Myocardium is the medical term meaning heart muscle. Cardiac Muscle.   Cardiac muscle   Answer   Cardiac Muscle; there are only three types of muscles, cardiac ~ … heart, smooth ~ intestines, stomach, etc, and skeletal =~the ones you use on your arms or legs; muscles attached to bones.yorrhaphy is the surgical suturing of a muscle wound (my/o means  muscle and-rrhaphy means surgical suturing).