tag:blogger.com,1999:blog-549949223388475481.post9188479767929320967..comments2024-03-26T22:42:04.176-05:00Comments on Dr. Smith's ECG Blog: Acute MI from LAD occlusion, or early repolarization?Unknownnoreply@blogger.comBlogger15125tag:blogger.com,1999:blog-549949223388475481.post-70723752874519947992018-09-16T08:04:18.147-05:002018-09-16T08:04:18.147-05:00MG. Read the study if you want to know all about ...MG. Read the study if you want to know all about it. The T-waves in both groups were the same height. T-wave height did NOT differentiate. T/R ratio did, because R-waves are small in MI.Steve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-41454340970463304382018-09-11T00:38:59.050-05:002018-09-11T00:38:59.050-05:00I was wondering if the height of T wave matters to...I was wondering if the height of T wave matters to differentiate between LAD occlusion and ER. If it does then why the equation doesn't include that as a variable?MGhttps://www.blogger.com/profile/06233522417024317416noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-30600218767164358532014-09-27T03:25:41.891-05:002014-09-27T03:25:41.891-05:00Yes, but not everyone recognizes it.Yes, but not everyone recognizes it.Steve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-21750635724259474502014-09-26T04:05:29.651-05:002014-09-26T04:05:29.651-05:00Sir, is there Hyper Acute T in leads V1,V2 and V3...Sir, is there Hyper Acute T in leads V1,V2 and V3 in 1st ECG?Equbal , Family Physicianhttps://www.blogger.com/profile/15668924554489069795noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-17946400478272921192014-01-30T14:37:49.950-06:002014-01-30T14:37:49.950-06:00Yes, that certainly can be helpful.Yes, that certainly can be helpful.Steve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-39387060132042595652014-01-30T13:29:04.647-06:002014-01-30T13:29:04.647-06:00Is it accurate to find another lead (usually lead ...Is it accurate to find another lead (usually lead II or V5 in the rhythm strip beneath the 12 lead) where it is easier to identify the transition from the QRS to the ST segment then draw a vertical line to to identify the exact electrical point in time where the J-point is located on the lead (beat) in question?Matthttps://www.blogger.com/profile/15353879391618415930noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-73686463872109825302013-11-14T18:37:00.122-06:002013-11-14T18:37:00.122-06:00Sorry, misunderstanding: 60 milliseconds is on the...Sorry, misunderstanding: 60 milliseconds is on the time (x) axis. the voltage, which is what you are measuring, is in millivolts and is on the vertical (y) axis. 1 mm = 0.1 millivolt, but we are making the measurement in millimeters. <br /><br />So you go to the right 1.5 little boxes (each one is 40 ms), then go up to the tracing line. Then measure how many millimeters it is above an imaginary horizontal line which is drawn over from the PR interval. Steve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-690774951463062982013-11-14T09:36:49.550-06:002013-11-14T09:36:49.550-06:00Dr Smith, i am getting confused about STe at 60ms...Dr Smith, i am getting confused about STe at 60ms. Do we calculate ste at j point in lead V3 because if we calculate it at 60 ms it will be same everytime.Anonymoushttps://www.blogger.com/profile/05340105013740657217noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-28581874035858504372013-02-11T16:03:46.751-06:002013-02-11T16:03:46.751-06:00Marton, it was a mid LAD occlusionMarton, it was a mid LAD occlusionSteve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-50823593588055680192013-02-11T14:51:57.221-06:002013-02-11T14:51:57.221-06:00Nice post again!:-)
Did this patient have inferio...Nice post again!:-)<br /><br />Did this patient have inferior and lateral wall motion abnormality too? In some cases LAD wraps around the diaphragmatic surface ("long LAD", supplying some part of the inferior wall), and if occluded proximally (before the first diagonal) then the opposite ST vectors of inferior and high lateral injury may cancel each other, and only anterior ST elevation can be seen. So inferior and high-lateral injury both remain silent.<br /><br />It came to my mind because there is a sign of nonspecific intraventricular conduction disturbance (fragmented QRS) in aVF (which can be a sign of focal block induced my ischaemia, however, can also be seen in normals), and the inferior and high lateral QRS amplitudes diminished compared to the first tracing. Maybe just because of technical things, I don't know.Anonymoushttps://www.blogger.com/profile/08292096280571000937noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-23322888470660618752012-04-16T12:53:46.575-05:002012-04-16T12:53:46.575-05:00The J-point is the end of the QRS and beginning of...The J-point is the end of the QRS and beginning of the ST segment. Usually, it is just an inflection point and it is the point where, if you draw a tangent, there is an equal angle between that tangent and the line that comes before and after it. OK?Steve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-13390329877026092962012-04-16T05:15:34.432-05:002012-04-16T05:15:34.432-05:00i wish someone could take a pin and actually point...i wish someone could take a pin and actually point to the "j" point. Seems someone usually points with their finger " its here" . And a figer is so big compared to such a small point, hence, Heisenberg principle follows and difficult for me to find the J point. However, i think it is the point where the s wave ends. And if you ask where this is? well i think this is where the ekg tracing begins to move from vertical to lateral tracing.brownmiesterhttps://www.blogger.com/profile/12949984829309227383noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-48684110234146738892010-03-20T06:45:22.904-05:002010-03-20T06:45:22.904-05:00Thank you, this is very interesting. Using the QT...Thank you, this is very interesting. Using the QT interval is not mentioned as a way of differentiating ischaemia and BER in Rosen's ECG textbook but it does make sense. Do you know the proportion of STEMIs that do not have a prolonged QT?Hakan L Yamanhttps://www.blogger.com/profile/12364068704089156760noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-57722197406949852682009-01-14T06:12:00.000-06:002009-01-14T06:12:00.000-06:00The J-point is where the QRS ends and the ST segme...The J-point is where the QRS ends and the ST segment beginsSteve Smithhttps://www.blogger.com/profile/08027289511840815536noreply@blogger.comtag:blogger.com,1999:blog-549949223388475481.post-28144440550987027392009-01-14T00:54:00.000-06:002009-01-14T00:54:00.000-06:00Can you please define the j point - vis the image?...Can you please define the j point - vis the image?<BR/><BR/>Thanks!Anonymousnoreply@blogger.com