Clinical Definition Myocardial infarction, commonly called a heart attack, usually occurs when a coronary artery becomes blocked. Coronary arteries form a network of blood vessels that surround the heart and nourish it with oxygen-rich blood, which is crucial for the heart muscle to function effectively. In Our Own Words Myocardial infarction, or heart attack, happens…
Myocardium
Clinical Definition The myocardium is the thick middle layer of cardiac tissue, sandwiched between the epicardium and endocardium. In Our Own Words The myocardium is the heart’s thick muscular middle layer, located between the outer layer (i.e., epicardium) and the inner layer (i.e., endocardium). The myocardium is made up of highly specialized heart muscle cells…
Myopia
Clinical Definition Myopia is a refractive error, with incoming light focusing in front of the retina, rather than directly on the retina, resulting in blurred vision with objects at a distance, but not close up. Myopia runs in families, with the typical onset in childhood. Myopia progresses with age, but typically plateaus. Eyeglasses, contact lenses…