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心肌梗死(MI)时,早期的心电图改变为T波呈对称性直立高耸,随即迅速出现斜形升高的ST段并与直立的T波连成“单向曲线”,通常在MI发生后数min至数h出现病理Q波。经数d至数W后升高的ST段开始逐渐回至等电位线。T波呈对称性倒置并较深尖。达最大深度后又渐变浅,最后变为固定浅倒或直立低平,全过程可达数W至数月之久。部分患者的T波可长期倒置,不再恢复,病理性Q波或QS波最为恒定,即一经出现常持久存在。仅个别患者随着梗死区的修复,Q波可变窄,甚至消失。 1 MI心电图分期 ①早期(超急性期)发病初期,无病理Q波出现,表现为T
Myocardial infarction (MI), the early ECG changes for the T wave symmetry upright towering, followed by the rapid rise of oblique ST segment and upright with the T wave into a “one-way curve,” usually in MI after the number of min to several hours pathological Q wave appeared. After the number of d to the number of W after the ST segment began to gradually back to the equipotential line. T waves were symmetrical inversion and deeper tip. Up to the maximum depth and then gradually shallow, and finally become a fixed shallow down or upright flat, the whole process up to several W to several months long. T wave of some patients can be long-term inversion, no longer recover, pathological Q wave or QS wave is the most constant, that is, there is often long-lasting existence. Only a few patients with infarction repair, Q wave can be narrowed, or even disappear. 1 MI electrocardiogram staging ① early (hyperacute phase) early onset, no pathological Q waves appear, the performance of T