Abstract
1. Animals for the study of congestive heart failure (HF) should have chronic, stable disease produced by methods which allow controllable damage and hence predictable disease severity. 2. Pressure and volume loading have commonly been used in the past but these methods are limited by the difficulty of controlling the disease severity. 3. HF induced by cardiotoxic agents, particularly doxorubicin, has been widely used for experimental purposes, but again, control of the degree of damage may be difficult. 4. Coronary artery ligation or occlusion produces heart failure in experimental animals, with clear clinical relevance. Disadvantages of such techniques include fatal arrhythmias and collateral vessel growth that prevents or slows the onset of HF. 5. A minimally invasive model of HF which is relatively controllable can be produced by repeated or single DC shocks across the left ventricle. 6. Chronic rapid ventricular pacing produces a technically simple, predictable, stable and controllable preparation of HF with neurohumoral and haemodynamic changes which mimic the clinical pattern. These changes are reversible in the short term but after pacing for 1 year or longer complete recovery does not occur after cessation of pacing. 7...Continue Reading
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