Dr. Smith's ECG Blog

MARCH 14, 2024

We also studied 7 years of Code STEMI patients requiring emergent reperfusion, and found that 4% presented with an ECG labeled ‘normal’, often confirmed by the final blinded interpretation. Emergency department Code STEMI patients with initial electrocardiogram labeled ‘normal’ by computer interpretation: a 7-year retrospective review.

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Chest Pain STEMI Outcomes Academic 118

Dr. Smith's ECG Blog

OCTOBER 26, 2011

Echo on the day after admission showed EF of 30-35% and antero-apical wall akinesis with an LV thrombus [these frequently form in complete or near complete (no early reperfusion) anterior STEMI because of akinesis/stasis] 2 more days later, this was recorded: ST elevation is still present. The LAD has reperfused early. This was recorded 2.5

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STEMI Chest Pain Myocardial Infarction Angioplasty 52

Dr. Smith's ECG Blog

JUNE 11, 2024

Now it is a full blown STEMI of 3 myocardial territories: inferior, posterior, and lateral But at least it does not call it "Normal." Learning Points: You cannot trust conventional algorithms even to find STEMI(+) OMI, even when they say "normal ECG." At this point — a STEMI was diagnosed, and cardiac cath with PCI was performed.

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Dr. Smith's ECG Blog

JUNE 17, 2023

I believe there is not quite enough STE for formal STEMI criteria, but some might measure 1.0 mm of STE in II and III, or III and aVF, or V4 and V5, so some might say it fulfills STEMI criteria (remember, the interrater reliability of STEMI criteria is poor as shown in references below): McCabe et al. Carley et al. Emerg Med J.

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Chest Pain STEMI Myocardial Infarction Electrocardiogram 52

Dr. Smith's ECG Blog

MAY 23, 2023

Notice on the right side of the image how the algorithm correctly measures STE sufficient in V1 and V2 to meet STEMI criteria in a man older than age 40. As most would agree, this ECG shows highly specific findings of anterolateral OMI, even with STEMI criteria in this case. Thus, this is obvious STEMI(+) OMI until proven otherwise.

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Dr. Smith's ECG Blog

JANUARY 1, 2013

Precordial ST depression may be subendocardial ischemia or posterior STEMI. If you thought it might be a posterior STEMI, then you might have ordered a posterior ECG [change leads V4-V6 around to the back (V7-V9)]. So there was 3-vessel disease, but with an acute posterior STEMI. There is no ST elevation. See the list below.

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STEMI Ischemia Chest Pain Myocardial Infarction 52

Dr. Smith's ECG Blog

JUNE 12, 2017

This is diagnostic of inferior MI, though does not meet millimeter criteria for "STEMI." He was worried for inferior MI and ordered another, which was recorded 15 minutes later: Now clearly and obviously diagnostic of inferior STEMI. Unknown algorithm Interpretation: Inferior ST elevation, with reciprocal ST depression in aVL.

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Chest Pain STEMI Myocardial Infarction Electrocardiogram 52

Dr. Smith's ECG Blog

AUGUST 3, 2017

The precordial ST-depression pattern on this ECG (and in this clinical setting) should immediately raise suspicion of Posterior STEMI! Posterior STEMI occurs in approximately 15-20% of acute MI, but the vast majority of the time it is seen in conjunction with inferior (Infero-Posterior) or lateral (Postero-Lateral) STEMI (1).

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Chest Pain Myocardial Infarction STEMI Ischemia 52

Dr. Smith's ECG Blog

DECEMBER 29, 2023

But because there was no new ST elevation, the ECG was signed off as “STEMI negative” and the patient waited to be seen. But the ECG still doesn’t meet STEMI criteria. It was therefore interpreted as “no STEMI” and the patient was treated with dual anti-platelets and referred to cardiology as “NSTEMI.” the cardiologist 5.

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Chest Pain STEMI Myocardial Infarction Electrocardiogram 69

Dr. Smith's ECG Blog

MARCH 3, 2023

can cause ST-segment elevation (STE) on electrocardiogram (ECG), the distinction between them may be hard and complicated. Furthermore, some ECGs may not meet the STEMI criteria but may still be diagnostic for acute coronary occlusion (ACO).

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Chest Pain STEMI Download Blog 52

Dr. Smith's ECG Blog

DECEMBER 22, 2023

The patient with no prior cardiac history presented in the middle of the night with acute chest pain, and had this ECG recorded during active pain: I did not see any ischemia on this electrocardiogram. It does not look entirely normal, since there are some nonspecific STT abnormalities, such as flattening of the T waves in aVL.

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Dr. Smith's ECG Blog

NOVEMBER 4, 2022

This has been termed a “STEMI equivalent” and included in STEMI guidelines, suggesting this patient should receive dual anti-platelets, heparin and immediate cath lab activation–or thrombolysis in centres where cath lab is not available. aVR ST segment elevation: acute STEMI or not? aVR ST Segment Elevation: Acute STEMI or Not?

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Ischemia STEMI Stenosis Chest Pain 52

Stroke Journal

JANUARY 30, 2025

Introduction:Atrial fibrillation (AF), which can be easily identified through electrocardiogram (ECG), is a well-established predictor of ischemic stroke (IS) in comparison to other stroke subtypes. Stroke, Volume 56, Issue Suppl_1 , Page AWP317-AWP317, February 1, 2025. Analyses were conducted using R version 4.3.1.Results:In

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Dr. Smith's ECG Blog

MAY 30, 2023

There is an obvious inferior posterior STEMI(+) OMI. Methods Retrospective study of consecutive inferior STEMI , comparing ECGs of patients with, to those without, RVMI, as determined by angiographic coronary occlusion proximal to the RV marginal branch. A 12-lead electrocardiogram, lead V4R , and leads V7-9 were recorded on admission.

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Chest Pain Myocardial Infarction STEMI Cardiogenic Shock 97

Dr. Smith's ECG Blog

MARCH 8, 2021

This was just published in JAMA Internal Medicine: The de Winter Electrocardiogram Pattern Evolving From Hyperacute T Waves It reminded me that many believe, due to the assertions in the original de Winter's article, that de Winter's waves are stable. Interventionalist at the Receiving Hospital: "No STEMI, no cath. They are too narrow!

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Dr. Smith's ECG Blog

OCTOBER 28, 2013

The last section is a detailed discussion of the research on aVR in both STEMI and NonSTEMI. The additional ST Elevation in V1 is not usually seen with diffuse subendocardial ischemia, and suggests that something else, like STEMI from LAD occlusion, could be present. Updates on the Electrocardiogram in Acute Coronary Syndromes.

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Cardiac Arrest Ischemia Defibrillator Electrocardiogram 52

Dr. Smith's ECG Blog

NOVEMBER 15, 2013

You've read in my previous posts that I have a lot of evidence that Wellens' represents spontaneously reperfused STEMI in which the STEMI went unrecorded. New ST elevation diagnostic of STEMI [equation value = 25.3 This T-wave inversion morphology is very specific for Wellens' waves. Computerized QTc = 417. Patel DJ, et al.

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Chest Pain Thrombosis Myocardial Infarction STEMI 52

Dr. Smith's ECG Blog

MARCH 31, 2023

This was marked as "Not a STEMI" by the physicians. It is not a STEMI, but it is diagnostic of an LAD OMI (Occlusion MI). has outperformed many cardiologists in its ability to recognize with "high confidence" acute OMIs from ECGs not satisfying STEMI-criteria. This was sent to me by a friend.

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Chest Pain STEMI Blog Academic 52

Dr. Smith's ECG Blog

JANUARY 1, 2024

An initial electrocardiogram (ECG) is provided below. As per Dr. Aslanger — a number of medical providers were initial confused by what initially appears as marked ST elevation with reciprocal ST depression, indicative of an acute STEMI. The patient was promptly admitted to the hospital for further evaluation. What do you think?

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Tachycardia Blog Ischemia Heart Failure 111

EMS 12-Lead

MAY 20, 2022

This worried the crew of potential acute coronary syndrome and STEMI was activated pre-hospital. As it currently stands, an ST/S ratio >15% should raise awareness for new anterior STEMI. New insights into the use of the 12-lead electrocardiogram for diagnosing acute myocardial infarction in the emergency department.

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Cardiomyopathy Ischemia STEMI Coronary Angiogram 52

Dr. Smith's ECG Blog

FEBRUARY 4, 2022

Emergent cardiac outcomes in patients with normal electrocardiograms in the emergency department. These include about 60 occlusion MI (OMI) with clear ST segment elevation (none of which would be called “Normal” by the computer) and about 165 Non-STEMI. Am J Emerg Med. 2022 Jan;51:384-387. doi: 10.1016/j.ajem.2021.11.023. 2021.11.023.

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Chest Pain STEMI Article Myocardial Infarction 52

Dr. Smith's ECG Blog

NOVEMBER 10, 2017

Comment This paper has received some press recently: Safety of Computer Interpretation of Normal Triage Electrocardiograms The algorithm used was also the GE Marquette 12 SL. I don't know what her subsequent cardiac function was, but that is not the point of this post. But it could have been a disaster.

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Chest Pain Bradycardia Technology Electrocardiogram 52

Dr. Smith's ECG Blog

SEPTEMBER 30, 2019

You will note that it is essentially an unremarkable electrocardiogram except for some PACS. At baseline, the patient has some expected, normal STE in lead V2, further demonstrating that the STD morphology in the presentation ECG above is "true" and diagnostic. This raised our concerns that the findings on his initial one were real.

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Dr. Smith's ECG Blog

DECEMBER 27, 2018

A Deep Neural Network learning algorithm outperforms a conventional algorithm for emergency department electrocardiogram interpretation. But lead V2 has a worrisome amount of ST elevation, and in a chest pain patient, I would be worried about STEMI. I do research on Cardiologs' algorithm: Smith SW et al. What an honor.

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Dr. Smith's ECG Blog

FEBRUARY 15, 2018

3) STEMI criteria failed to identify this acute coronary occlusion, like many others. Learning Points: 1) As we have previously demonstrated, aVL was once again the key initial clue to diagnosing subtle RCA occlusion. 2) Contemporary troponins only start to rise 4-6 hours after the onset of acute coronary occlusion.

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Dr. Smith's ECG Blog

DECEMBER 15, 2023

Below is the post -PCI electrocardiogram. In the cath lab the patient was found to have a 100% occlusion of a small 1st marginal branch of the LCx. The culprit lesion was opened and stented. Initial high sensitivity Troponin T was 810ng/L, later peaking at 2333ng/L. The ST elevation in lead aVL has disappeared.

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Dr. Smith's ECG Blog

JANUARY 17, 2024

The limb leads have been removed because there was no ST elevation in those leads, the QRS complexes have been obscured because this is irrelevant to STEMI criteria, and red lines have been added to measure ST segment elevation. But STEMI criteria ignore all this and look at ST segments in isolation.

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Chest Pain STEMI Myocardial Infarction Blog 117

Dr. Smith's ECG Blog

FEBRUARY 6, 2020

They recorded a prehospital ECG and diagnosed STEMI and activated the cath lab prehospital. The stress electrocardiogram is non-diagnostic. male with a history of HTN and ETOH developed squeezing epigastric abdominal pain with associated vomiting and diaphoresis, followed by a syncopal episode which lasted about 10 seconds.

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Chest Pain Ischemia Angina Electrocardiogram 40

Dr. Smith's ECG Blog

DECEMBER 22, 2022

Smith , d and Muzaffer Değertekin a DIFOCCULT: DIagnostic accuracy oF electrocardiogram for acute coronary OCClUsion resuLTing in myocardial infarction. His first electrocardiogram ( ECG) is given below: --Sinus bradycardia. Take home messages: 1- In STEMI/NSTEMI paradigm you search for STE on ECG. Turk Kardiyol Dern Ars.

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STEMI Chest Pain Myocardial Infarction Electrocardiogram 52

Dr. Smith's ECG Blog

MARCH 10, 2017

Safety of Computer Interpretation of Normal Triage Electrocardiograms. The cath lab was activated, as it should be with transient STEMI. See this case of transient STEMI: Spontaneous Reperfusion and Re-occlusion - My Bad Thinking Contributes to a Death. It is not yet available, but this is your way to get on the list.

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STEMI Chest Pain Myocardial Infarction Electrocardiogram 52

Dr. Smith's ECG Blog

MARCH 13, 2013

You can see how V1, V2, aVR, and V4R would have ST elevation in either a right ventricular STEMI or with a septal STEMI, and how lateral leads, and even posterior leads, would have reciprocal ST depression. of patients with anterior STEMI, ST elevation of greater than or equal to 3.0 STE in V4R is confirmatory evidence.

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STEMI Myocardial Infarction Electrocardiogram Chest Pain 52

Dr. Smith's ECG Blog

OCTOBER 9, 2018

The utility of the triage electrocardiogram for the detection of ST-segment elevation myocardial infarction. link] In this paper, in a department in which they state they have only 50 STEMI per year, they looked at only 8 days worth of triage ECGs for a total of 538. They did not find one STEMI on their triage ECGs (no surprise!

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Chest Pain STEMI Cardiac Arrest Blog 52

Dr. Smith's ECG Blog

MAY 8, 2023

Code STEMI was activated by the ED physician based on the diagnostic ECG for LAD OMI in ventricular paced rhythm. This was several months after the 2022 ACC Guidelines adding modified Sgarbossa criteria as a STEMI equivalent in ventricular paced rhythm). LAFB, atrial flutter, anterolateral STEMI(+) OMI. Limkakeng AT.

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Chest Pain Myocardial Infarction STEMI Pacemaker 52

Dr. Smith's ECG Blog

AUGUST 9, 2019

When total LM occlusion does present with STE in aVR, there is ALWAYS ST Elevation elsewhere which makes STEMI obvious; in other words, STE is never limited to only aVR but instead it is part of a massive and usually obvious STEMI. All are, however, clearly massive STEMI. This is her ECG: An obvious STEMI, but which artery?

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Myocardial Infarction Ischemia STEMI Cardiogenic Shock 52

Dr. Smith's ECG Blog

MARCH 6, 2019

This is technically a STEMI, with 1.5 However, I think many practitioners might not see this as a clear STEMI, and would instead call this "borderline." They collected several repeat ECGs at the outside hospital before transport: None of these three ECGs meet STEMI criteria. This ECG was recorded on arrival: What do you think?

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STEMI Chest Pain Ischemia Myocardial Infarction 52

EMS 12-Lead

APRIL 8, 2022

BP 142/100 HR 90 RR 16 (BBS CTA) SpO2 99 (RA) Dstick 110 My colleagues noted the ST-depression in the respective leads, as well, and STEMI activated to the nearest PCI center. 1] Here is the admitting ED ECG after cancellation of Code STEMI. The EMS crews were correct moving forward with STEMI activation. 1] Driver, B.

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Myocardial Infarction Coronary Angiogram STEMI Ischemia 52

Dr. Smith's ECG Blog

MARCH 11, 2016

cm diameter in the apex The presence of thrombus led the clinicians to state that this was a "late presentation STEMI." It does take some time for thrombus to form, but the EKG and the troponin profile show that this was NOT a late presentation STEMI. LV Thrombus , 1.5 0 0 1 95 544 MMRF 4 1 638 14.0 0 0 1 41 238 MMRF 1 1 278 14.0

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