EMS 12-Lead

AUGUST 22, 2022

Beats 9-12 : Continuation of the previously described events, all inducible by the pause (and thus, prolongation of refractoriness) created by the PVC of Beat 8. The coronary angiogram revealed no critical stenosis, or acute plaque ulceration. Beat 4 abruptly halts this repetitious cycle via Peel Back. References Chiale, P. Saini, A.,

E-9-1-1 130

E-9-1-1 Coronary ALS ICU 130

Dr. Smith's ECG Blog

DECEMBER 19, 2023

The commonest causes of MINOCA include: atherosclerotic causes such as plaque rupture or erosion with spontaneous thrombolysis, and non-atherosclerotic causes such as coronary vasospasm (sometimes called variant angina or Prinzmetal's angina), coronary embolism or thrombosis, possibly microvascular dysfunction. This is not the case.

E-9-1-1 121

E-9-1-1 Coronary ACS BLS 121

Dr. Smith's ECG Blog

APRIL 22, 2024

A comparison of electrocardiographic changes during reperfusion of acute myocardial infarction by thrombolysis or percutaneous transluminal coronary angioplasty. Lemkes JS, et al. Total coronary occlusion, if very brief, may have minimal infarction and yet be very dangerous. Am Heart J. 2000;139:430–436. Eur Heart J [Internet].

Coronary 120

Coronary STEMI ED OR 120

REBEL EM

JANUARY 29, 2024

Click here for Direct Download of the Podcast Paper: Aykan AC et al. References: Jaff MR et al. PMID: 21422387 Wan S et al. PMID: 15262836 Sharifi M et al. PMID: 27422214 Wang C et al. PMID: 19741062 Kucher N et al. PMID: 24226805 Piazza G et al. Clin Exp Emerg Med 2023. in the paper but 2.7%

ALS 136

ALS ACS OR CPR 136

Dr. Smith's ECG Blog

OCTOBER 3, 2024

Coronaries were clean. Not OMI with High Confidence Click here to sign up for Queen of Hearts Access We showed that the Queen of Hearts decreases false positive cath lab activations: 1) Published recently in Prehospital Emergency Care Baker PO et al. 2) To be presented at AHA conference in Chicago in 2 weeks: Sharkey SW et al.

E-9-1-1 113

E-9-1-1 Coronary ALS ED 113

EMS 12-Lead

APRIL 28, 2022

This particular facility is situated for independent living, thus no medical providers are on site to provide pertinent details for medical history, medication intake, or remarkable events prior to the incident at hand. 1] The morphology of PVT closely mirrors that of TdP but the underlying mechanism differs from reversible QT prolongation.

E-9-1-1 130

E-9-1-1 ALS Coronary EMS 130

Dr. Smith's ECG Blog

JUNE 27, 2024

The proof of this is that only 5% of patients enrolled had acute coronary occlusion. Lemkes JS, Janssens GN, van der Hoeven NW, et al. Coronary Angiography after Cardiac Arrest without ST-Segment Elevation. We at Hennepin recently published this study Sharma et al. This study failed to do so. 5% vs. 58%!! 5% vs. 58%!!

Defibrillator 93

Defibrillator STEMI Coronary ALS 93

EMDocs

FEBRUARY 7, 2024

GLP-1 agonists are also associated with improved ejection fraction, coronary blood flow, and cardiac output while reducing the risk of cardiovascular events, infarction size, and all-cause mortality. Adverse events are common in those using GLP-1 agonists, but the vast majority of these are minor. What are the complications?

Allergic Reaction 75

Allergic Reaction ALS CAD OR 75

Dr. Smith's ECG Blog

JANUARY 27, 2024

Old ‘NSTEMI’ A history of coronary artery disease and a stent to the same territory further increases pre-test likelihood of acute coronary occlusion, including in-stent thrombosis. So the patient had a transient acute coronary occlusion that spontaneously reperfused but is at risk for reocclusion. Deutch et al.

STEMI 104

STEMI Coronary ACS ED 104

EMS 12-Lead

APRIL 2, 2022

He reported a history of ischemic cardiomyopathy with coronary stent placement approximately 10 years prior, but could not recall the specific artery involved. Whether this represents a potential acute cardiac event would depend on the history, comparison with prior tracings and serial tracings. 4] Baranchuk, A, et al.

ALS 130

ALS STEMI Coronary OR 130

Dr. Smith's ECG Blog

OCTOBER 22, 2024

The coronary angiography showed a 100% ostial main (obtuse) marginal occlusion!" Dominant right coronary, atherosclerotic and calcified. Presence of a single coronary lesion: occlusion of the ostial main marginal. Clinically — this means we need to pay even more attention to seemingly subtle ECG changes.

Coronary 69

Coronary STEMI OR ALS 69

Dr. Smith's ECG Blog

OCTOBER 24, 2019

The biphasic T wave is consistent with recent reperfusion of an occluded coronary artery supplying the inferior region. Here’s the angiogram of the RCA : No thrombus or plaque rupture in the RCA (or any coronary artery) was found. This MI wasn’t caused by a ruptured plaque of CAD - it was a coronary artery dissection of the RCA.

Coronary 52

Coronary CAD ACS STEMI 52

Dr. Smith's ECG Blog

DECEMBER 20, 2024

Written by Willy Frick with edits by Ken Grauer An older man with a history of non-ischemic HFrEF s/p CRT and mild coronary artery disease presented with chest pain. The most common way is by delivering a lead into the coronary sinus ostium in the RA, which wraps around the posterolateral portion of the LV. ECG 1 What do you think?

Defibrillator 75

Defibrillator Coronary ALS Emergency Department 75

REBEL EM

SEPTEMBER 12, 2022

Background: Coronary artery disease can result in hibernating myocardium (chronic myocardial contractile dysfunction) due to ischemia. The theory is that there is reduced coronary blood flow and increased myocardial demand resulting in impaired contractility. Paper: Perera D et al. OMT: 38.0% HR 0.99; 95% CI 0.78 to 1.27; p = 0.96

Coronary 52

Coronary ALS OR EMS 52

Dr. Smith's ECG Blog

SEPTEMBER 11, 2024

Acute MI per se usually does not depress cardiac function and blood pressure enough to cause syncope ( Mostafa et al — J Com Hosp Intern Med Perspect 13(4):9-12, 2023 - ). The initial ECG in today's case was recognized as definitely abnormal — but the question arose as to whether this ECG indicated old infarction vs a new acute event.

EMS 108

EMS CPR ED Coronary 108

Dr. Smith's ECG Blog

NOVEMBER 30, 2022

Takotsubo is a sudden event, not one with crescendo angina. Hospital Course The patient was taken emergently to the cath lab which did not reveal any significant coronary artery disease, but she was noted to have reduced EF consistent with Takotsubo cardiomyopathy. An angiogram is a "lumenogram;" most plaque is EXTRALUMINAL!!

Emergency Department 52

Emergency Department E-9-1-1 Coronary STEMI 52

Dr. Smith's ECG Blog

NOVEMBER 15, 2013

It shows that on a 7 day angiogram, only 58% of re-occlusions were symptomatic: Ohman EM, Califf RM, Topol EJ et al. It is important to recognize that coronary thrombosis is dynamic , with spontaneous opening and lysing of the thrombus in the infarct-related artery (we all have endogenous tPA and plasmin to lyse thrombi).

Coronary 52

Coronary STEMI ALS Emergency Department 52

Dr. Smith's ECG Blog

JANUARY 9, 2023

Repeat CT angio chest (not CT coronary, unclear what protocol) showed possible LAD aneurysm and thrombus. Finally, coronary angiography was performed (at least 5 days after presentation) which confirmed LAD aneurysm with large thrombus burden, TIMI 0 flow, thrombectomy performed. Smith’s ECG Blog of young adults with acute MI ).

Coronary 52

Coronary STEMI Heart Attack OR 52

Dr. Smith's ECG Blog

SEPTEMBER 5, 2024

A Short Comment on PIRP and T Waves: Oliva et al found a strong association of myocardial rupture with postinfarction regional pericarditis. Another possible cause of pseudonormalization of T waves mentioned many times on this blog is the pseudonormalization caused by re-occlusion of an infarct related reperfused coronary artery.

STEMI 104

STEMI Coronary OR ALS 104

Dr. Smith's ECG Blog

SEPTEMBER 7, 2024

Lemkes et al. A comparison of electrocardiographic changes during reperfusion of acute myocardial infarction by thrombolysis or percutaneous transluminal coronary angioplasty. And dynamic ST-T wave changes between ECG #1 and ECG #2 confirm an acute event in progress. Eur Heart J 2018. Full text link. Am Heart J.

STEMI 115

STEMI ACS Critical Care Coronary 115

Dr. Smith's ECG Blog

NOVEMBER 3, 2023

The De Winter ECG pattern: morphology and accuracy for diagnosing acute coronary occlusion: systematic review. Hayakawa A, Tsukahara K, Miyagawa S, et al. Immediate and early percutaneous coronary intervention in very high-risk and high-risk non-ST segment elevation myocardial infarction patients. 2009;95:1701–1706. As per Drs.

ACS 86

ACS Coronary ALS CAD 86

Dr. Smith's ECG Blog

JANUARY 5, 2024

Heitner et al. We know that even high-sensitivity troponin may not exceed the "normal" range for a period of hours in certain patients with acute coronary occlusion. The PDA plaque was also bulky, but was not described as inflamed or ulcerated. DOI:10.1161/CIRCINTERVENTIONS.118.007305), DOI:10.1161/CIRCINTERVENTIONS.118.007305),

ACS 109

ACS ALS OR STEMI 109

Dr. Smith's ECG Blog

JULY 31, 2020

Their OMI Manifesto details how use of standard STEMI criteria results in an unacceptable level of inaccuracy, in which an estimated 25-30% of acute coronary occlusions are missed! The article by Aslanger, Smith et al that is featured above in today’s post has just been published. ST depression that is maximal in leads V2-to-V4.

STEMI 52

STEMI Coronary EMR ALS 52

Dr. Smith's ECG Blog

NOVEMBER 5, 2023

By Magnus Nossen, edits by Grauer and Smith The patient is a 70-something female with DMII, HTN and an extensive prior history of coronary artery disease and myocardial infarctions. PLUS — Today's patient is an older woman with known severe coronary disease who presented with new chest pain. She's had multiple PCI procedures.

Coronary 102

Coronary OR ALS 102

ACEP Now

OCTOBER 29, 2024

Does that normal troponin and ECG obviate the need for cardiology consultation for my patient with a concerning story for acute coronary syndrome? Knack SKS, Scott N, Driver BE, Pet al. Thiruganasambandamoorthy V, Kwong K, Wells GA, et al. Freund Y, Cachanado M, Aubry A, et al. Penaloza A, Verschuren F, Meyer G, et al.

Emergency Department 59

Emergency Department ALS Emergency Medical Services OR 59

Dr. Smith's ECG Blog

JUNE 5, 2023

Aside on ECG Research: 20% of Definite diagnostic STEMI (Cox et al.) have perfect coronary flow by the time of angiogram. The fatter-than-it-should-be T wave in lead aVL is the mirror image opposite picture of the ST-T wave in lead III ==> reciprocal change that strongly suggests a recent ( if not still ongoing acute ) event.

STEMI 77

STEMI Coronary ED Ambulance 77

Dr. Smith's ECG Blog

JULY 27, 2023

I was not worried for a coronary etiology. Under most circumstances — this combination of ECG findings would point to an acute event. PEARL #3: The pathophysiologic mechanism for producing amphetamine-induced acute MI is unclear ( Bazmi et al — SQUMJ 17(10); e31-37, 2017 — and — Sinha et al — Case Rep Cardiol, 2016 ).

Coronary 52

Coronary ACS Naloxone Plasma 52

Dr. Smith's ECG Blog

JULY 22, 2023

The patient proceeded to cath where all coronaries were described as normal with no evidence of any CAD, spasm, or any other abnormality. In the largest study looking at this topic by Mizusawa et al., Recently the rate of true arrhythmic events related to fevers in the classic Brugada Type 1 syndrome was explored by Michowitz et al.

E-9-1-1 69

E-9-1-1 CAD OR STEMI 69

Dr. Smith's ECG Blog

APRIL 22, 2022

Backus BE, Six AJ, Kelder JC, et al. Moumneh T, Sun BC, Baecker A, et al. Identifying patients with low risk for acute coronary syndrome without troponin testing: validation of the HEAR score. Shah ASV, Anand A, Sandoval Y, et al. Patel J, Alattar F, Koneru J, et al. Gulati M, Levy P, Mukherjee D, et al.

E-9-1-1 52

E-9-1-1 STEMI ALS ED 52

Dr. Smith's ECG Blog

DECEMBER 29, 2023

STEMI criteria is bad at differentiating between normal variant and acute coronary occlusion or reperfusion, and initial troponin levels don't differentiate between occlusive and non-occlusive MI 3. the presence of J waves from early repolarization doesn’t rule out an acute coronary occlusion 4. McLaren et al, including Meyers/Smith.

STEMI 73

STEMI Coronary OR ALS 73

EM Didactic

JANUARY 27, 2019

If there is no defined injury or event that could have led to a soft tissue injury, we should be reluctant to render a diagnosis of musculoskeletal pain. References: Canto JG, Shlipak MG, Rogers WJ, et al. Dorsch MF, Lawrence RA, Sapsford RJ, et al. Uretsky BF, Farquahr DS, Berezin AF, et al. Am J Cardiol 1987; 60:219–24.

ACS 52

ACS ALS Coronary Emergency Department 52

EMDocs

OCTOBER 30, 2023

16 In a study conducted by Millet et al. A retrospective study done in May 2023, by Shaish et al 24 showed a 30 % reduction in accuracy of NCCT compared to CECT in a study done among 201 adult ED patients with abdominal pain. link] Bellolio MF, Heien HC, Sangaralingham LR, et al. References Abelson R. The New York Times.

E-9-1-1 73

E-9-1-1 Emergency Department ALS ED 73

Dr. Smith's ECG Blog

OCTOBER 28, 2022

Learn about the Smith-Modified Sgarbossa Criteria for Diagnosis of OMI Paced Rhythm: Dodd, Meyers, Smith, et al. Electrocardiographic diagnosis of acute coronary Occlusion Myocardial Infarction in ventricular paced rhythm using the modified Sgarbossa criteria. Annals of Emergency Medicine 2021. Figure-1: The 2nd ECG in today's case. (

Coronary 52

Coronary Paramedic EMS ICU 52

Dr. Smith's ECG Blog

NOVEMBER 19, 2016

The diagnostic coronary angiogram identified only minimal coronary artery disease, but there was a severely calcified, ‘immobile’ aortic valve. Author continued : STE in aVR is often due to left main coronary artery obstruction (OR 4.72), and is associated with in-hospital cardiovascular mortality (OR 5.58).

Coronary 40

Coronary ACS ALS STEMI 40

Dr. Smith's ECG Blog

FEBRUARY 13, 2023

Meyers et al. Accuracy of OMI findings versus STEMI criteria for diagnosis of acute coronary occlusion myocardial infarction. Aslanger et al. DIagnostic accuracy oF electrocardiogram for acute coronary OCClusion resulTing in myocardial infarction (DIFOCCULT study). Lemkes et al. Bergmark et al.

STEMI 52

STEMI Paramedic Coronary ALS 52

Dr. Smith's ECG Blog

NOVEMBER 12, 2020

And so it is wise to look at the coronary arteries. This ECG certainly looks like myocarditis, and was due to myocarditis, but missing acute coronary occlusion is not acceptable. 3–8 Shi et al. In acute MI, the T-wave is large, and the T/ST ratio is high. This is much more typical of myocarditis. Angiogram was negative.

E-9-1-1 52

E-9-1-1 STEMI Coronary ALS 52

Dr. Smith's ECG Blog

JUNE 1, 2022

Moreover, the research which appears to confirm this idea was indeed in relation to the circumflex, but they did not study Occlusion ; rather, they studied asymptomatic coronary disease. I showed conclusively that this is a common finding in normal ECGs, though it is more common in LAD Occlusion than in norml variant STE.

STEMI 52

STEMI Coronary OR ALS 52