blockage. and then when the block is identified, a tiny guide wire is placed, then a balloon and a stent is advanced across the blockage and then inflate under high pressure to essentially press the plaque aside. dr. lieberman, appreciate it. thanks for coming in. appreciate your time and the explanation. heart health is also the focus of today s fit nation report. some valentine s treats like dark chocolate and strawberries can be good for your heart. detallies from our chief medical correspondent, dr. sanjay gupta. reporter: it is heart health month. time to cut through all the clutter about what s really good for your heart. the biggest key, says registered diet takes paige love, is reducing the levels of inflammatory compounds in your body. inflammation is the body s response when disease is cultivating, and often there are foods that can actually help do the opposite of that in the body. reporter: so what are these super foods? eating red really helps to