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2nd degree AV block: is this Mobitz I or II? And why the varying P-P intervals?

Dr. Smith's ECG Blog

The ECG shows sinus rhythm with a rate of about 78 and 2:1 AV conduction along with right bundle branch block and left anterior fascicular block. 2:1 block is a special case, because the tracing lacks successive PR intervals. I have labeled the P waves below for ease of reference: P waves 8 and 9 both conduct to the ventricles.

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International Prehospital Medicine Institute Literature Review, July 2025

JEMS

Perkins ZB, Greenhalgh R, Avest E, et al. International Prehospital Medicine Institute Literature Review, June 2025 1. Perkins ZB, Greenhalgh R, Avest E, et al. The authors classified repeat encounters into one of four categories; medical (61%), trauma (29%), lift assist only (9%) and cardiac arrest (1%).

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Interns are not (yet) poisoned by the STEMI/NSTEMI paradigm

Dr. Smith's ECG Blog

Patient initially presented at 9 PM to a referring facility with hsTnI 13 (ref: < 34 ng/L) then 30, then 60. EKG 1 What do you think? EKG 1 interpretation: Normal sinus rhythm, heart rate 60, normal axis, Q waves in III, aVF, with STE and TWI in lead III. EKG 2 Subtle changes but overall pretty similar to EKG 1.

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EM@3AM: Systematic Approach to Massive Hemorrhage and Nuances in Special Patient Populations

EMDocs

1 These values can be difficult to quickly assess and measure in a fast-paced clinical scenario. See Figure 1. 9 Current best practice suggests a 1:1:1 administration of PRBC, Platelets, and FFP. 10 g/dL in patients with acute coronary syndrome (ACS). O- PRBC should be given to all others.

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Repost this one

Dr. Smith's ECG Blog

Repost this one A 30-something with 8 hours of chest pain and an e. Is this acute coronary occlusion? QT Correction Formulas Compared to The Rule of Thu. A 30-something with It is not a STEMI; it is an opportunity to save my. A male in his 50s with chest pain. What is your in. Simple ACS?

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huge inf right lateral RV afib block vfib

Dr. Smith's ECG Blog

Repost this one A 30-something with 8 hours of chest pain and an e. Is this acute coronary occlusion? QT Correction Formulas Compared to The Rule of Thu. A 30-something with It is not a STEMI; it is an opportunity to save my. A male in his 50s with chest pain. What is your in. Simple ACS?

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great EKG of heart block, RBBB, TIMI-3 flow in LAD

Dr. Smith's ECG Blog

Intubated External pacing To cath lab Coronaries ok Pacemaker Posted by Steve Smith at 8:16 AM Email This BlogThis! A man in his early sixties with palpitations An elderly patient with a fall, QS-waves, and ST E. And have you ever. Viral symptoms, then acute chest pain and this ECG. A young woman with epigastric pain.