Okay here buddy I will break it down for you. First if you have a heart condition and it is serious you prob should not be taken any illegal or legal drugs. Second, shrooms on the heart, my heart beats pretty hard on them. Usually the effects of shroom is an intense body high with some visuals both close eyed and open eyed. Open eyed visuals usually range from depth preception (floor maybe be wavey or designs maybe a little 3d), this also can range from people to people. I usually get some waveyness, some 3d on patterns but nothing too intense, and a few trails. Closed on visuals are better, when you close your eyes you get some crazy trails, some crazy lights flashing, but nothing like acid. To make these more intense drink anything with Vitamin C.
How Shrooms work, you are actually poisening your body with a drug (no shit right) which you causes your to have a fever. Hence when some people on shrooms say ahh man I am getting the fever. You will not feel the effects until about 40 mins in your trip. Oh yeah shrooms taste horrible use peanut butter or pizza or something to hide the taste. You will peak about 2 hours or maybe a little less into your trip. Peaking is when the trip is at its highest. The peak will last anywhere from 1 to 3 hours (most will last for like 2 half hours). You will start coming down, the intense body high will wear off and you will feel a little tired. This is when weed is great. Or drinking
Oh yes I almost forgot, Shrooms make you laugh alot which is always fun. The next day after you come down you are going to have the worest shits. Hope this helps, sorry for the grammer errors and what not I am too lazy to re read this over.