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| − | ===1. Supraventricular Tachycardia=== | + | ===1. [[Supraventricular Tachycardia]]=== |
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| − | Small Animal: Common
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| − | Large Animal: Uncommon
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| − | a. '''Paroxysmal Atrial Tachycardia (PAT)='''regular rapid atrial contractions arising from atrial tissue outside the SA node
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| − | b. '''Atrioventricular Junctional Tachycardia (AJT)='''regular rapid atrial contractions arising from AV nodal tissue
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| − | c. '''Supraventricular Tachycardia''' a term used to include both PAT and AJT. Rapid premature beats occuring somewhere above the ventricles.
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| − | ====Causes====
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| − | Result from pathological conditions in the cardiac atria, hypoxia, stress, digitalis toxicity, systemic hypertension etc.
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| − | '''ECG Appearance:''' Rapid heart rate, abnormal P wave (inverted) which can be preceded, be superimposed, or follow QRS complexes
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| − | ====Treatment====
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| − | '''Small Animals'''
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| − | *Treat underlying cause
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| − | *Vagal manoeuvres (e.g. carotid sinus or ocular massage)
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| − | *Drug Treatment:
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| − | -If + for congestive heart failure treat with digoxin and other heart failure drugs
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| − | -If - for congestive heart failure treat with diltiazem, propranolol, or adenosine
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| − | *Avoid digoxin if a reentry mechanism is suspect in causing the supraventricular tachycardia
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| − | *Pacing methods
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| − | '''Large Animals'''
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| − | *Treat underlying cause
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| − | *Box rest with heart rate and rhythm monitoring
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| − | *If + for heart failure, give digoxin
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| − | *Vagal manoeuvres (e.g. carotid sinus or ocular massage)
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| − | *Quinidine sulfate
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| | ===2. Supraventricular Premature Complexes=== | | ===2. Supraventricular Premature Complexes=== |