循环疾病心电图（Circulation disease ECG）.docVIP

循环疾病心电图（Circulation disease ECG） I. myocardial infarction 1. basic graphics: Necrosis Q wave, time 0.04 seconds, depth 1/4R. The injury of ST elevation, backgroundsome. Ischemic T wave changes. 2. ECG evolution: Within several hours of onset, there is no abnormal or only towering T wave. A few hours after the onset, ST segment elevation was arched, ST segment and T wave formed by the fusion of one-way curve. There are pathological Q waves within a few hours to two days. This is an acute change, and the pathological Q wave is permanent (sometimes Q wave disappears). The ST segment elevation sustainable several days to about two weeks after the return to baseline level, T wave can be flat or inverted, the subacute phase change. After the onset of weeks and months, T wave was inverted V, inverted T wave could be permanent, or in a few months to several years after the return to normal. 3. ECG localization: anteroseptal V1---V3 Under the wall II, III, avF Extensive anterior wall V1---V5 High side wall I avL anterolateral V5 - V7 I avL Two. ECG manifestation of chronic coronary insufficiency 1. changes of T wave, the first TV1, TV5, and T wave flat (T 1/10R), bidirectional, or even inverted (QRS wave group based on R can be inverted, such as AVR, V3R, III, V1, V2 can be inverted). 2. ST segment down more than 0.05mv (except AVR). 3. arrhythmia, conduction block. 4. QT interval prolongation (normal heart rate, QT interval, 0.36~0.44 sec). Three. Atrial premature beat: 1. early appearance of atrial P wave, the shape is different from sinus. P -R interval is more than 0.12 seconds. After 2. atrial P wave, there is a normal morphology of QRS wave group, and the T wave is consistent with the main wave of QRS wave. 3. incomplete compensatory pause. Four. Premature beat at junctional zone 1., the QRS wave group in advance appears to be basically normal. 2. P wave may have three kinds: the first is retrograde P wave (i.e. inverted P wave), and QRS wave group, but the P -R 0.