokers (or gav... View full abstract»

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  • Classifying multichannel ECG patterns with an adaptive neural network

    Publication Year: 1998, Page(s):45 - 55
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1920 KB)

    In this article the authors describe the application of a new artificial neural network model aimed at the morphological classification of heartbeats detected on a multichannel ECG signal. They emphasize the special characteristics of the algorithm as an adaptive classifier with the capacity to dynamically self-organize its response to the characteristics of the ECG input signal. They also present... View full abstract»

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  • Systems for measuring and tracking electrophysiologic distributions

    Publication Year: 1998, Page(s):56 - 61
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    Electrocardiographic mapping has played an important role in the study and analysis of cardiac electrophysiologic phenomena. The first systems used for experimental or clinical studies were expensive, cumbersome, and limited in their ability to sample the complex electrophysiologic events associated with cardiac function and disease. New insights into the mechanisms of arrhythmias and the need for... View full abstract»

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  • Constructing a multichannel electrocardiography system from a few standardized, high-level components

    Publication Year: 1998, Page(s):34 - 38
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1464 KB)

    Multichannel systems for electrocardiography must be able to reliably measure and store large numbers of simultaneous low-frequency analog signals, while providing high gain, protection against defibrillation, and adequate electrical isolation. In the past, these specifications have been unique enough to force investigators to build up their systems from thousands of basic electronic components, l... View full abstract»

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Aims & Scope

IEEE Engineering in Medicine and Biology Magazine contains articles on current technologies and methods used in biomedical and clinical engineering.

 

This Magazine ceased publication in 2010. The current retitled publication is IEEE Pulse.

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