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standstill is a rare cardiac rhythm disease with a few familial and sporadic cases described to date that is characterized by a transient or permanent absence of electrical and mechanical atrial activity. Electrocardiographic findings include bradycardia, ectopic supraventricular rhythms, lack of atrial excitability and absent P waves. [Orphanet:1344]","descendants":["MONDO:0007171","MONDO:0014329"],"label":"atrial standstill","mondo":"MONDO:0015281","parents":["MONDO:0016340"],"synonym":{"exact":["atrial cardiomyopathy with heart block"]},"xrefs":{"gard":["0016564"],"icd11":["foundation:483869734"],"icd9":["426.6"],"medgen":["639047"],"mesh":["C563984"],"orphanet":["1344"],"sctid":["450919004"],"umls":["C0541782"]}},"original_id":"orphanet:1344","umls":{"_license":"https://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/license_agreement.html","snomed":{"non-preferred":"450919004","preferred":"450919004"},"umls":"C0541782"}}