heart muscle

fibroid h., a heart affected with a chronic myocarditis in which fibrous ti ue is developed within the muscular ti ue of the organ. frosted h., a condition in which the pericardium is thickened, giving the heart the appearance of being frosted like a cake. goiter h., disturbance of the muscular action of the heart due to pre ure of a goiter on the veins of the neck and on the trachea. hai h., a heart covered with a shaggy exudation. icing h., pericarditis which appears postmortem like the icing on a cake. irritable h., a disorder of the heart characterized by palpitation, shortne of breath, and cardiac pain after slight exertion or excitement. left h., the left auricle and ventricle; that portion of the heart which propels the blood in the systemic circulation. lux us h., dilatation of the left ventricle of the heart, conjoined with hypertrophy. tary h., irritable heart in soldiers. pendulous h. See drop h. pulmonary Ὦ. Same as right hk. Quain’s fatty h., a fatty degeneration of the heart muscle. ht h., the right auricle and ventricle; that portion of the heart which is concerned in the pulmonary circulation. scarlet fever h. See myocarditis scar latinos a. soldier’s h., a form of heart disease somewhat prevalent in armies, generally due to overexercise and exposure. sy8- temic h., the left auricle and ventricle. tabby-cat h., a condition of the heart in which the inner surface of the ventricular wall and the papillary muscles are streaked and spotted: seen in marked cases of fatty degeneration. Called also thrush-breast kh. and tiger tilly kh. thrush breast h. See tabby-cat h. tiger h., tigerlilly h. Same as (fabby-cat h. tobacco h., a heart showing irregularity of action due to exce ive use of tobacco. Ttibingen h., dilatation and hypertrophy of the heart from exce ive beer-drinking. wande: h., an abnormally movable heart. heart-block (hart-blok). The condition in which the muscular interconnection between the auricle and ventricle (auriculoventricular band or band of His) is interrupted, so that the auricle and ventricle beat independently of each other. The condition is marked by permanent or paroxysmal bradycardia, epileptiform, vertiginous, or syncopal attacks, and pulsations of the cervical veins exceeding in rate those of the arteries. The condition is known as Adams-Stokes’ disease. atrioventricular Ὦ. Same as auriculoventricular hk. auriculoventricular h., a form in which the blocking is at the auriculoventricular junction. dextauriculoseptolevauricular h., a form in which the blocking is at the line of union of the right auricle with the left auricle plus the inter auricular septum. intraventricular h., a form in which one ventricle contracts without the other. septodextauriculolevauricular h., a form in which the blocking is at the line of union of the right auricle plus the inter auricular septum with the left auricle. sino-auricular h., a form in which the blocking is located between the auricles and the mouths of the great veins and coronary sinus. heart-burn (hart’burn). the esophagus; cardialgia. heart-failure (hart’-fal-yer). ce ation of the heart’s action. heart-hurry (hart’hur-e). Extreme rapidity of the pulse, a form of tachycardia. heart-water disease. See hemoglobinuria of sheep. heat (hét) [L. ca’lor]._ 1. A form of kinetic energy communicable from one body to another, and appreciable by the thermal sense. 2. Sexual ardor of animals. atomic h., the amount of heat required to raise an atom from 0° to 1° C. latent h., that which apparently disappears when it is absorbed by bodies which are not thereby rendered warmer; the heat which a body may absorb with- A burning sensation in Sudden and fatal 422 HEDIOSIT out changing its temperature. molecular h., the product of the molecular weight of a substance multiplied by its specific heat. prickly h., lichen tropic us, or other itching affection of the skin caused by heat. radiant h., heat given off from any body and pa ing through space in the form of waves. sensible h., the heat which, when absorbed by a body, produces a rise in temperature. specific h., the amount of heat needed to raise the unit-volume of any substance through °C. h.-unit, a calorie.