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| Lightheadedness | |
|---|---|
| Other names | Pre-syncope |
| Specialty | |
| Symptoms | Feeling faint; feeling as though their head is weightless; perceiving the room as spinning (vertigo) |
| Duration | Momentary, although recurring for some patients |
| Causes | Hypotension, hypoglycaemia, arrythmia, anaemia, hypokalaemia, thrombosis, water intoxication, dehydration |
| Risk factors | Poor dietary or diabetic management, genetic predisposition to cardiac arrythmia |
| Diagnostic method | Based on symptoms. Some thrombotic pre-syncope may be indicated by a troponin serum level. |
| Treatment | Dependent on the cause. May include IV fluids, Ringer's Lactate, glucose replacement therapy, thrombolytics, or simply sitting down/resting. |
Lightheadedness is a common and typically unpleasant sensation of dizziness[1] or a feeling that one may faint. The sensation of lightheadedness can be short-lived, prolonged, or, rarely, recurring. In addition to dizziness, the individual may feel as though their head is weightless. The individual may also feel as though the room is "spinning" or moving (vertigo). Most causes of lightheadedness are not serious and either cure themselves quickly or are easily treated.
Keeping a sense of balance requires the brain to process a variety of information received from the eyes, the nervous system, and the inner ears. If the brain is unable to process these signals, such as when the messages are contradictory, or if the sensory systems are improperly functioning, an individual may experience lightheadedness or dizziness.
Lightheadedness is very similar to pre-syncope. Pre-syncope is the immediate stage before syncope (fainting), particularly in cases of temporary visual field loss (i.e. vision getting "dark" or "closing in").[2]
- ^ "Chapter 14: Evaluation of the Dizzy Patient". Retrieved 2009-08-06.
- ^ Joel A. Goebel (2008). Practical Management of the Dizzy Patient. Lippincott Williams & Wilkins. p. 299. ISBN 978-0-7817-6562-6.