The normal P wave morphology is upright in leads I, II, and aVF, but it is inverted in lead aVR. The P wave istypically biphasic in lead V1(positive-negative), but when the negative terminal component of the P wave exceeds 0.04 seconds in duration (equivalent to one small box), it ...
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The rhythm is irregular and there is a pattern of group beating (ie, two QRS complexes followed by a pause). The average rate is 66 beats/min. The first of the QRS complexes has a P (+) wave with a stable PR interval (0.12 sec). The P wave is positive in leads I, II, aVF,...
Inferior STEMI is usually caused byocclusion of the right coronary artery, or less commonly the left circumflex artery, causing infarction of the inferior wall of the heart [6, 7]. Upon ECG analysis, inferior STEMI displays ST-elevation in leads II, III, and aVF. ...
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在均匀致密完整的围岩中，受到初始的垂直应力σv=10MPa和水平应力σh=15MPa。在该岩体中进行圆形硐室开挖，如下图所示，R0=5m。假设在开挖完成后围岩依然处于弹性状态，请问在硐顶岩壁处（θ=90°，R0=5m）的最大主应力为
tennis on Saturday Yours, .I have a happy life, What about you? Karl 1.What does Karl think of math? A. Easy and interestin g.B. Easy but borin g. C. Useful but difficult.D. Interesting and useful. 2.What time is the last class over? A. At3:00.B. At3:30.C. At4:20.D....
Twitter Google Share on Facebook AcronymDefinition AVRTAddictive Voice Recognition Technique(for self-recovery from substance addiction; Rational Recovery Systems, Inc.) AVRTAtrioventricular Reentrant Tachycardia AVRTAtrioventricular Reciprocating Tachycardia ...
在日常生活中，我们常常会碰到这种现象：晚上脱衣服睡觉时，黑暗中常听到噼啪的声响，而且伴有蓝光，见面握手时，手指刚一接触到对方，会突然感到指尖针刺般刺痛，令人大惊失色；早上起来梳头时，头发会经常“飘”起来，越理越乱，拉门把手、开水龙头时都会“触电”，时常发出“啪、啪”的声响，上述的几种现象就是...
It took courage and persistence to stay the course in the shadowland.