Palpitations are feelings or sensations that your heart is pounding or racing. They can be felt in your chest, throat, or neck.| medlineplus.gov
Spinal fusion is surgery to permanently join together two or more bones in the spine so there is no movement between them. These bones are called vertebrae.| medlineplus.gov
Low back pain refers to pain that you feel in your lower back. You may also have back stiffness, decreased movement of the lower back, and difficulty standing straight.| medlineplus.gov