Remove Arrhythmia Remove Echocardiogram Remove Tachycardia
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Torsade in a patient with left bundle branch block: is there a long QT? (And: Left Bundle Pacing).

Dr. Smith's ECG Blog

EKG with paced complexes shown below shows much narrower QRS complex and echocardiogram showed improved LV systolic function primarily due to improvement in LV dyssynchrony. (J Even with tachycardia and a paced QRS duration of ~0.16 J Am Coll Cardiol.

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A teenager involved in a motor vehicle collision with abnormal ECG

Dr. Smith's ECG Blog

The ECG shows sinus tachycardia with RBBB and LAFB, without clear additional superimposed signs of ischemia. Hopefully a repeat echocardiogram will be performed outpatient. The Initial ECG in Today's Case: As per Dr. Meyers — the initial ECG in today's case shows sinus tachycardia with bifascicular block ( = RBBB/LAHB ).

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A man in his 40s with acute chest pain. What do you think?

Dr. Smith's ECG Blog

It's a very "fun" ECG, with initial ectopic atrial tachycardia (negative P waves in inferior leads conducting 1:1 with the QRSs), followed by spontaneous resolution to sinus rhythm. The emergent echocardiogram showed normal EF, no WMA, and normal valve function. What About the Tachycardia? Triage ECG: What do you think?

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60-something with wide complex tachycardia: from where does the rhythm originate?

Dr. Smith's ECG Blog

Here is her ED ECG: Here is the ED physician's interpretation: IMPRESSION UNCERTAIN REGULAR RHYTHM, wide complex tachycardia, likely p-waves. LEFT BUNDLE BRANCH BLOCK [120+ ms QRS DURATION, 80+ ms Q/S IN V1/V2, 85+ ms R IN I/aVL/V5/V6] Comparison Summary: LBBB and tachycardia are new. This is clearly ventricular tachycardia.

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Abstract 4143264: A Case of Spike-on-T Phenomenon and Polymorphic Ventricular Tachycardia

Circulation

This can initiate ventricular arrhythmias like polymorphic ventricular tachycardia (PMVT). Transthoracic echocardiogram showed normal biventricular systolic function. Background:R-on-T phenomenon occurs when an electrical stimulus is delivered at a critical point during ventricular repolarization.

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A woman in her 50s with multiple episodes of syncope

Dr. Smith's ECG Blog

EMS reports intermittent sinus tachycardia and bradycardia secondary to some type of heart block during transport. It is hard to make out P waves but you can see them best in V2, and notches in the T waves in other leads - this is a sinus tachycardia with a very long PR interval indicating first degree block.

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Chest Pain and Inferior ST Elevation.

Dr. Smith's ECG Blog

There is sinus tachycardia. Sinus tachycardia, which exaggerates ST segments and implies that there is another pathology. I have always said that tachycardia should argue against acute MI unless there is cardiogenic shock or 2 simultaneous pathologies. Here is that ECG: What do you think? No wall motion abnormality.