Feasible induction of coronary artery vasospasm occurred during cardiac catheterization in a microminipig

The Journal of Veterinary Medical Science
Suchitra MatsukuraAtsushi Sugiyama

Abstract

A 14 month-old intact microminipig, weighing 8 kg, showed ST-segment elevation in A-B lead electrocardiogram during cardiac catheterization followed by ventricular tachycardia, which degenerated into ventricular fibrillation. Although a direct current defibrillation of 360 J was applied, ventricular tachycardia re-occurred for another 2 times and the direct defibrillation was repeated. After returning to normal sinus rhythm, a marked ST-segment elevation was still observed on leads II, III and aVF together with a remarkable decrease in contractility of inferior wall. The heart was excised for precise macroscopic and histological examinations, but there was no dissection, embolus or thrombus in the coronary arteries. These findings suggest that right coronary artery vasospasm could have caused the ischemic attack, leading to lethal arrhythmias.

References

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Nov 7, 2006·Journal of Animal Science·J L Salak-Johnson, J J McGlone
Oct 1, 2009·Netherlands Heart Journal : Monthly Journal of the Netherlands Society of Cardiology and the Netherlands Heart Foundation·C Camaro, W R M Aengevaeren
Mar 29, 2011·Veterinary Pathology·M M SwindleK S Frazier
Dec 4, 2012·Interactive Cardiovascular and Thoracic Surgery·Maria MunzArtur P Águas

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