1[2]Bashour TT.Classification of sinus node dysrunction.Am Heart J,2000,110:1251.
2[4]Reiffer JA,Bigger J,Cramer M.Ability of Holter electrodiographyic recording and atrial stimulation to de-test sinus nodal dysfunction in symptomatic and asymptomatic patients with sinus bradycardia.Am J Cardiol,1998,40:189.