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Concerning EKG with a Non-obstructive angiogram. What happened?

Dr. Smith's ECG Blog

link] A 62 year old man with a history of hypertension, type 2 diabetes mellitus, and carotid artery stenosis called 911 at 9:30 in the morning with complaint of chest pain. Challenge QUESTION: The relative change in T-QRS-D is not the only thing that changes during period of time that passed between recording of the 2 ECGs shown in Figure-1.

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Anaphylaxis, chest pain, and ST elevation in aVR

Dr. Smith's ECG Blog

This pattern occurs regardless of whether the cause is ACS (decreased supply) or any other cause of decreased supply or increased demand. You must understand that this pattern does not differentiate ACS from other causes of supply/demand mismatch. ST depression will not always be present in 9/12 leads — as is seen in Figure-1.

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Judge for yourself the management of this patient with "NSTEMI, multivessel disease"

Dr. Smith's ECG Blog

References: 1) See this study showing an association between morphine and mortality in Non-STE-ACS: Meine TJ, Roe M, Chen A, Patel M, Washam J, Ohman E, Peacock W, Pollack C, Gibler W, Peterson E. Despite not being considered in this category, opioid medications are sometimes given for ACS. Am Heart J.

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Is this a STEMI? No, not by definition! Why not? Why is this Important?

Dr. Smith's ECG Blog

A 40-something male presented with dyspnea and left arm numbness, and perhaps some chest tightness, for 1 1/2 hours. Therefore, this does not meet the definition of myocardial infarction ( 4th Universal Definition of MI ), which requires at least one troponin above the 99% reference range. But maybe not. Mokhtari et al.

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What does the angiogram show? The Echo? The CT coronary angiogram? How do you explain this?

Dr. Smith's ECG Blog

Angiogram No obstructive epicardial coronary artery disease Cannot exclude non-ACS causes of troponin elevation including coronary vasospasm, stress cardiomyopathy, microvascular disease, etc. IMPRESSION: 1. hours T-wave are getting larger again The patient went for an angiogram at about 7 hours after arrival. Stroke-volume:50 ml.

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How important are old ECGs in Non-obvious cases of potential OMI?

Dr. Smith's ECG Blog

Learning Point: 1. For examples of such exceptions — See My Comment in the January 9, 2019 — August 22, 2020 — and June 30, 2023 posts in Dr. Smith's ECG Blog ). Figure-1: Comparison between the first 3 ECGs in today's case. How Would YOU Interpret the Serial Tracings in Figure-1? So they looked into the patient's chart.

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ABG Versus VBG in the Emergency Department

EMDocs

Introduction Arterial blood gas (ABG) or venous blood gas (VBG) testing is used to assess the pH and systemic carbon dioxide tension in patients, and, therefore, provide a more complete picture of their acid-base status than an isolated basic metabolic panel (BMP) (1). However, ABGs have many drawbacks compared to VBGs.