tag:blogger.com,1999:blog-549949223388475481.post1848110807934163884..comments2024-03-26T22:42:04.176-05:00Comments on Dr. Smith's ECG Blog: The development of an inferior-posterior STEMI, from prehospital to hospitalUnknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-549949223388475481.post-4249622209284081462016-05-03T06:10:31.120-05:002016-05-03T06:10:31.120-05:00Looking at this, I'm not sure that the "p...Looking at this, I'm not sure that the "posterior ECG" really was posterior, as the QRS looks exactly the same as the previous. However, to answer your question in more general terms: the posterior leads must record electrical activiity through a lot of lung tissue (air), which is a good insulator. This diminishes the voltage. Freqently, posterior lead give a false sense of security. So I always recomment that, if you diagnose posterior MI on the regular 12-lead, do NOT change your mind based on absence of STE in posterior leads. And remember that the "criteria" for posterior leads is 0.5 mm, not 1 mm, and to especially evaluate in the context of proportionality to the QRS.Steve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-34259071221054612042016-05-02T11:00:01.999-05:002016-05-02T11:00:01.999-05:00Dear Smith
can you explain why there is STD in V2 ...Dear Smith<br />can you explain why there is STD in V2 without STE in post leads? just mean that there is ischemia in anterior wall? without post leads, how can we different they? Thanks<br />Anonymousnoreply@blogger.com