3Chandraratna Par, Hodges M: Electrocardiographic evidence of left aerial. Hypertesion in a cute. Myocardia L in -farction[J]. Circulation, 1973,92:29.
4Forfang K, Stake G. P wave terminal force and perisisting ST. elevations in chronic ischemic heart disease[ J]. Am Heart J, 1976,92:297.
5Morris JJ. Jr, Estes, EHJr, Whalen RE, et al. Pwave analysis in valvularheart disease[J]. Circulation, 1964,29:242.