Duhaime's Law Dictionary

Myocardium Definition:

The cardiac muscle at the middle layer of the heart.

Related Terms: Heart Attack, Myocardial Infarction, Infarction

The Stedman's Medical Dictionary defines myocardium as:

"The middle layer of the heart, consisting of cardiac muscle."

The Attorney's Dictionary of Medicine:

"The muscle tissue which form the wall (or most of the wall) of the heart; the heart muscle.

"The heart may be envisioned as a rubber ball having thick walls. The interior of the ball is lined with a thin membrane, called endocardium. The exterior of the ball (or heart) is covered with another membrane called pericardium. In this analogy, the stout rubber wall correspdonds to the myocardium."


  • Duhaime, Lloyd, Legal Definition of Myocardial Infarction
  • Pugh, M., Stedman's Medical Dictionary, 27th Ed. (Philadelphia: Lippincott Williams & Wilkins, 2000), page 1173.
  • Schmidt, J.E., Attorney's Dictionary of Medicine and Word Finder, Volume 4 (LexisNexis, 2001)

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