| IOH | idiopathic orthostatic hypotension |
|---|---|
| OCSI | orthostatic change in shock index |
| OP | occipitoparietal; occipitoposterior; occiput posterior; octapeptide; olfactory peduncle; opening pre... |
| SOH | sympathetic orthostatic hypotension |
| AMI | acquired monosaccharide intolerance; acute myocardial infarction; amitriptyline; anterior myocardial... |