A healthy adult lifestyle is less important for fending off heart disease than your childhood, a study has suggested. Around two-thirds of the influence behind one type of coronary artery blockage is due to upbringing and childhood, the study stated, whereas a third is due to adult lifestyle choices, such as smoking. Researchers looked for the main cause of troublesome blockages in coronary arteries, which can cut off the supply of oxygen to the heart muscle. They focused on soft noncalcified pl