February gets a lot of attention as National Heart Healthy Month, but the echocardiography lab at the hospital is a busy place all year long. In fact, the demand is so high some testing is done seven days a week, according to Michele Hughes, a clinical specialist in cardiology at the lab. Echocardiographs use sound waves to produce images that show doctors what Hughes described as “the geography of the heart.” She said the lab does about 3,000 of the tests annually, plus about 2,800 stress echocardiograms that measure blood flow during exercise. Dr. Ryan Smith, who is board certified …