About Jesse McLaren

Dr. Jesse McLaren (@ECGcases), is an Emergency Physician in Toronto with a special interest in emergency cardiology quality improvement and education. He is an Assistant Professor at the University of Toronto.

ECG Cases 32 Prehospital ECG pearls and pitfalls

In this ECG Cases blog we review 8 cases of patients with prehospital ECGs and explore prehospital ECGs for diagnosing STEMI, Occlusion MI, false STEMI, code STEMI, dynamic ischemic changes, truncated voltages. Can you avoid the pitfalls and spot the pearls that help to make the diagnosis?

ECG Cases 31 Is a 15 lead ECG better than 12? Diagnosing Posterior MI and RVMI

Is 15 lead ECG better than 12 lead for diagnosing posterior MI or right ventricular infarction? When do you need a 15 lead ECG? Jesse McLaren guides us through 8 cases to highlight the steps and pitfalls in diagnosing posterior MI and RVMI in light of recent ECG literature...

ECG Cases 30 Beware Computer Interpretation Errors

Computer interpretation of the ECG has been called a double-edged sword: when correct, it increases physician accuracy, but when incorrect it increases errors. This is especially problematic in the emergency department, where computer accuracy drops as clinical significance increases—with common errors for arrhythmias and ischemia. Jesse McLaren guides us through 10 cases where the computer interpretation misguides us and how to avoid these pitfalls...

ECG Cases 29 Misdiagnosis from Lead Misplacement, Artifact and Lead Reversal

In this ECG Cases blog we review 10 cases of possible artifact, lead reversal and lead misplacement. Can you spot the abnormalities and avoid the misdiagnosis?...

ECG Cases 28 Approach to Atrial Fibrillation

Jesse McLaren explains his AFIB mnemonic for approach to atrial fibrillation that involves 4 questions: 1. Is it atrial fibrillation? 2. If it is atrial fibrillation and there is rapid ventricular response, is it fast from a secondary cause? 3. If it is atrial fibrillation with a rapid ventricular response without a secondary cause, what is the intervention? 4. Does the patient need an anticoagulant started in the ED? and runs through 10 cases to elucidate the nuances of atrial fibrillation management on this ECG Cases blog...

By |2022-02-28T10:29:20-05:00February 28th, 2022|Categories: ECG Cases|Tags: , , |0 Comments

ECG Cases 27 Pericarditis – Diagnosis of Exclusion

Jesse McLaren guides us through 9 cases and explains how pericarditis is a diagnosis of exclusion through 3 simple steps: 1. Exclude more serious causes of chest pain, eg wraparound LAD occlusion, inferior OMI 2. Exclude complications of pericarditis, eg myocarditis, large pericardial effusion 3. Exclude normal variant ST elevation presenting with benign chest pain on this month's ECG Cases blog...

ECG Cases 26: Pulmonary Embolism and Acute RV Strain

In this month's ECG Cases Dr. Jesse McLaren runs through 10 cases and explains how the ECG can be integral in the diagnosis and management of pulmonary embolism, even though it is not incorporated into any of the commonly used decision tools for diagnosis of pulmonary embolism...

ECG Cases 25: ‘Late STEMI’ – How acute is the coronary occlusion?

In this ECG Cases blog we look at 10 patients with potentially ischemic symptoms. Which had a coronary occlusion, and how acute were they? Jesse McLaren explains 'Late STEMI' and how reperfusion strategies should not be based on time of symptom onset...

ECG Cases 24 Reciprocal Change and Occlusion MI

Dr. Jesse MacLaren reviews 10 ECG cases highlighting how reciprocal change can be secondary to LBBB/LVH, primary changes, or both, how it can be the first and remain the dominant sign of occlusion, pointing to subtle ST elevation or hyperacute T waves, how it can can highlight subtle inferior, lateral or proximal LAD occlusions, how it can be the only sign of posterior OMI; and how it can be absent in mid-distal LAD occlusion...

ECG Cases 23 – Wellens syndrome, reperfusion and reocclusion MI

Eight patients presented with potentially ischemic symptoms and T-wave inversions. Which had occlusion MI, which were reperfused and which were reoccluded? Jesse McLaren helps you discover the nuances of Wellens syndrome and T-wave inversions on this month's ECG Cases blog...

By |2021-07-13T12:27:47-04:00July 13th, 2021|Categories: Cardiology, ECG Cases, Emergency Medicine, Medical Specialty|Tags: , , , |0 Comments
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