Tag Archive for: LBBB

R.E.B.E.L. ECG of the Week: LBBB and STEMI

09 Jun
June 9, 2014

R.E.B.E.L. ECG of the Week

89 year old male with PMH of hypertension, stage 3 chronic kidney disease with chief complaint of shortness of breath. Several days ago patient had a laminectomy for radicular pain. He was doing fine post-operatively and began to develop gradual shortness of breath.  He had no complaints of chest pain, nausea/vomiting, fevers, diaphoresis, but did have some weakness.  There were no prior ECGs for comparison.

BP: 98/48 HR: 103 RR: 18 O2 on RA: 94% Temp: 38.6

JVD to the angle of the mandible
Bibasilar Crackles
Sinus Tachycardia
Bilateral lower extremity pitting edema

Labs: Na 125, K+ 4.2, Creatinine 2, BNP > 2500

ECG from triage is shown… Read more →

Modified Sgarbossa Criteria: Ready for Primetime?

03 Dec
December 3, 2013

Modified Sgarbossa CriteriaThe recognition of ST-segment elevation myocardial infarction (STEMI) in the presence of left bundle-branch block (LBBB) remains difficult and frustrating to both emergency medicine physicians and cardiologists.  According to the 2004 STEMI guidelines, emergent reperfusion therapy was recommended to patients with suspected ischemia and new LBBB however, the new 2013 STEMI guidelines made a drastic change by removing this recommendation.  Several papers have recently been published discussing a modified Sgarbossa’s criteria and a new algorithm to help decrease false cath lab activation and/or fibrinolytic therapy but, are they ready for primetime? Read more →

Bundle Branch Blocks: 101

01 Nov
November 1, 2013

Electrical Conduction System of the HeartRecently, I have been asked by several students at my home institution (UTHSC at San Antonio) to help them understand bundle branch blocks.  This is different than some of my usual posts because it is meant to be more educational than evidence based.  So here we go.  The normal conduction system of the healthy heart is shown to the right.  If there is a delay or block in the left or right bundle, depolarization will take longer to occur. Therefore we get a widened QRS (>0.12 sec or >3 small boxes).

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