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Jan Sloves Impressed With Tarık Taştekin’s Raynard’s Phenomenon Demonstration
Jan Sloves/LinkedIn
Nov 15, 2025, 05:49

Jan Sloves Impressed With Tarık Taştekin’s Raynard’s Phenomenon Demonstration

Jan Sloves, President and Consultant at Vascular Imaging Professionals LLC, reposted Tarık Taştekin’s post on LinkedIn:

“Great demonstration of Raynard’s phenomenon from Tarık Taştekin”

Quoting Tarık Taştekin’s post:

“When the Cold Turns Fingers White

Just a few seconds of cold exposure and the fingertips suddenly lose their color. It may look harmless, even artistic. But what you’re witnessing is a spasm of the small arteries the hallmark of Raynaud’s phenomenon.

In Raynaud’s, cold or emotional stress triggers an exaggerated vasoconstrictive response in digital arterioles, causing a transient reduction in blood flow to the skin.

This leads to a characteristic sequence of color changes:
White (ischemia) – reduced perfusion
Blue (cyanosis) – oxygen deprivation
Red (reactive hyperemia) – reperfusion as vessels dilate again

In this video, as the hand is immersed in warm water, the vessels reopen and oxygenated blood returns a real-time demonstration of microvascular reactivity and the body’s effort to maintain core temperature through peripheral vasospasm.

Raynaud’s phenomenon can be primary (idiopathic) and benign, often seen in young women. However, secondary Raynaud’s may signal underlying systemic disorders such as scleroderma, systemic lupus erythematosus, vasculitis, or thromboangiitis obliterans. Recurrent, painful, or asymmetric attacks should prompt further vascular and rheumatologic evaluation.
What appears to be a simple color change is, in reality, a vivid reflection of vascular physiology in action the body’s fine balance between protection and perfusion.”

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cyanosis exaggerated vasoconstrictive response Health Hematology Hemostasis Hemostasis Today Ischemia Jan Sloves Medicine Raynaud’s phenomenon reactive hyperemia Tarık Taştekin
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