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Differential diagnosis of collapse in the dog
  1. Jon Wray

    Jon Wray graduated from Bristol in 1996. After two years in mixed practice in Bath, he returned to Bristol to complete a residency in small animal medicine. In 2001, he joined Willows Referral Service in Solihull where he helped to develop an expanding referral caseload in internal medicine and provided medical support for other referral disciplines. In 2004, he joined the Animal Health Trust in Newmarket to establish a referral service in canine internal medicine. He holds the RCVS certificate in small animal medicine and is currently studying for the RCVS diploma in small animal medicine.

1. Aetiology and investigation


COLLAPSE is a challenging clinical sign to investigate in dogs due to the very large number of potential causes. It may occur acutely, episodically or may be the end result of more chronic debilitation associated with one or more of a wide variety of critical illnesses. This article, the first in a series of three, reviews the mechanisms by which acute or episodic collapse may occur in the dog and outlines an approach to the investigation of collapse. Part 2, to be published in the February issue of In Practice, will discuss neuromuscular causes of acute or episodic collapse, while Part 3, to be published in the March issue, will describe cardiovascular and other miscellaneous causes of collapse.

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