Definition

1. Noun:
   • The muscle tissue of the heart; adapted to continued rhythmic contraction: "Heart muscle" refers specifically to the specialized muscular tissue that makes up the walls of the heart. It is uniquely structured to contract rhythmically and tirelessly throughout a lifetime to pump blood.

Usage Examples

• Noun:
  • Regular exercise strengthens the heart muscle.
  • The cardiologist explained that the damage was localized to the heart muscle.
  • This condition causes inflammation of the heart muscle.

Advanced Usage

• In medical/biological contexts: The term is used precisely to distinguish this tissue from skeletal or smooth muscle. It is often discussed in relation to its function, health, and diseases.
  • The biopsy confirmed the presence of scar tissue in the heart muscle.
• Figurative use for strength or vitality: While less common, it can be used metaphorically to refer to the core strength or emotional center of something.
  • The volunteers are the heart muscle of this community organization.

Variants and Related Words

• Myocardium (n): The medical/technical term for the heart muscle.
  • The echocardiogram assesses the thickness and movement of the myocardium.
• Cardiac muscle (n): A synonymous scientific term.
  • Cardiac muscle cells are connected by intercalated discs.

Synonyms

• Myocardium: The middle and thickest layer of the heart wall, composed of cardiac muscle.
• Cardiac muscle: Muscle tissue found only in the heart.

Related Phrases

• Heart muscle disease: A general term for conditions affecting the myocardium.
  • Cardiomyopathy is a type of progressive heart muscle disease.
• Heart muscle cell: Also called a cardiomyocyte, the individual contractile cell of the heart.
  • The research focuses on regenerating damaged heart muscle cells.

Related Idioms

Note: There are no common idioms that use the exact phrase "heart muscle." Idioms related to the heart (e.g., "break a heart," "have a heart") refer to emotion or courage, not the anatomical tissue.

Noun

1. the muscle tissue of the heart; adapted to continued rhythmic contraction