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急性前间壁

 
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lin91957
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PostPosted: Sat 22:00, 05 Mar 2011    Post subject: 急性前间壁

急性前间壁心肌梗死U波改变1例
酸甘油3片,半小时左右疼痛缓解。患者冠心病史34年.1978年曾发生下壁正后壁心梗;高血压病史42年;1974年患左侧脑梗塞。查体:T38O℃,BP18/10kPa,神清,精神差。心电图;ST段下降明显.V下降0.1mV.V.下降0.2mV,V下降0.25~O.3mV,V6下降0125mV,U波倒置v2,v探度为0.05mV,V.,Vs倒置探度为0O5~01mV.心肌酶谱:乳酸脱氢酶(LI)H)209U/L;口一羟丁酸脱氢酶(a-HI~H):28OU/L;肌酸磷酸擞酶(CPK):560U/L;谷草转氨酶(GOT):86U/L。随即按心梗处理。当日21t3O心电圉:V.V。,Vs导联R波无明显变化,但T嫂出现切迹,u波例置加深,V倒置0.1mV,V;倒置0.15mV,V。倒置0.2mV,qT问期延长,血钾39mmol几患者烦躁,心电监护偶见房早室早液体内加利多卡因控制心律失常9月3日10t35心电图R波V,V较前降低。ST段出现抬高。Vz抬高0.15~0.2mV,V。,V,抬高0.1mV.T波Va~V出现倒置,u波倒置9月3日16,2O心电图R波V。。V,继续降低.ST段V抬高01mV,V抬高0.15mV+V抬高0.2mV。T波倒置较前加深,u波仍倒置。9月4日至9日分别做心电图,u波倒置遂渐变浅,9月12日U波倒置恢复正常12日心肌酶谱LI)H14]u/L+a-IfBDH170U/L,CPK100U/L,GOT37u/L后来查几敬心肌酶谱除LI)H略高外+余均正常1O月l7日患者又感胸闷、心前区疼痛.BP18/10kPa。听诊两肺无罗音,心率8O敬/mln.律齐给氧.古硝酸甘油5mln症状缓解心电图T波由倒置变直立.u波Va又倒置0.05mV.7时后复查心电图:T波恢复倒置.u波又开始倒置。发病6h后心肌酶谱LI)H189U/L.~-HBI)H166U/L,CPK55U/L.GOT17u,10月18日心电圉u波倒置变浅.以后复查心电圉u波均束倒置。2讨论u波是继T波之后的一十小而圆钝的波,u波方向一般与T嫂方向一致,u波在v.v,导联中很小.正常应小于T/2.但低钾时明显。u波可以受多种因素的影响.u波倒置可发生在运动试验、心力衰竭高血压性心脏病、冠心病、工心脏刺激等情况u波倒置探度大于0.05mV时才有意义j倒置的u波被认为是左冠状动脉或冠状动脉前降支梗阻的可靠佐证]。本例心梗患者发病后4h来院就诊心电图u波倒置等于0.05mV(0.5ram),晚上(印发病15h)u波倒置在V.导联深达0.2mV(2mil1)。继后虽然束出现病理性Q波,但第二天可见R波V,V.V导联遂渐降低,ST段抬高,T波逐渐变倒置.随后出现心梗典型演变过程。这十病例u波倒置出现在R嫂降低及sT段抬高之前,并且发现u波的倒置与恢复跟心肌酶谱高低心绞痛的严重程度呈正相关9月2日心肌酶谱较高,u波恢复较慢,约持续10d第2次夜间发病(与第1次发病间隔45d),原恢复正常的u波又开始倒置.心肌酶谱略高,u波持续倒置后1~2d内恢复正常.这说明u嫂倒置不但是心肌缺血的表现,而且也是心肌梗死的表现之一所以u嫂倒置也见于心肌梗死-我们遇到心梗患者绝大多数井无u波倒置。这十病例也是在众多的病例中发现的,供同行参考
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