Objective To analyse the change of the distribution ratio or diagnostic and therapeutic interventional procedures for cardiac patients at different stages during the past 15 years. Methods According to the date of admission the patients were divided into 2 groups:Group A (from 1987 to 1994,425 cases) and group B (from 1995 to 2001,1 623 cases).The constituent ratio of case with coronary heart diseases,arrhythmias,congenital heart diseases and other cardiovascular diseases,as well as the distribution ratio of various kinds of interventional procedures undergone were calculated,and the date of the two stages were compared.Results The mean catheterizations per year of Group A and Group B were 53?18 and 232?156 respectively ( P

Objective To evaluate effects of right ventricular septal pacing modes on treatment of heart failure.Methods Twelve dogs with heart failure were performed in every dog at random,and the pacing modes employed in the test included right atrium-right ventricular apex (RVA),right atrium-right ventricular septal(RVS),and right atrium-biventricular (Bi-V) ; The pacing frequency was 180 times per minute.The results were measured before pacing and after 15 minutes when the pacing became stable in Color Doppler echocardiography,including left ventricular end-diastolic diameter (LVEDd),left ventricular ejection fraction (LVEF),interventricular mechanical delay (IVMD),interventricular septum and left ventricular posterior wall motion delay (SPWMD),and left ventricular 12-segment peak time standard deviation (Ts-SD).Results Right ventricular septal pacing mode:(1)Compared with parameter before pacing and RVA pacing,LVEDd,IVMD,SPWMD,and Ts-SD decreased and LVEF increased,and the difference was significant(P ＜0.05).(2)Compared with Bi-V pacing,LVEDd,IVMD,and SPWMDandTs-SD increased and LVEF decreased,and the difference was significant (P ＜ 0.05).Conclusions Right ventricular septal pacing could improve ventricular synchrony and cardiac function partly,and the effect was better than right ventricular apical pacing but less than biventricular pacing,also could not be a alternative models of cardiac resynchronization therapy for heart failure.