BTW, you have 2 outbound cardiac arteries and 2 inbound......2 of which are actually veins by definition. Which is why you have a Systolic & Diastolic blood pressure. The pressure of the blood is greatest in the larger arteries, which is why you can bleed to death in 1 minute if your Abdominal aorta is torn or with in a couple minutes if the carotid artery is severed. The blood pressure drop alone will make you pass out almost instantly. Humans cannot bleed to death from a torn arteriole (smaller artery) I don't want to get into a debate about pressure gradients, hydrodynamics, etc. I am concerned with what MODERN MEDICINE and PHARMA tells us is bad or unhealthy, just to push pharmaceuticals on us. Your theory above about "stuff" being filtered before it reaches the veins is also not true. When you get blood drawn for tests, where do you think it comes from? Ah Ha! a vein. These levels are measured from your veins. In theory, going by what a venous measurement tells us.....the Pulmonary artery or vena cava would produce the largest numbers of heart attacks due to clogging. BUT.....the Coronary artery produces the largest number of heart attacks due to clogging and the coronary artery has the highest pressure of the whole body. These clogs are not comprised of fat.