There are numerous causes of Dizziness and Blackouts and these may relate to problems with the heart, the blood pressure, the brain and nerves, the inner ear and disorders of blood components.
Dizziness and blackouts due to disorders of heart rhythm – principally slow or fast heartbeats – are typically characterized by a rapid onset of symptoms and then a rapid recovery. Differentiating between the various causes of a blackout can be difficult and may require investigation from a cardiologist, neurologist and ENT surgeon, amongst others. This article will focus on cardiac causes of dizziness and blackouts and in particular disorders of heart rhythm. The medical term for a sudden blackout is called syncope (pronounced sing-kuh-pee).