Main Page | See live article | Alphabetical index Tachycardia is the too-rapid beating of the heart. If the heart beats too rapidly it performs inefficiently and blood flow and blood pressure paradoxically are reduced. Postural orthostatic tachycardia syndrome (POTS) is a form of tachycardia that occurs with a change in body position (eg, going from laying down to standing up) and which is generally due to dysautonomia. Tachycardia is a general term that is applied in a lot of different contexts. Most generally it means pathologically increased heart rate. Paroxysmal Tachycardia Supraventricular Paroxysmal Tachycardia (SVT) Ventricular Paroxysmal Tachycardia (VT) sustained unsustained Tachycardia, as applied in adult medicine, is defined as a resting heart rate of over 100 beats per minute (BPM). See also : Cardiac arrhythmia This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.