Arrhythmias, Cardiac ; pathology ; physiopathology ; Humans ; Purkinje Fibers

Arrhythmias, Cardiac ; physiopathology ; Child ; Electrocardiography ; Humans ; Male ; Tachycardia, Ventricular ; physiopathology

Arrhythmias, Cardiac ; diagnosis ; Electrocardiography ; Heart Ventricles ; physiopathology ; Prognosis

Arrhythmias, Cardiac ; physiopathology ; Electromyography ; methods ; Female ; Humans ; Infant, Newborn ; Male

Malignant arrhythmias and ventricular fibrillation are generally accepted as one of the major causes of death in cardiovascular diseases. Based on the H-H equations, the mathematical model of the cardiac cell action potential consists of the ion channels, pumps, exchangers and transporters that are closely connected with intra- and extra-cellular ion concentrations, the channel's conditions, nerve transductors and drugs. It can build the link between cell electrophysiology and clinical pathophysiology. By altering the cellular environments the computer simulating study on this kind of model can help us look into the electrophysiological changes of the cardiac tissue and even the whole heart and investigate the mechanisms of the cardiac arrhythmias as well. The components of the model and its computer simulating study are introduced in the paper.
Action Potentials ; Arrhythmias, Cardiac ; physiopathology ; Computer Simulation ; Heart ; physiopathology ; Humans ; Models, Cardiovascular ; Ventricular Fibrillation ; physiopathology

Arrhythmias, Cardiac ; etiology ; physiopathology ; Humans ; Myocardial Infarction ; physiopathology ; Sympathetic Nervous System ; physiopathology

Aged ; Anthracosis ; physiopathology ; Arrhythmias, Cardiac ; physiopathology ; Case-Control Studies ; Electrocardiography ; Humans ; Middle Aged

Aged ; Arrhythmias, Cardiac ; diagnosis ; physiopathology ; Coal Mining ; Electrocardiography ; Humans ; Male ; Middle Aged ; Pneumoconiosis ; complications ; physiopathology

Ion channelopathies are the mainly etiopathogenisis of inherited arrhythmia. Those arrhythmia syndromes are commonly caused by ion channel gene mutation, which can be classified as sodium,potassium and calcium ion channel mutation.Changes in the genes encoding for cardiac ion channel subunits produce modification in the function of the channels, and cause the dysfunctions of cardiac electrical activity; and the clinical manifestation is malignant arrhythmia.
Animals ; Arrhythmias, Cardiac ; genetics ; physiopathology ; Channelopathies ; genetics ; physiopathology ; Humans ; Ion Channels ; genetics ; physiology ; Mutation

In this paper, an algorithm for atrial premature beat classification with abnormal ECG rhythm analysis is presented. The classification algorithm identifies QRS morphology by template matching and recognizes abnormal ECG rhythm by the features of heart rate and ECG. Algorithm has been evaluated by the MIT-BIH arrhythmia database and the results show that the specificity and the sensitivity for atrial premature beat are 99.5% and 96.9% respectively. atrial premature, arrhythmia, beat classification
Algorithms ; Arrhythmias, Cardiac ; physiopathology ; Atrial Premature Complexes ; physiopathology ; Electrocardiography ; methods ; Signal Processing, Computer-Assisted