منابع مشابه
Transmission of Chosen Transform Coefficients of Normalized Cardiac Beats
A new technique for EGG compression is presented. Each delineated ECG beat is period normalied by multirate processing and then amplitude normalized. Discrete Wavelet Transform (DWT), based on Daubechies-4 basis functions is applied on these normalized beats, after shifting each of them to the origin. The concatenation of ordered DWT coefficients of these beats is a near-cyclostationary signal....
متن کاملSignificance of Ectopic Beats
More than 20 years ago the late Paul Wood stated, "On the whole . . . it is wise to assume the innocence of ectopic beats under any conditions, and to judge organic disease on other grounds."' Ectopic beats are common. They often arise from an irritable ventricular, sometimes supraventricular, focus and cause premature depolarization of the ventricles. Usually the premature beat leaves the vent...
متن کاملVentricular Fusion Beats.
VENTRICULAR FUSION, summation or combination beats occur when two separate pacemakers compete for control of the ventricles. The usual pair of pacemakers are the sinoatrial node and an ectopic ventricular focus; but any pair of pacemakers, whose impulses invade the ventricular myocardium more or less simultaneously but at different points, can produce fusion beats. An ectopic atrial focus or th...
متن کاملIs High Temporal Resolution Achievable for Paediatric Cardiac Acquisitions during Several Heart Beats? Illustration with Cardiac Phase Contrast Cine-MRI
BACKGROUND During paediatric cardiac Cine-MRI, data acquired during cycles of different lengths must be combined. Most of the time, Feinstein's model is used to project multiple cardiac cycles of variable lengths into a mean cycle. OBJECTIVE To assess the effect of Feinstein projection on temporal resolution of Cine-MRI. METHODS 1/The temporal errors during Feinstein's projection were compu...
متن کاملModel-based interpretation of cardiac beats by evolutionary algorithms: signal and model interaction
This paper presents a new approach for cardiac beat interpretation, based on a direct integration between a model and observed ECG signals. Physiological knowledge is represented by means of a semi-quantitative model of the cardiac electrical activity. The interpretation of cardiac beats is formalized as an optimization problem, by minimizing an error function defined between the model's output...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1888
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(02)16668-2