5mmol/L,ECG showed shape of tent appears high T wave,two were symmetrical,QRS complex wave increased the wide deformity,unstable intraventricular block,Q-T interval prolong,sino P wave disappeared,sino-ventricular conduction,P-R interval was prolong,R-Rinterval was nent torelatively spa.

AIM: To observe the change of sinoatrial conduction time(SACT) and protein expression level!of Cx43 in the region(around) sinoatrial nodes(SAN) in neonatal,adult and old SD rats,and to explore the molecular basis of SAN electrophysiological reconstruction.

Ventriculoatrial conduction by dual or multiple atrioventricular nodal pathways and its special electrophysiological phenomena;

The electrocardiogram characteristics and clinical meaning of untypical Wenckebach s phenomenon in atrioventricular conduction;

Applied anatomy of sinus tympani and facial recess under endoscope;