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 one of the three major types of muscle, the others being skeletal and smooth muscle. It is an involuntary, striated muscle that is found in the walls of the heart. This muscle tissue is known as myocardium, and forms a thick middle layer between the outer layer of the heart wall and the inner layer. Myocardium is composed of individual heart muscle cells joined together by intercalated disks, encased by collagen fibres and other substances forming the extracellular matrix. Card