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VETERINARY CLINICAL CARDIOLOGY
CARDIOLOGY CONCEPTS
Cardiovascular Physiology
Causes of Heart Failure
1. Where is the abnormality?
In the conduction system of the heart:

In the valve system of the heart:

Inadequate Preload:

In the heart muscle:

  • Weakened heart muscle (loss of contractility)
    • Taurine deficiency
    • Tachycardia induced
    • Idiopathic
  • Impaired distensibility/relaxation
    • Concentric hypertrophy
    • Myocardial infiltrate

Infection of the heart:

  • Bacterial, viral, fungal, rickettsial, protozoal, heartworm

Shunting:

  • Left-to-right: volume overload via the recirculation system
  • Right-to-left: unoxygenated blood gains access to the systemic circulation
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