Why, oh why did Dr. Jones schedule an appointment in mid-December? Who has time for that? My heart is fine. As holiday prep time grew shorter, my to-do list grew longer. My peace meter registered closer to frayed-at-the-seams-frantic than to Christmas card-perfect. “This appointment is a waste of time,” I said to my husband. “I have so much to do before Christmas. I need to shop and send cards, and I need to decorate the tree.” My feisty cardiologist had scheduled an echocardiogram, and trust me, no one argues with Dr. Jones. She ordered this test and others…