102 causes of heart arythmia were treated at Kien An General Hospital - Hai Phong from January 2002 to October 2002. There was no difference between male and female subjects in the prevalence of heart arythmia. Its predominance was at the age group above 51 years old. Sinusal tachyarythmia and atrial fibrillation were prevailed among all types. Rheumatism valvular disease, blood hypertension were the most common condition and primary causes of atrial fibrillation and combines arythmia. Chronical cardio-pulmonary diseases and diverse shocks were the second rank of leading causes. Left branch blockade and ventricle tachyrythmia of patients with IV degree of heart failure were nearly severe prognostic factors. Mortality was very high with ventricle failure.
Arrhythmias, Cardiac/etiology ; Diagnosis ; Epidemiology ; Therapeutics

Humans ; Endoplasmic Reticulum Stress ; Heart Failure ; Arrhythmias, Cardiac/etiology* ; Apoptosis

Arrhythmias, Cardiac ; etiology ; prevention & control ; Cardiac Pacing, Artificial ; adverse effects ; methods ; Humans

Arrhythmias, Cardiac ; etiology ; Birth Weight ; Electrocardiography ; Female ; Humans ; Hypocalcemia ; complications ; Infant, Newborn ; Male

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

Arrhythmias, Cardiac ; etiology ; Coronary Vessels ; pathology ; Humans ; Male ; Mediastinal Cyst ; pathology ; Young Adult

Arrhythmias, Cardiac ; etiology ; therapy ; Gap Junctions ; Stem Cell Transplantation ; adverse effects

We invented an efficiently approach to building whole-heart electrophysiological model with cellular automata style massive parallel computing. In this paper, we introduce the simulation facilities of a model we built and the potential application of such model. The first use is to solve the forward problem of electrocardiogram. Simulating arrhythmia ECG and accurately interpreting the significance of various irregular waveforms will be the key goal. Investigating the dynamic property of cardioelectrical activity at cellular and channel levels is the second application, aiming at revealing the mechanism of the generation and sustentation of arrhythmia. Third, the model can be used to research the impacts of artificial interventions on cardioelectrical activity. Electrical defibrillation and pace-making as well as the use of channel block agents are all cases.
Arrhythmias, Cardiac ; etiology ; physiopathology ; Computer Simulation ; Electrocardiography ; methods ; Electrophysiology ; Heart ; physiology ; Humans ; Models, Cardiovascular

OBJECTIVETo study the ECG features in children with dilated cardiomyopathy (DCM), and related factors for the occurrence of arrhythmia secondary to DCM.

METHODSData from 68 children with DCM from January 1998 to March 2011 were studied. The children were classified into three groups: severe arrhythmia (n=42), non-severe arrhythmia (n=20) and non-arrhythmia (n=6). Left ventricular end diastolic diameter (LVED), left ventricular ejection fraction (LVEF) and left ventricular fractional shortening (LVFS) were compared.

RESULTSAbnormal ECG results were found in all of the 68 children with DCM. Sinus tachycardia (91%) and ectopic pulsatile (86%) were common. LVED in the severe arrhythmia group (74±6 mm) was greater than that in the non-severe arrhythmia group (65±4 mm; P<0.05) and non-arrhythmia group (61±3 mm; P<0.05). LVED in the non-severe arrhythmia group was also greater than that in the non-arrhythmia group (P<0.05). LVEF and LVFS in the severe arrhythmia group were (30±11)% and (22±4)%, respectively, which were lower than those in the non-severe arrhythmia group［(37±12)% and (28±5)%, respectively］and non-arrhythmia group［(45±9)% and (34±7)%, respectively］(P<0.05). There were also significant differences in the LVEF and LVFS between the non-severe arrhythmia and non-arrhythmia groups (P<0.05).

CONCLUSIONSThe common abnormal ECG findings are sinus tachycardia and ectopic pulsatile in children with DCM. Arrhythmia is one of the main clinical manifestations of DCM. The occurrence of arrhythmia is associated with the left ventricular size and heart function.

Adolescent ; Arrhythmias, Cardiac ; etiology ; Cardiomyopathy, Dilated ; complications ; physiopathology ; Child ; Child, Preschool ; Electrocardiography ; Female ; Humans ; Infant ; Male

An algorithm of detecting the TWA (T-wave alternans) based on the maximum of T waves transformed by FFT (Fast Fourier Transform) is described in the paper. By using the method we can reduce the sampling rate, which means "smaller amount of calculation", and solve the problem "the sampling point of T wave changes with the rate of heart beat". The 128 maximum values of T wave in series normal ST-T complex are used to carry out FFT transforms. The TWA is detected by using the frequency of power spectrum.
Algorithms ; Arrhythmias, Cardiac ; diagnosis ; etiology ; physiopathology ; Electrocardiography ; Fourier Analysis ; Heart Rate ; Humans