High Yield Electrocardiographs for the Step 2 CK Exam - USMLE Forums
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USMLE Step 2 CK Bits & Pieces High yield short focused points, monographs, charts, illustrations, tables, and other stuff related to the USMLE Step 2 CK Exam.


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  #1  
Old 07-12-2011
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EKG High Yield Electrocardiographs for the Step 2 CK Exam

High Yield ECGs for the USMLE Step 2 CK Exam

1- Wolff-Parkinson-White (WPW) syndrome. The upper tracing is a 12-lead electrocardiogram in a patient with WPW and reveals a short PR interval and slurring of the upstroke of the QRS complex in multiple leads (delta waves). The lower tracing demonstrates rapid atrial fibrillation in a patient with WPW. The irregular cycle lengths, wide QRS complexes with occasional normal QRS complexes, and very rapid rate should suggest the diagnosis of atrial fibrillation in the presence of an atrioventricular bypass tract.

High Yield Electrocardiographs for the Step 2 CK Exam-wpw.jpg
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2- ECG indicates severe mitral stenosis. Note the right axis deviation (frontal plane axis = +120), the left atrial conduction abnormality (large terminal negative component of the P wave in V1), and the right ventricular hypertrophy (R wave in V1 and right axis deviation). This is the murmur of mitral stenosis.

High Yield Electrocardiographs for the Step 2 CK Exam-ms-ekg.jpg
click image to enlarge

3- 2:1 second-degree atrioventricular [AV] block) There are two P waves to each QRS complex. The P-R interval prior to the dropped P wave is always the same. It is not possible to define this type of AV block as type I or type II Mobitz block, and it is, therefore, a third variety of second-degree AV block (arrows show P waves).

High Yield Electrocardiographs for the Step 2 CK Exam-second-degree-av-block-ecg.jpg
click image to enlarge

4- Heart block. A, First-degree atrioventricular (AV) block; the PR interval is prolonged (>200 msec). B, Second-degree AV block, type I (Wenckebach). There is progressive PR prolongation preceding a nonconducted P wave (arrows). C, Second-degree AV block, type II. Nonconducted P waves are seen (arrows) in the absence of progressive PR prolongation. D, Third-degree (complete) AV block with AV dissociation and a narrow-complex (AV nodal) escape rhythm

High Yield Electrocardiographs for the Step 2 CK Exam-first-degree-av-block-ecg.jpg
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5- Ventricular fibrillation: bizarre, disorganized rhythm with waves that vary in size.

High Yield Electrocardiographs for the Step 2 CK Exam-ventricular-fibrillation-ekg.jpg
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6- right bundle branch block pattern
High Yield Electrocardiographs for the Step 2 CK Exam-rbbb.jpg
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7- electrocardiogram (ECG) demonstrates ST segment elevation in I, aVL, and V2–V6 consistent with an acute anterolateral myocardial infarction (MI).

High Yield Electrocardiographs for the Step 2 CK Exam-st-elevation-ecg.jpg
click image to enlarge

8- ECG of an inferior myocardial infarction. Note the raised ST-segment and Q waves in the inferior leads (II, III, aVF). The additional T-wave inversion in V4 and V5 probably represents anterior wall ischemia.

High Yield Electrocardiographs for the Step 2 CK Exam-inferior-mi-ecg.jpg
click image to enlarge

9- This ECG shows a constant P-R interval with a nonconducted P wave, which is most consistent with type II second-degree AV block and often progresses to third-degree block

High Yield Electrocardiographs for the Step 2 CK Exam-second-degree-2-ecg.jpg
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10- pericarditis. diffuse ST elevation

High Yield Electrocardiographs for the Step 2 CK Exam-pericarditis-ecg.jpg
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  #2  
Old 05-30-2012
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Smile h

thank you so much its highly useful
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Old 02-11-2013
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This is very helpful, thanks.
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Old 06-29-2013
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Thank you so much
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Old 07-21-2013
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High Yield
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Old 09-08-2013
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Default ekg

thanx.......for sharing
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Old 06-30-2015
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Warning! super nice, thanks

I just disagree with the 3rd example, to me is indeed a 2nd degree A-V block type 1. I can see the PR prolonging until one QRS complex disappear.
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Old 04-15-2016
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Default RBBB criteria

Criteria for right bundle branch block (RBBB)
QRS >0,12 sec
Slurred S wave in lead I and V6
RSR'-pattern in V1 where R' > R

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Very Helpful, Thanks a ton
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Old 03-30-2017
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Default best source for ekg

what is the best source fo learning ekgs
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Old 04-19-2017
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Thanks this so helpful
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Old 04-19-2017
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nice work this help a lot thanks for learning ECGs
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