Carolyn Dickens, 76, was sitting at her dining room table, struggling to catch her breath as her physician looked on with concern. “What’s going on with your breathing?” asked Peter Gliatto, director of Mount Sinai’s Visiting Doctors Program. “I don’t know,” she answered, so softly it was hard to hear. “Going from here to the bathroom or the door, I get really winded. I don’t know when…