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| − | [[Sino-Atrial Block]]
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| − | [[Atrio-Ventricular Block]]
| + | [[Category:Altered_Impulse_Formations]] |
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| − | ===[[Atrial Standstill]]===
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| − | ===[[Bundle Branch Block]]===
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| − | ===Wolff-Parkinson-White Syndrome (Ventricular Preexcitation Syndrome===
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| − | *This syndrome occurs when the conduction travels from the SA node and then completely bypasses the AV
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| − | node and travels to the bundle of His or the ventricles.
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| − | ====Causes====
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| − | Hypertrophic cardiomyopathy (cats); congenital heart disorders
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| − | '''ECG Appearance:''' Short PR interval; Prolonged QRS complex; Notch in the R wave
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| − | ====Treatment====
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| − | Treatment for tachycardia if necessary: digoxin, quinidine etc.
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| − | ===Sick Sinus Syndrome===
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| − | *This is a blanket term used to describe multiple abnormalities of the SA node involving impulse formation and conduction disturbances.
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| − | ====Causes====
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| − | Myocardial diseases, idiopathic, breed predispositions (e.g. miniature schnauzer)
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| − | '''ECG:''' Variable depending on the specific SA abnormality
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| − | ====Treatment====
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| − | Surgical implantation of a pacemaker; +/- antiarrhythmic treatments[[Category:Altered_Impulse_Formations]]
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