tag:blogger.com,1999:blog-549949223388475481.post27502636015376861..comments2024-03-28T14:02:08.119-05:00Comments on Dr. Smith's ECG Blog: Cardiac Arrest suddenly after blood loss, is it due to MI? Also, when the rhythm looks like torsade, it is usually not.Unknownnoreply@blogger.comBlogger4125tag:blogger.com,1999:blog-549949223388475481.post-1478449574410021602016-09-20T06:06:48.676-05:002016-09-20T06:06:48.676-05:00Magnesium is ok in any case. QT prolongation in M...Magnesium is ok in any case. QT prolongation in MI is modest. It usually takes a QTc of greater than 500 to cause torsade.Steve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-4708497457271450712016-09-20T01:45:53.710-05:002016-09-20T01:45:53.710-05:00so in the setting of acute MI, where QT is usually...so in the setting of acute MI, where QT is usually prolonged due to ischemia, polymorphic VT is actually a V Fib? should we give Magnesium only to torsades pts then?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-33546488286256064682010-07-20T07:44:08.434-05:002010-07-20T07:44:08.434-05:00That's correct. Polymorphic V tach can be due...That's correct. Polymorphic V tach can be due to long QT, in which case it is torsade and has one category of management options. If no long QT, then usually it is due to ischemia, as in this case, and is managed like ventricular fibrillation.Steve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-48839420432056178062010-07-06T08:25:40.319-05:002010-07-06T08:25:40.319-05:00So then is Torsades merely a name for a polymorphi...So then is Torsades merely a name for a polymorphic v-tach due to a long QT (and R-on-T)? Or is there more of a difference in how the two behave?<br /><br />Thanks!Christopherhttps://www.blogger.com/profile/11415988855392944633noreply@blogger.com