1.Hayes DL,Zipes DP.Cardiac Pacemakers and Cardioverter‐Defibrillators/Eugene Braunwald.Heart Disease.7th ed.Phi‐ladelphia:Elsevier Saunders,2005:767‐802. 2.Eckhard Alt,S Serge Barold,Karl Stangl.Rate Adaptive Cardi ac Pacing.Berlin:Spring Verlag,1993. 3. ......