Intraventricular block

Medical condition
Intraventricular block
ECG characteristics of an intraventricular block subtype - RBBB showing wide QRS complexes with a terminal R wave in lead V1 and a prolonged S wave in lead V6.
SpecialtyCardiology
Diagnostic methodelectrocardiogram

An intraventricular block is a heart conduction disorder — heart block of the ventricles of the heart.[1] An example is a right bundle branch block, right fascicular block, bifascicular block, trifascicular block.[2][3]

Types

Types of intraventricular blocks are[4]

Intraventricular conduction delay

Intraventricular conduction delay seen in precordial/chest leads with QRS duration 100 ms. An EKG of a 25-year-old male.

Intraventricular conduction delays (IVCD) are conduction disorders seen in intraventricular propagation of supraventricular impulses resulting in changes in the QRS complex duration or morphology, or both. IVCD can be caused by abnormalities in the structures of bundle of His, Purkinje fibers or ventricular myocardium.[5][6] Nonspecific intraventricular conduction delay (NICD) is a delay with widened QRS complex but without a specific intraventricular block present.[7]

References

  1. ^ "Intraventricular Conduction - ECGpedia". en.ecgpedia.org. Retrieved 2021-10-17.
  2. ^ "Lesson VI - ECG Conduction Abnormalities". Retrieved 2009-01-07.
  3. ^ "ICD-10 Version:2019". icd.who.int. Retrieved 2021-10-17.
  4. ^ "Intraventricular Blocks". empendium.com. Retrieved 2021-10-17.
  5. ^ "Intraventricular conduction delay: bundle branch blocks & fascicular blocks". ECG & ECHO. Retrieved 2021-10-17.
  6. ^ "Intraventricular conduction delay overview - wikidoc". www.wikidoc.org. Retrieved 2021-10-17.
  7. ^ "Nonspecific intraventricular conduction delay (defect)". ECG & ECHO. Retrieved 2021-11-01.

Further reading

  • Stock RJ (August 1971). "Clinical significance of intraventricular block in acute myocardial infarction". Bull N Y Acad Med. 47 (8): 987–98. PMC 1750154. PMID 5284231.

External links

  • Intraventricular conduction delay overview at Wikidoc
  • Conduction defects at ECGWaves
  • Nonspecific intraventricular conduction delay (NSIVCD) at ECGWaves
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Cardiovascular disease (heart)
Ischemia
Coronary disease
Active ischemia
Sequelae
Layers
Pericardium
Myocardium
Endocardium /
valves
Endocarditis
Valves
Conduction /
arrhythmia
Bradycardia
Tachycardia
(paroxysmal and sinus)
Supraventricular
Ventricular
Premature contraction
Pre-excitation syndrome
Flutter / fibrillation
Pacemaker
Long QT syndrome
Cardiac arrest
Other / ungrouped
CardiomegalyOther