Eyes and ocular appendages (H00-H59).
- Acute glaucoma (glaucoma) – acute elevation of intraocular pressure.
- Optic neuritis (inflammation of the optic nerve).
- Retinal vein thrombosis – formation of a blood clot in vessels of the retina.
Endocrine, nutritional and metabolic diseases (E00-E90).
- Hypoglycemia (low blood sugar).
Cardiovascular system (I00-I99)
- Hypertensive crisis – increase in blood pressure to levels above 230/120 mmHg.
- Intracerebral hemorrhage (ICB; brain hemorrhage) – seen in 1.24% of patients with suspected TIATypical brain hemorrhage symptoms include headache, nausea, lightheadedness, or clouding of consciousness.
- Orthostatic dysregulation – brief dizziness or fainting on change of position due to blood vessel dysfunction.
- Subdural hematoma (SDH) – hematoma (bruise) between the dura mater and the arachnoid (spider membrane; middle meninges between the dura mater (hard meninges; outermost meninges) and the pia mater); symptoms: uncharacteristic complaints such as a feeling of pressure in the head, cephalgia (headache), vertigo (dizziness), restriction or loss of orientation and ability to concentrate
Neoplasms – tumor diseases (C00-D48).
- Brain tumors, unspecified
Ears – mastoid process (H60-H95)
- Meniere’s disease – internal disease with impaired hearing and balance.
Psyche – nervous system (F00-F99; G00-G99)
- Epilepsy – recurrent seizures.
- Increase in intracranial pressure (increased intracranial pressure).
- Hyperventilation syndrome – increased breathing beyond what is required, which can lead to fainting.
- Migraine
- Multiple sclerosis – neurological disease that can lead to paralysis and spasticity.
- Neuritis vestibularis – inflammation of the vestibular nerve.
- Psychiatric disorders, unspecified
- Transient global amnesia – temporally limited memory gap.
Symptoms and abnormal clinical and laboratory findings not elsewhere classified (R00-R99).
- Hyperventilation syndrome – breathing increased beyond requirement that may lead to fainting.
- Syncope – brief loss of consciousness due to an insufficient supply of blood to the brain.
Injuries, poisoning, and other consequences of external causes (S00-T98).
- Subdural hematoma (SDH) – effusion of blood between under the hard meninges (dura mater) and the arachnoid (cobweb) membrane.
