John OsborneChief Medical Officer, ClearCardio LLC · Preventive cardiologist and Chief Medical Officer at ClearCardio

Where Plaque Really Builds Up (And Why It's Not Your Heart)

6 Oct 2026 · 1 min

Watch on YouTube

0:43

In this segment, the presenter uses a donut analogy to clarify how atherosclerotic plaque actually forms. Contrary to the common focus on the “donut hole” (the vessel lumen), plaque first accumulates within the vessel wall—the “donut” itself. Cholesterol deposits cause the arterial wall to expand outward (positive remodeling), preserving the lumen size initially. This outward expansion can double the vessel’s outer diameter before any inward narrowing occurs, making early plaque invisible on standard imaging that only assesses lumen size. The explanation challenges the misconception that plaque is primarily a blockage of the lumen and emphasizes the importance of looking at the vessel wall to detect early atherosclerosis.

Chapters

So think of a donut. Historically, we've been worried about the donut hole. Yeah, but that's the last thing to go bad. Plaque begins in the donut, so you really have to spin the vessel around to be able to see that plaque. Another important thing about plaque: plaque always forms in the wall of the vessel. So think of a donut. Historically, we've been worried about the donut hole. Yeah, but that's the last thing to go bad. Plaque begins in the donut, and early on, that cholesterol literally gets deposited in the donut, and the donut. will expand outwards. The hole is the same. There is no change here. There is no blockage, but we couldn't see what's happening in the donut. And the whole vessel can literally expand to about twofold before it starts growing in.