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Ontology Browser
Term:
Parent Terms Term With Siblings Child Terms
Abnormal cardiac atrial physiology +   
Abnormal cardiac ventricular function +   
Abnormal fetal cardiovascular physiology +   
Abnormal heart sound +   
Abnormal heart valve physiology +   
Abnormal systemic blood pressure +   
Abnormal vascular physiology +   
Abnormality of blood circulation +   
Abnormality of cardiovascular system electrophysiology +   
Acute coronary syndrome +   
Angina pectoris  
Cardiac tamponade 
Chronotropic incompetence  
Congestive heart failure +   
Failure to elevate ammonia on ischemic exercise  
Failure to increase oxygen saturation on hyperoxia test 
Presyncope  
Reduced systolic function +   
Shock +   
Syncope +   
Syncope is a syndrome in which loss of consciousness is of relatively sudden onset, temporary (usually less than 1 to 2 minutes), self-terminating, and of usually rapid recovery. Syncope leads to a generalized weakness of muscles with loss of postural tone, inability to stand upright, and loss of consciousness. Once the patient is in a horizontal position, blood flow to the brain is no longer hindered by gravitation and consciousness is regained. Unconsciousness usually lasts for seconds to minutes. Headache and drowsiness (which usually follow seizures) do not follow a syncopal attack. Syncope results from a sudden impairment of brain metabolism usually due to a reduction in cerebral blood flow.

Synonyms
Exact Synonyms: Fainting spell
Xrefs: MESH:D013575 ;   SNOMEDCT_US:271594007 ;   SNOMEDCT_US:272030005 ;   SNOMEDCT_US:309585006 ;   UMLS:C0039070
Definition Sources: https://orcid.org/0000-0002-0736-9199, PMID:29255499

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