A prominent Carotid pulse
Most people have a visible Carotid pulse (neck pulse). Zoe however, has a quite prominent one.
Quite obviously, this is usually seen with thin persons (their carotid artery is near the skin surface). But the phenomenon is also more prominent with people who have a more significant variability in blood pressure.
In few cases, a prominent Carotid artery is caused by aneurysm (bulging or ballooning in the wall of a blood vessel. It is caused when a portion of the artery wall weakens.), which means that it has a bend or loop in it which makes the pulse instantly more visible. Not Zoe’s problem luckily.