Human Phenotype Ontology 
Grandparent Node:
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Abnormal echocardiogram (HP:0003116)help
Grandparent Node:
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Left ventricular systolic dysfunction (HP:0025169)help
Parent Node:
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Reduced left ventricular ejection fraction (HP:0012664)help
..Starting node
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Severely reduced left ventricular ejection fraction (HP:0012666)help
Term ID: 12666
Name: Severely reduced left ventricular ejection fraction
Synonym: Severely reduced ejection fraction
Definition: A large reduction in the fraction of blood pumped from the left ventricle with each cardiac cycle. The normal range in adults is at over 50 percent, and a severe reduction is defined as less than 30 percent.
Comments:
Reference: HP:0012666
Genes and Diseases:
 
       Child Nodes:

 Sister Nodes: 
..expandMildly reduced left ventricular ejection fraction (HP:0012663) help
..expandModerately reduced left ventricular ejection fraction (HP:0012665) help


Genes (7) :BAG5 DSG2 GTPBP3 LMOD2 MYH6 PSEN1 TNNI3

Diseases (7) :OMIM:619747 OMIM:612877 ORPHA:444013 OMIM:619897 OMIM:613251 OMIM:613694 OMIM:613286
 

Human Phenotype Ontology(HPO) is developed by the Human Phenotype Ontology Consortium. The version used here is December 15 2022 release.