part_of part of part of has_disease_location heart sudden cardiac arrest true sudden cardiac death MedDRA:10049418 MESH:D016757 OMIM:115080 Change to current cardiac arrthymia parent requested and confirmed as a correct use of is-a by James Ware, cardiac expert. OMIM:617223 death, sudden, cardiac SNOMEDCT:95281009 Dani Welter OMIM:617222 Unexpected rapid natural death due to cardiovascular collapse within one hour of initial symptoms. It is usually caused by the worsening of existing heart diseases. The sudden onset of symptoms, such as CHEST PAIN and CARDIAC ARRHYTHMIAS, particularly VENTRICULAR TACHYCARDIA, can lead to the loss of consciousness and cardiac arrest followed by biological death. (from Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 7th ed., 2005) NCIt:C50911 cardiac arrest