100% false. That's like saying that swallowing ice cubes will cause an iceberg to form in your stomach.<br />
This is a myth that came about because pouring cold water down a sink after you've poured grease down it can clog your pipes, so someone instantly said "omg, humans have 'plumbing', right? So the same thing will happen to us!!"<br />
What they failed to take into account is the fact that human beings are not sinks. The body is warm, and liquids will raise to your internal temperature quite easily and quickly once consumed.<br />
Moreover, arteries are in your heart, not your stomach. Food is digested before it enters your blood stream. It would have long since warmed to match your internal temperature before it got to that point. You would have to be directly pumping the cold beverage into your veins in order for this statement to even begin making sense, and even then it still falls very, very flat because it would still heat up quickly. Besides, if you have enough cholesterol in your arteries that you have to worry about it hardening from a mild chill, you have bigger problems on your hands.
Hopefully it's a wives' tale, or I should have arteries of steel by now.
Fiction! But is sure sounds like a good one to pass along as fact.
Fiction, unless it is something like a milk shake and in that case it is the heavy dose of saturated fat that can harden your arteries. But nothing having to do with the temperature of your food or drink.