| Abstract | Ventricular tachycardia （VT） and primary ventricular fibrillation （PVF） are the leading causes in cardiac sudden desth （CSD）. Some electrocardiographic changes which occurred before the onset of ventricular arrhythmias may reveal the electrical instability of the heart. To recognize and correct these abnormalities may be helpful for prevention of CSD. Electrocardiographic changes before and during onset of PVF monitoring in coronary care unit （CCU） or by Holter, have been studied retrospectively in the hospital. They were composed of 4 male and 12 female, aged 21−76 years （average 48.25 years）, and associated with one of the following disorders, such as ischemic heart disease, hypertension, mitral valve stenosis, myocarditis, hypokalemia, primary or secondary QT prolongation etc. As a mater of fact that VT or PVF often preceded by a lot of abnormalities of ECG in the group. |
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