David Schulte, known as Dazzling Dave, a professional yo-yo performer, experienced a unique medical condition, as depicted in an angiogram taken in 2005. This X-ray image strikingly showed his arteries and veins from wrist to fingertip, but with a notable exception: his right index finger displayed a ghostly white hue, indicating a lack of blood flow.

Schulte’s condition was diagnosed after he observed unusual symptoms in his right index finger. Initially, during his intensive yo-yo performances, which could last 8 to 12 hours a day, he noticed this finger getting colder faster than the others and taking longer to warm up. Subsequently, the finger began turning various colors, including red, blue, and dark purple. This prompted him to seek medical attention, leading to the revealing angiogram.

The diagnosis turned out to be a vasospasm, a sudden constriction of blood vessels, rather than a blood clot as initially suspected. This condition was likely caused by the repetitive impact of the yo-yo on his finger over seven to ten years. In response to his unique case, his doctor prescribed blood thinners, which Schulte took for a month, resulting in the restoration of normal color to his finger.

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Another consequence of his yo-yoing was enlarged blood vessels in his middle finger. This was caused by how tightly he wrapped the yo-yo string around his middle finger which forced blood to stay at the tip of his middle finger.

Schulte’s condition is an example of Raynaud’s syndrome, a disorder where blood flow to extremities is severely reduced due to constricted blood vessels. In severe cases, this can lead to nerve damage or tissue loss. However, Schulte fortunately suffered no lasting damage from his Raynaud’s. While his yo-yo technique remains largely unchanged, he has adjusted his performance style during outdoor shows in cold weather to prevent exacerbating the condition.