Angiographic appearance of the normal equine foot and alterations in chronic laminitis.
Authors: Ackerman, Garner, Coffman, Clement
Journal: Journal of the American Veterinary Medical Association
Summary
# Editorial Summary: Angiographic Appearance of the Normal Equine Foot and Alterations in Chronic Laminitis Ackerman and colleagues used angiography to establish the normal vascular anatomy of the equine foot and identify how chronic laminitis disrupts these critical blood supply patterns. By comparing radiographic contrast studies of healthy feet with those from chronically laminitic horses, they documented that normal feet display complete filling of the terminal arch with 8–10 main branches (0.1–0.2 cm diameter) and a fine, symmetrical capillary network throughout the hoof corium, whereas laminitic feet show markedly poor terminal arch perfusion, fewer and larger primary vessels, irregular and sparse corium vasculature with apparent avascular zones, and tortuous abnormal vessels in the coronary band corium. These findings provide anatomical evidence that chronic laminitis involves significant vascular compromise rather than merely inflammatory changes, suggesting that therapeutic approaches must address microvascular dysfunction alongside inflammation. For practitioners, this work underscores why chronically laminitic feet may respond poorly to systemic treatments alone and why interventions targeting vascular perfusion and the integrity of the dermal–epidermal junction warrant consideration in long-term management strategies.
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Practical Takeaways
- •Angiographic findings reveal that chronic laminitis fundamentally disrupts the normal microvasculature of the foot; understanding these vascular changes can help inform treatment approaches focused on restoring circulation
- •The presence of avascular areas in chronic laminitis feet suggests compromised tissue perfusion that may explain prolonged healing and recurrent episodes
- •Recognition of abnormal vessel tortuosity and poor arch filling on angiography provides objective diagnostic confirmation of chronic laminitis when clinical signs are ambiguous
Key Findings
- •Normal equine feet show complete terminal arch filling with 8-10 main branches (0.1-0.2 cm diameter) and symmetrical netlike vascular patterns in the hoof corium
- •Chronic laminitis feet demonstrate poor terminal arch filling, larger and fewer primary branches, and irregular vascular patterns
- •Chronic laminitis is associated with areas of apparent avascularity in the hoof corium and irregular, tortuous vessels in the coronary band corium