There is no single term but a good sentance would be "cardiac conductance disorder"
heart block
intercostal muscles - from inter meaning 'between', and costa meaning 'rib'
Diastasis
Costochondritis is inflammation of the muscles in the ribs
rigormortis
Tetany is the medical term meaning inability to relax the muscles.
Colic is the medical term meaning spasm of the visceral muscles.
Contracture or contraction
The medical term for muscles located within an organ is "smooth muscles" or "involuntary muscles." These muscles are responsible for the involuntary movements of internal organs, such as those in the digestive system, blood vessels, and uterus.
Myologist is the term meaning specialist in the study of muscles, but an orthopedist is the typical specialist physician who treats muscle problems.
Tetany is the medical term continuous spasm of muscles; tetany may result from hypocalcemia.
Capsulitis