ECG Cases 52 – The Art of Occlusion MI, part 1: Mirror Image

In this month's ECG Cases Jesse McLaren takes us through 6 cases highlighting important mirror concepts in ECG interpretation including: which leads are reciprocal to each other, how to identify which is the main ST/T change and which is the mirror, reciprocal changes highlighting subtle inferior, lateral and posterior OMI, ST elevation in aVR as a mirror to widespread ST depression and more...

ECG Cases 51 – Artifact and Lead Misplacement

ECG artifact and lead reversal can mimic tachy-arrhythmia, infarct or Brugada. Learn how to identify these errors to prevent misdiagnosis on this month's ECG Cases with Dr. Jesse McLaren... Help Support EM Cases by Giving a Donation here: https://emergencymedicinecases.com/donation/

ECG Cases 50 – STEMI: A Failed Paradigm, Enter Occlusion MI

Dr. Jesse McLaren illustrates the paradigm shift from STEMI to Occlusion MI (OMI) through 9 cases, and drives home the points that if there is STEMI criteria, consider false positives (eg. secondary and proportional to LVH or BER); if there is no STEMI criteria, consider false negatives and look for other signs of occlusion (eg. acute Q waves or loss of R waves, hyperacute T waves, or reciprocal STD/TWI) and if the ECG is nondiagnostic, consider other OMI signs including clinical (refractory ischemia, hemodynamic/electrical instability) and POCUS (new regional wall motion abnormalities).

ECG Cases 49 – ECG and POCUS for Dyspnea and Chest Pain

In this ECG Cases blog, Jesse McLaren and Rajiv Thavanathan explore how ECG and POCUS complement each other for patients presenting to the emergency department with shortness of breath or chest pain. They explain complementary diagnostic insights into pericardial effusion and cardiac tamponade, occlusion MI and RV strain...

ECG Cases 48 – ECG Interpretation in Cardiac Arrest

In this month's ECG Cases blog Dr. Jesse McLaren reviews interpretation of the pre-arrest ECG: identifying high risk ECGs requiring empiric treatment like calcium for hyperkalemia, magnesium for long QT, or reperfusion for Occlusion MI; the intra-arrest ECG: identifying pseudo-PEA; and post-arrest ECG: the importance of serial ECGs to reduce false positive STEMI, role of POCUS to help with the differential of diffuse ST depression with reciprocal ST elevation in aVR, and identifying signs of Occlusion MI/ false negative STEMI...

ECG Cases 47 – ECG Interpretation in Toxicology

In this ECG Cases Dr. Jesse McLaren delves into ECG interpretation in toxicology and the poisoned patient using his HEARTS approach in 7 case examples. Heart rate/rhythm: consider antidotes for brady/tachy-arrhythmias, and for sinus tachycardia consider fluids for vasodilation and benzodiazepines for agitation. Electrical conduction and axis: consider sodium bicarb for QRS > 100 especially if RBBB or terminal rightward shift, and magnesium for QTc> 500. ST/T changes: consider the differential including demand ischemia, associated electrolyte abnormalities, Brugada pattern from sodium channel blockade, and acute coronary occlusion vs vasospasm from cocaine...

ECG Cases 46 ECG in Fever and Infectious Disease

In this ECG Cases blog Dr. Jesse McLaren guides us through 10 cases, driving home the points that sepsis is a common cause of rapid Afib and diffuse ST depression with reciprocal ST elevation in aVR, myo/pericarditis is a diagnosis of exclusion, endocarditis or lyme carditis can cause AV block, PE can cause low grade fever and ECG signs of acute RV strain and that fever can unmask Brugada syndrome...

ECG Cases 45 ECG in Weakness and Neurological Symptoms

In this ECG Cases blog Dr. Jesse MacLaren guides us through 10 cases of patients who present with generalized weakness or acute neurologic symptoms and discusses how to look for ECG signs of dysrhythmias, electrolyte emergencies, acute coronary occlusion, and demand ischemia in patients with generalized weakness and in patients with neurologic symptoms, to consider predisposing factors like LVH; seizure-like activity from cardiac syncope; TIA/CVA embolic sources like atrial fibrillation or LV thrombus; or cardiac complications like stress-induced cardiomyopathy...

ECG Cases 44 ECG Interpretation in Epigastric pain, Vomiting

In this ECG Cases blog with Dr. Jesse McLaren we interpret 10 ECG cases and explore cardiac, metabolic and GI causes: We consider anginal equivalents, and look for ECG signs of Occlusion MI, including subacute occlusion from delayed presentations. We consider electrolyte disturbances and look for ECG signs of hyperkalemia or hypokalemia/hypomagnesemia, and we consider the differential of diffuse ST depression with reciprocal ST elevation in aVR, and false positive STEMI...

EM Quick Hits 50 Normal Unenhanced CT Renal Colic DDx, Perichondritis, Magnesium in Pediatric Asthma, Steroids for Pneumonia, OMI Cath Lab Activation

On this month's EM Quick Hits podcast David Carr on differential diagnosis of normal unenhanced CT renal colic, Leeor Sommer on recognition and management of perichondritis and auricular abscess, Suzanne Schuh on IV magnesium sulphate for pediatric asthma, Jess McLaren on Occlusion MI ECG interpretation requiring cath lab activation and Justin Morgenstern on update on steroids for pneumonia... Please support EM Cases with a donation: https://emergencymedicinecases.com/donation/

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