Intraventricular conduction delay EKG examples: Difference between revisions
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==EKG Examples== | ==EKG Examples== | ||
===Left Bundle Branch Block=== | ===Left Bundle Branch Block=== | ||
Shown below is an EKG with an RsR' pattern (M pattern) in leads [[Electrocardiogram# | Shown below is an EKG with an RsR' pattern (M pattern) in leads [[Electrocardiogram#Limb|III]], [[Electrocardiogram#Augmented limb|aVL]], [[Electrocardiogram#Augmented limb|aVF]], and notching of the [[QRS complex]] in [[Electrocardiogram#Precordial|V5]] depicting a left bundle branch block. [[Wide QRS complexes]] are seen throughout the EKG. | ||
[[File: | [[File:LBBB09.jpg|center|800px]] | ||
Copyleft image obtained courtesy of ECGpedia, http://en.ecgpedia.org/wiki/File: | Copyleft image obtained courtesy of ECGpedia, http://en.ecgpedia.org/wiki/Main_Page | ||
===Right Bundle Branch Block=== | |||
Shown below is an EKG with an rSR' pattern in leads [[Electrocardiogram#Limb|III]], [[Electrocardiogram#Augmented lead|aVR]], [[Electrocardiogram#Augmented lead|aVF]], [[Electrocardiogram#Precordial|V1]], [[Electrocardiogram#Precordial|V2]], and [[Electrocardiogram#Precordial|V3]] depicting a right bundle branch block. | |||
[[File:Right bundle branch block 7 .jpg|center|800px]] | |||
Copyleft image obtained courtesy of ECGpedia, http://en.ecgpedia.org/wiki/Main_Page | |||
===Bifascicular Block=== | ===Bifascicular Block=== | ||
Revision as of 02:42, 11 September 2013
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Intraventricular conduction delay Microchapters |
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Differentiating Intraventricular conduction delay from other Disorders |
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Intraventricular conduction delay EKG examples On the Web |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mugilan Poongkunran M.B.B.S [2]
Overview
A narrow QRS complex requires highly synchronous electrical activation of the ventricular myocardium through the rapidly conducting His-Purkinje system (HPS). and intraventricular conduction delays (IVCDs) affects the morphology or duration, or both, of the QRS complex. These changes can be fixed and present at all heart rates, or they can be transient aberration either tachycardia or bradycardia dependent.
EKG Examples
Left Bundle Branch Block
Shown below is an EKG with an RsR' pattern (M pattern) in leads III, aVL, aVF, and notching of the QRS complex in V5 depicting a left bundle branch block. Wide QRS complexes are seen throughout the EKG.
Copyleft image obtained courtesy of ECGpedia, http://en.ecgpedia.org/wiki/Main_Page
Right Bundle Branch Block
Shown below is an EKG with an rSR' pattern in leads III, aVR, aVF, V1, V2, and V3 depicting a right bundle branch block.
Copyleft image obtained courtesy of ECGpedia, http://en.ecgpedia.org/wiki/Main_Page
Bifascicular Block
Shown below is an EKG depicting atrial fibrillation with a controlled ventricular rate. The QRS is wide (>120ms) and has a tall R' inV1 and an S wave in V6. There is a left axis deviation. The cardiogram suggests a right bundle branch block and a left anterior hemiblock. The patient has a cardiomyopathy with an ejection fraction of 20%.
Copyleft image obtained courtesy of ECGpedia, http://en.ecgpedia.org/wiki/File:E243.jpg
