<unk>  <unk>  is a rare condition characterized by an irregular heart rhythm (arrhythmia) that can be life-threatening. In people with<unk> , these episodes typically begin in childhood but symptoms can also show up later in life. As the heart rate increases in response to physical activity or emotional stress, it can trigger an abnormally fast and irregular heartbeat called ventricular tachycardia. With this condition, the heart beats so quickly that it doesn't have enough time to fill blood between beats. As a result, not enough blood gets pumped to the body. The first sign is often fainting or near fainting during exercise or strong emotion. Other symptoms include light-headedness, dizziness, and also may cause the heart to stop beating (cardiac arrest), leading to sudden death. If untreated, it is very lethal.
Catecholaminergic polymorphic ventricular tachycardia
Sinoatrial nodal reentry tachycardia
Fascicular VT
Pacemaker mediated tachycardia
Pre-excitation syndrome
Wandering atrial pacemaker
Polymorphic ventricular tachycardia
Pulseless ventricular tachycardia