Chest pain is not a symptom you should ever ignore, for obvious reasons. Chest pain, as almost anyone knows, may indicate a cardiac problem. For this reason alone, if you have chest pain you should be evaluated by a doctor.
Definition of cardiac muscle. : the principal involuntary-muscle tissue of the vertebrate heart made up of striated fibers joined at usually branched ends and functioning in synchronized rhythmic contraction.
Cardiac muscle is a specialized muscle only found in the heart. It is striated with narrow dark and light bands, similar to skeletal muscle. However, the bands are narrower and much shorter than skeletal muscle. One unique characteristic of cardiac muscle is that it does not fatigue.