cardiac rhythm disease sudden cardiac arrest https://github.com/monarch-initiative/mondo/issues/2419 MONDO:0100511 The sudden loss of all heart activity due to an irregular heart rhythm. MESH:C1720824 MEDGEN:354518 UMLS:C1720824 icd11.foundation:264292672 Change to current cardiac arrthymia parent requested and confirmed as a correct use of is-a by a cardiac expert. (EFO:0004278)