Your heart never gets time off for a vacation. Made up of four chambers, your heart is synchronized by nervous system control. The challenges you must overcome to keep your heart in optimal working condition are wear and tear to your heart's structure and its energy producing systems, and stress.

A startling array of new science is showing that the nerve-heart connection is the key to maintaining proper heart rhythms. A common neuropeptide called substance P links cardiovascular function, stress, mood, and inflammation. This opens the ...