ecg understanding accelerated conduction l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
ECG: UNDERSTANDING ACCELERATED CONDUCTION PowerPoint Presentation
Download Presentation
ECG: UNDERSTANDING ACCELERATED CONDUCTION

Loading in 2 Seconds...

play fullscreen
1 / 13

ECG: UNDERSTANDING ACCELERATED CONDUCTION - PowerPoint PPT Presentation


  • 860 Views
  • Uploaded on

ECG: UNDERSTANDING ACCELERATED CONDUCTION. Dr. Krishnendu Maity BHMS [Calcutta] MD (Hom. Repertory) [Pune] Professor & HOD, Dept. of Medicine Teaching Medicine, Materia & Repertory Lal Bahadur Shastri Homœopathic Medical College, Bhopal – 26 (MP) Email : post.krishnendu2010@ymail.com.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'ECG: UNDERSTANDING ACCELERATED CONDUCTION' - Faraday


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
ecg understanding accelerated conduction

ECG: UNDERSTANDING ACCELERATED CONDUCTION

Dr. Krishnendu Maity

BHMS [Calcutta] MD (Hom. Repertory) [Pune]

Professor & HOD, Dept. of Medicine

Teaching Medicine, Materia & Repertory

Lal Bahadur Shastri Homœopathic Medical College, Bhopal – 26 (MP)

Email: post.krishnendu2010@ymail.com

introduction
INTRODUCTION

There are 02 types of accelerated conductions from the atrium to the ventricles; viz.

  • Wolff-Parkinson-White (WPW) Syndrome / Pre-excitation Syndrome.
  • Lown-Ganong-Levine (LGL) Syndrome.
wpw syndrome
WPW SYNDROME
  • Bundle of Kent by-pass the AV node or by Mahaim fibes – which goes from Bundle of His to Ventricular Septum. The pre-excitation of ‘Bundle of Kent’ is called WPW Syndrome.
  • The atrial impulse passes through the normal path of conduction and also through the anterior intra-nodal fibre [Bachmann’s fibre / Bundle of Kent], simultaneously.
classification of wpw syndrome
CLASSIFICATION OF WPW SYNDROME

WPW Syndrome is of 02 types ----

  • Type A: where excitation travels along Left accessory pathway – giving rise to RVH / RBBB.
  • Type B: where excitation travels along Right lateral accessory pathways – giving rise to LBBB. If it is associated with Cyanotic CHD – Ebstein’s Anomaly is diagnosed.
ecg of wpw syndrome
Short P-R interval [less than 0.12 sec.].

Wide QRS complex.

Appearance of -wave / slurred upstroke of QRS.

Normal P-wave axis.

ECG OF WPW Syndrome
causes of wpw syndrome
CAUSES OF WPW Syndrome
  • Normal individuals.
  • Myocardial Infarction.
  • Acute Rheumatic Fever.
  • CHD – Ebstein’s Anomaly.
  • Cardiac catheterization / Surgical manipulation of Heart.
  • Hypertrophic Sub-aortic Stenosis.
  • Idiopathic Cardiomyopathy.
  • Thyrotoxicosis.
wpw syndrome with atrial fibrillation
Irregularly irregular, wide complex tachycardia.

Impulses from the atria are conducted to the ventricles via either

both the AV node and Accessory pathway producing a broad fusion complex.

or just AV node producing a narrow complex (without -wave).

or just Accessory pathway producing a very broad 'pure' - wave.

People who develop this rhythm and have very short R-R intervals are at higher risk of VF.

WPW SYNDROME WITH ATRIAL FIBRILLATION
lgl syndrome
LGL Syndrome
  • James Accesory Tract / Bundle of James by-pass the upper part of the AV node. The pre-excitation of the ‘Bundle of James’ is called LGL Syndrome.
  • The artrial impulse preferentially passes through the posterior intra-nodal fibre [Thorel’s fibre / Bundle of James] and conducted to His Bundle.
  • Pateints of this syndrome are prone to develop Supra-ventricular arrhythmias, ventricular tachycardia & Ventricular fibrillation.
ecg of lgl syndrome
Short P-R interval.

Normal QRS complex.

Normal T-wave.

No -wave.

ECG OF LGL Syndrome
references
REFERENCES
  • Das, Dr. P. C. – Textbook of Medicine [Reprint April, 1995; Current Book International].
  • Ganong, Dr. William F. – Review of Medical Physiology (22ND edition, 2005; McGraw Hill).
  • Mehta, Dr. P. J. – Understanding ECG [Reprint 6TH edition, 2008; The National Book Depot].