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Congestive Heart Failure - Rabbit (view source)
Revision as of 16:59, 24 September 2011
, 16:59, 24 September 2011no edit summary
Heart diseases implicated include:
Heart diseases implicated include:
:'''cardiomyopathy'''
:[[:Category:Cardiomyopathy|'''cardiomyopathy''']]
:'''valvular insufficiency'''
:'''valvular insufficiency'''
:infectious causes
:infectious causes
:arrhythmia
:[[:Category:Arrhythmias|arrhythmia]]
:Congenital disease
:[[:Category:Cardiovascular System - Developmental Pathology|congenital disease]]
==Clinical Signs==
==Clinical Signs==
==Diagnosis==
==Diagnosis==
If valvular insufficiency is present, a focal '''murmur''' may be heart on thoracic auscultation.
If valvular insufficiency is present, a focal '''murmur''' may be heard on thoracic auscultation.
'''Radiography''' is the best way to diagnose CHF. It may reveal an enlarged heart, pulmonary oedema, pleural effusion.
'''Radiography''' is the best way to diagnose CHF. It may reveal an enlarged heart, pulmonary oedema, pleural effusion. If right-sided failure is present there may be pericardial effusion, ascites, peripheral oedema, hepatomegaly.
If right-sided failure is present there may be pericardial effusion, ascites, peripheral oedema, hepatomegaly.
'''ECG''' may reveal arrhythmias or tachycardia.
'''ECG''' may reveal arrhythmias or tachycardia.
'''Echocardiography''' is important to diagnose the cause of the congestive heart failure, and may reveal valvular insufficiency or cardiomyopathy.
'''Echocardiography''' is important to diagnose the cause of the congestive heart failure, and may reveal valvular insufficiency or cardiomyopathy.
'''Blood pressure measurement''' to diagnose any output failure.
[[Blood Pressure Measurement|'''Blood pressure measurement''']] is used to diagnose any output failure.
==Treatment==
==Treatment==
If the rabbit presents in '''acute failure''', treatment should include:
If the rabbit presents in '''acute failure''', treatment should include:
:'''Oxygen''': in an oxygen tent or via a facemask, minimising stress.
'''Oxygen''': in an oxygen tent or via a facemask, minimising stress.
:'''Diuretics''': frusemide intramuscularly
:'''Glyceryl trinitrate''' ointment to cause vasodilation
'''Diuretics''': frusemide intramuscularly
:'''Thoracocentesis''' if pleural effusion is suspected: drain chest bilaterally placing a butterfly catheter ventrally through the chest wall. Multiple sites should be aspirated.
'''Glyceryl trinitrate''' ointment to cause vasodilation
'''Thoracocentesis''' if pleural effusion is suspected: drain chest bilaterally placing a butterfly catheter ventrally through the chest wall. Multiple sites should be aspirated.
Prognosis is '''poor''' with acute congestive heart failure as rabbits usually present in the later stages of the condition and do not deal well with stressful situations.
Prognosis is '''poor''' with acute congestive heart failure as rabbits usually present in the later stages of the condition and do not deal well with stressful situations.
'''Chronic''' treatment for CHF may include:
'''Chronic''' treatment for CHF may include:
:'''Diuretic''': frusemide orally
:'''ACE-inhibitors''': enalapril or benazepril
:Positive inotrope: '''digoxin'''
Regular '''monitoring''' of electrolytes and biochemistry is important during the course of treatment. Monitoring the rabbit's '''weight and eating habits''' is essential to ensure gut function remains adequate.
Regular '''monitoring''' of electrolytes and biochemistry is important during the course of treatment.
Monitoring the rabbit's '''weight and eating habits''' is essential to ensure gut function remains adequate.
With chronic congestive heart failure, medical management may allow '''survival for months''' before decompensation occurs.
With chronic congestive heart failure, medical management may allow '''survival for months''' before decompensation occurs.
Bourne, D. (2011) '''Congestive Heart Failure in Rabbits''' ''[http://www.wildlifeinformation.org Wildlife Information Twycross Zoo]''
Bourne, D. (2011) '''Congestive Heart Failure in Rabbits''' ''[http://www.wildlifeinformation.org Wildlife Information Twycross Zoo]''
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