Objective To explore causes and high risk electrocardiogram expression of cardiac syncope caused by malignant rapid ventricular arrhythmia.Methods Forty-eight patients were analysed, they had cardiac syncope once or more that after which were admitted to the hospital. Results The basic causes of cardiac syncope were individed following types in 48 patients: coronary heart disease with acute or dated myocardial infarction,dilated or hypertrophic cardiomyopathy,hypokalaemia were ordinarist inducer.Torsade de pointes(TdP) were most common type of malignant rapid ventricular arrhythmia.They had some high risk electrocardiogram expression: secondary long QT syndrome,Brugada's syndrome,idiopathic abnormal J wave,complex ventricular ectopic beats,acute myocardial infarction with ST-T electrical alternation; or extensive anterior myocardial infarction with tombstone ST segment elevation,dilated cardiomyopathy with advance QRS complex low voltage.They were different electrocardiographic and clinical characteristic. Conclusion The cardiac syncope caused by malignant rapid ventricular arrhythmia is not single and independent clinical entity, which presents different the causes and high risk electrocardiogram expression.

Objective To observe the effect of basic fibroblast growth factor (bFGF) on magnetic resonance spectroscopy of vascular dementia (VD) rats.Methods After the VD model was reproduced, the 12 rats were randomly divided into the therapy group and dementia group with 6 animals in each group. Another 6 rats were selected as sham operation group. The VD rats in therapy group were treated with bFGF by hypodermic injection. After 5 weeks, abilities of learning and memory of three groups' rats were tested by Morris water maze. The changes of magnetic resonance spectroscopy and N-acetyl aspartate (NAA), NAA/（Cr＋Cho） in lobus temporalis of VD rats were also observed.Results Abilities of learning and memory of rats significantly improved in the therapy group than that in the dementia group (P<0.01). The values of NAA, NAA/（Cr＋Cho） in lobus temporalis of VD rats significantly increased in the therapy group than that in the dementia group (P<0.01).Conclusion bFGF by hypodermic injection can obviously elevate abilities of learning and memory and the values of NAA, NAA/（Cr＋Cho） in lobus temporalis of VD rats.