When you're filling up at the gas station, have you ever wondered how the gas pump knows when to shut off? Hint: It's not ...

Put simply: if you take a “T” shaped pipe and pass a fluid (such as air or water) through the straight section, a vacuum will be created on the shorter side due to the Venturi effect.

The Venturi effect is described as a decrease in pressure when blood flows through a stenosis at a high velocity. This relates to the hemodynamics in hypertrophic obstructive cardiomyopathy (HOCM).