Difference between revisions of "Category:Altered Ventricular Impulse Formations"

From WikiVet English
Jump to navigation Jump to search
Line 8: Line 8:
  
  
===2. Ventricular Premature Complexes (VPCs)===
+
===2. [[Ventricular Premature Complexes]] ===
 
 
*An ectopic beat beginning in the ventricles below the AV node and occurring prematurely in relation the the existing cardiac rhythm.
 
 
 
*Often VPCs are following by a compensatory pause.
 
 
 
 
 
====Causes====
 
Significant myocardial damage to the heart or disease in other systems, Drug reactions, Hypoxia, Anaemia, Electrolyte and acid-base disturbances, etc.
 
 
 
 
 
'''ECG Appearance:''' P waves absent from the QRS complexes associated with the VPCs, wide and abnormal QRS complexes
 
 
 
 
 
====Treatment====
 
 
 
Treatment similar to ventricular tachycardia.
 
  
  

Revision as of 09:45, 2 July 2010

Small Animals: Not as common as atrial abnormalities

Large Animals: Uncommon


1. Ventricular Tachycardia

2. Ventricular Premature Complexes

3. Ventricular Fibrillation

  • Total lack of organized ventricular depolarization causing cardiopulmonary arrest and death.


Causes

Cardiac or systemic pathology, Electrolyte disturbances, Electric Shock, Untreated ventricular tachycardia, Hypoxia etc.


ECG Appearance: Wavy baseline without any sign of an organized P, QRS, or T wave


Treatment

Small Animals

  • Cardiopulmonary resuscitation: electrical defibrillation, open-chest cardiac massage, intratracheal lidocaine


Large Animals

  • Rarely detected in large animals before death
  • There is no treatment for large animals with this condition

4. Ventricular Asystole

  • The complete absence of electrical cardiac activity


====Causes====Cardiac or systemic pathology, Electrolyte disturbances, Electric Shock, Untreated ventricular tachycardia, Hypoxia etc.


ECG Appearance: Flat base line


Treatment

Small Animals

  • Cardiopulmonary resuscitation
  • Epinephrine

5. Escape Rhythms

  • These rhythms occur in an effort to maintain heart function when the SA or AV nodes are not functioning properly. Escape rhythms occur in pacemaker tissue found in the atria, around the AV node, or in the ventricles. These ectopic rhythms occur at a regular, but slower depolarization rate compared to the dominant SA and AV nodal pacemakers.


ECG Appearance: Depending on where the escape rhythms originate, they can appear either as ectopic beats with a normal or totally abnormal shape.


====Treatment==== Do not use antiarrhythmic drugs in the presence of escape rhythms or else you risk death.

Category:Impulse Conduction Abnormalities

Pages in category "Altered Ventricular Impulse Formations"

The following 5 pages are in this category, out of 5 total.