The specialized striated muscle tissue of the heart; the myocardium.
American Heritage Medicine
Other Word Forms of Cardiac Muscle
Cardiac Muscle Sentence Examples
Units of the sarcoplasmic reticulum surround the contractile fibrils in the interior of cardiac muscle cells.
The systole is not altered in length, but the diastole is very much prolonged, and since this is the period not only of cardiac rest but also of cardiac "feeding" - the coronary vessels being compressed and occluded during systole - the result is greatly to benefit the nutrition of the cardiac muscle.
Thereafter follows the most important effect of the drug, which is a direct stimulation of the cardiac muscle.
This can be proved to occur in a heart so embryonic that no nerves can be recognized in it, and in portions of cardiac muscle that contain neither nervecells nor nerve-fibres.
The arrival of an action potential in the interior of the cardiac muscle cell causes the release of calcium ions from the sarcoplasmic reticulum.