Most<unk> s are unpleasant rather than life-threatening, although very fast heart rates can be problematic for those with underlying ischemic heart disease, or the elderly. Episodes can be treated when they occur by Valsalva maneuver, adenosine injection or taking a AV node blocking agent as pill-in-pocket, but regular medication may also be used to prevent or reduce recurrence. While some treatment modalities can be applied to all<unk> s, there are specific therapies available to treat some sub-types. Effective treatment consequently requires knowledge of how and where the arrhythmia is initiated and its mode of spread. Lifestyle changes, medication and heart procedures may be needed to control or eliminate the rapid heartbeats and related symptoms.<unk> s can be categorised by whether the AV node is involved in maintaining the rhythm. If so, manoeuvres slowing conduction through the AV node will terminate it. If not, AV nodal blocking maneuvers will not terminate it, but resulting temporary suppression of the AV node is still useful to unmask the underlying abnormal rhythm. Acute attacks of<unk>  are treated with Esmolol (i.v.).
Supraventricular tachycardia
Tachycardia
Sinus arrhythmia
Ventricular tachycardia
Junctional tachycardia
Ectopic beat
Inappropriate sinus tachycardia
Ventricular flutter