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Syncope 1451.e1

Syncope
VetBooks.ir Patient presented for evaluation of syncope

Cardiac disease No cardiac disease

Period of cessation Increased Obstructive Obstruction Decreased Metabolic Overexertion
of heartbeat not heart rate lesion to cerebral blood
responsive to blood flow pressure
atropine • Hypoglycemia
• Anemia

Cough Decreased Decreased
• Sinus node • Ventricular • Subaortic syncope cardiac peripheral
dysfunction/sick tachycardia/flutter stenosis output vascular Drug-induced
sinus syndrome • Supraventricular • Pulmonic resistance
• High-grade tachycardia stenosis
second-degree • Pulmonary
atrioventricular hypertension Sinus arrest or Decreased
atrioventricular
block including block responsive stroke volume
• Third-degree heartworm to atropine
atrioventricular disease (vagally induced) • Hypovolemia Increased
block • Hypertrophic • Cardiac vagal tone
• Atrial cardiomyopathy tamponade
standstill • Intracardiac • Idiopathic
neoplasia • Mechanoreceptor
or thrombus stimulation
• Respiratory • Mechanoreceptor
or abdominal stimulation
disease • Idiopathic
• Carotid sinus
hypersensitivity
(Modified from Kittleson MD, Kienle RD: Small animal cardiovascular medicine. St. Louis, 1999, Mosby.)

Clinical Algorithms

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