Both may occur in episodes or be chronic. Ventricular tachycardia Immediately life-threatening, the ventricular arrhythmias ventricular tachycardia and fibrillation represent progressively more disorganized electrical activity of the ventricles, the heart s pumping mechanism. Palpitations may be caused by episodes of ventricular tachycardia. Ventricular tachycardia can become sustained and tolerated by some for a variable amount of time but is at risk of becoming unstable or degenerating into ventricular fibrillation. In ventricular fibrillation there is no organized pumping at all.
Death is inevitable within seconds to minutes unless there is immediate intervention.
The vast majority of ventricular arrhythmias occur in people with heart conditions. Can cause a variety of nonspecific symptoms including episodic chest pain, fatigue, and breathlessness, as well as palpitations. These people exhibit a variety of usually short-lasting arrhythmias. Longer episodes are seen with sinus tachycardia, paroxysmal supraventricular tachycardia, and the atrial and ventricular arrhythmias. PSVT exhibits a fast and constant heart rate, usually between 150-250 beats per minute, which starts and stops suddenly.