Concentration of cardiac troponin I in a horse with a ruptured aortic regurgitation jet lesion and ventricular tachycardia

18-year-old Thoroughbred gelding with sudden onset of ventricular tachycardia and signs of colic, and a history of a diastolic decrescendo murmur consistent with aortic regurgitation

Measurement of serum cardiac troponin I (cTnI) and cardiac ultrasonography

Clinically normal horses (for cTnI comparison)

Serum concentrations of cardiac troponin I (cTnI) and necropsy findingssurrogate