急性心肌梗死P-Q段下移的临床意义

Clinical significance of P-Q segment depression in pa-tients with acute myocardial infarction

为探讨急性心肌梗死P-Q段下移的临床意义,以心电图出现2个肢体导联(Ⅱ、aVF)和2个以上胸导联(V_2-V_6)p-Q段下移>0.5mm并超过24h为P-Q段下移的诊断标准,将72例首次出现Q波型的下壁或前壁急性心肌梗死患者分为P-Q段下移组(11例)和无P-Q段下移组(61例)进行观察。结果:P-Q段下移组超声心动描记术显示室壁运动指数、心室壁瘤和心包积液的发生率以及临床各种严重并发症的发生率显著高于无下移组(P<0.05)。认为急性心肌梗死出现P-Q段下移是患者预后不良的指标。

This paper was designed to evaluate cinical significance of P-Q segment depression. Seventy patients were studied during their first examination, who had been comfirmed to have Q mode acute inferior or anterior wall infarction (MI), through electrocardiogram and two-dimensional echocradiography (TDK). 0.5 mm of P-Q segment depression observed for >24h in both limbs (Ⅱ , aVF) and precordial (V2-V6) leads was considered as diagnostic criterion for P-Q segment depression. Patients were divided into two groups: group A consisted of 11 patients with P-Q segment depression and group B 61 cases with non-P-Q segment depression. Compared with those in group B, significant abnormality in wall motion index, aneurysm, and pericardial effusion were observed by TDE in group A( P <0. 05). P-Q segment depression might indicate an unfavourable prognosis in patients with acute MI, which is one of clinical signs of enlarged infarct size with severe complications.