cardiac arrhythmias, caused by disorders in the generation and transmission of cardiac impulses, is included among the heart disorders that cause inefficient blood circulation. the most commonly-used method for diagnosing this disorder is electrocardiography. in this study, we aimed to identify and diagnose different types of arrhythmia prevalent among the seemingly-healthy horses of sanandaj c...

Periods of reentrant activation and effective refractory periods are correlated with dominant frequency or reciprocal of cycle periods during ventricular fibrillation (VF). In the present study, we used an analysis technique based on Wigner transforms to quantify time-varying dominant frequencies in electrocardiograms (ECGs) during VF. We estimated dominant frequencies within orthogonal ECGs re...

It is now well known that the results of almost any examination or investigation may be reported differently by different workers, for example, the interpretation of a medical history (Cochrane et al., 1951), the detection of cyanosis (Comroe and Botelhoe, 1947) or clubbing (Pyke, 1954), the clinical diagnosis ofemphysema (Fletcher, 1952), the radiological detection of tuberculosis (Birkelow et...

TWO ASPECTS of the electrocardiogram, rhythm and voltage, have proved to be of particular importance in the management of dogs with orthotopic cardiac homotransplants. Arrhythmias are frequent in the early postoperative course as the heart recovers from the anoxic insult and adjusts to the denervated state and again in the later stages of cardiac rejection. Changes in the electrocardiographic v...

Abstract: Electrocardiogram recordings are very often contaminated by high-frequency noise usually power-line interference and EMG disturbances (tremor). Filtering out the tremor remains a priori partially successful since it has a relatively wide spectrum, which overlaps the useful ECG frequency band by aperiodic noise. The proposed simple approach for tremor suppression uses heuristic relatio...

The objective of the study was to determine the concordance of emergency physicians' and cardiologists' interpretations of emergency department (ED) electrocardiograms (ECG), to evaluate the impact of ECG misinterpretation on patient management, and to determine error rates as a function of the level of physician training and the specific ECG diagnoses. ECG interpretations were registered prosp...