*Note I'm not a nutritionist nor able to make any qualified recommendations, so keep that in mind while reading this. I'd love to hear any corrections to any of the sentences on this page.
Here's some basics for cholesterol: "Good cholesterol" (HDL) takes "bad cholesterol"(LDL) floating in your bloodstream to your liver. It gets digested and then you have less cholesterol sitting in your blood. Lots of cholesterol in your blood increases clot chances, so minimizing this is crucial to avoid those nasty demons called blood clots. That bad thing is that trans fats increase the amount of "bad cholesterol" in your blood and decreases the "good cholesterol" that is trying to get that bad shit digested.
Heart attacks occur when your heart gets no oxygen, which gets delivered as long as blood is flowing to the heart. A blood clot blocks clogs up the blood flow to a part of the body. Sometimes this blockage can be upstream of the heart, which leads to the dreaded heart attack. Once the heart does not have enough oxygen to continue operation, it shuts down (ie. passes out). Now, the "blood pump" is no longer moving blood/oxygen to ANY parts of the body (ie. lungs, hands, stomach, BRAIN, etc.). The brain losing oxygen is the equivalent of ocean waves slowly washing away the writing on the sandy beach. After a long enough time has elapsed, the sandy beach writing is completely erased, and the person does not have a functioning brain anymore.