| umls-concept:C0018790 | skos:definition | MSH: Cessation of heart beat or MYOCARDIAL CONTRACTION. If it is treated within a few minutes, heart arrest can be reversed in most cases to normal cardiac rhythm and effective circulation.,CSP: cessation of the heart beat.,NCI: The sudden cessation of cardiac activity so that the victim subject/patient becomes unresponsive, without normal breathing and no signs of circulation. Cardiac arrest may be reversed by CPR, and/or defibrillation, cardioversion or cardiac pacing.,MEDLINEPLUS: <p>The heart has an internal electrical system that controls the rhythm of the heartbeat. Problems can cause abnormal heart rhythms, called <a href='http://www.nlm.nih.gov/medlineplus/arrhythmia.html'>arrhythmias</a>. There are many types of arrhythmia. During an arrhythmia, the heart can beat too fast, too slow, or it can stop beating. Sudden cardiac arrest occurs when the heart develops an arrhythmia that causes it to stop beating. This is different than a <a href='http://www.nlm.nih.gov/medlineplus/heartattack.html'>heart atta | lld:umls |
