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下壁心肌梗塞的心电图诊断通常依据常规12导联心电图在Ⅱ、Ⅲ、avF导联出现坏死型Q波来诊断,但阳性率偏低,有时部分病人不出现坏死型Q波,部分病人坏死型Q波在恢复期振幅与时间均缩小,甚至消失。Stein等指出仅38％的病例能在心电图上作出诊断,因此敏感性和特异性都受到限制,近来Ovsgsneie等提出了诊断下壁心肌梗塞Ⅲ、avF新标准可获得较高的阳性率,为此,本文通过32例下壁心肌梗塞及50例正常者,将新标准与传统标准作比较,以评价其对下壁心肌梗塞的诊断价值。 1 方法与标准 1.1 异常组 经临床确诊的32例下壁心肌梗塞,男26例,女6例,年龄47～82岁,平均年龄63.84岁,均为1991年2月～91年12月间入院的病人。 1.2 正常组 随机抽样50例健康成人作对照,男25,女25,年龄40～72岁,平均69.84岁,临床体检均正常。
ECG diagnosis of inferior myocardial infarction is usually based on conventional 12-lead ECG in the Ⅱ, Ⅲ, avF lead to the diagnosis of necrotic Q wave, but the positive rate is low, and some patients do not appear necrotic Q wave, and some patients with necrosis Q wave in the recovery period amplitude and time are reduced, or even disappear. Stein and other pointed out that only 38% of cases can be diagnosed on the ECG, the sensitivity and specificity are limited, recently Ovsgsnene et al proposed diagnosis of inferior myocardial infarction Ⅲ, avF new standard can get a higher positive rate, In this paper, 32 cases of inferior myocardial infarction and 50 normal persons, the new standard compared with the traditional criteria to evaluate its diagnostic value of inferior myocardial infarction. 1 Methods and Standards 1.1 Abnormal group of clinically diagnosed 32 cases of inferior myocardial infarction, 26 males and 6 females, aged 47 to 82 years, mean age 63.84 years, were admitted to hospital from February 1991 to December 1991 Of patients. 1.2 normal group random sample of 50 healthy adults as control, male 25, female 25, aged 40 to 72 years, mean 69.84 years old, clinical examination were normal.