1Cohen M, DemersC,Gurfinkel EP, et al.A comparison of low molecular weight heparin with unfractionated heparin for unstab; coronary artery disease[J].N Engl J Med, 1997,337:447
2Cohen Gl, Pietrolungo JF, Thomas JD, et al. A practical guide to assess venteicularidstolic function using. Doppler echocardio graphy [J].JACC, 1996,27:1753
