Canine Thrombotic Disease Study Guide

Overview and Clinical Importance

Thrombotic disease in dogs represents a significant clinical challenge and is an important topic for the NAVLE examination. Unlike cats, where aortic thromboembolism (ATE) is predominantly cardiogenic in origin, canine thrombotic disease is typically associated with systemic hypercoagulable states and involves in situ thrombus formation rather than embolization from cardiac sources. This fundamental difference in pathophysiology impacts presentation, diagnosis, and management strategies.

Aortic thrombosis (ATh) and pulmonary thromboembolism (PTE) represent the two most clinically significant single-site thrombotic conditions in dogs. Understanding the underlying pathophysiology, recognizing clinical presentations, and implementing appropriate diagnostic and therapeutic strategies are essential competencies for veterinary practitioners.

Pathophysiology of Thrombosis

Virchow's Triad

The foundation of understanding thrombotic disease lies in Virchow's triad, which describes the three primary factors that predispose to pathological thrombus formation: