<unk>  (Latin, "agitation of the heart") is an often lethal disruption of heart rhythm that occurs as a result of a blow to the area directly over the heart (the precordial region) at a critical time during the cycle of a heart beat, producing what is termed an R-on-T phenomenon that leads to the condition. It is a form of ventricular fibrillation (V-Fib), not mechanical damage to the heart muscle or surrounding organs, and not the result of heart disease. The fatality rate is about 65 percent even with prompt CPR and defibrillation, and more than 80 percent without.<unk>  occurs mostly in boys and young men (average age 15), usually during sports, most frequently baseball, often despite a chest protector. It is usually caused by a projectile, but can also be caused by the blow of an elbow or other body part. Being less developed, the thorax of an adolescent is likely more prone to this injury given the circumstances. The phenomenon was confirmed experimentally in the 1930s, with research in anaesthetized rabbits, cats and dogs.
Commotio cordis
Grisi siknis
Torus palatinus
Caput Medusae
Dolichonychia
Caput medusae
Pleurothotonus
Epiphora 