Tachycardia, supraventricular is an irregularly fast or unpredictable heartbeat (arrhythmia) that involves the upper chambers of the heart. Between 60 and 100 per minute, the normal heartbeats. A heart rate of over 100 beats per minute is known to as tachycardia. The heart beats 150 to 220 times per minute during an event of SVT, but it can rarely beat quickly or slowly.
Most patients don’t require any activity limitations or treatment. Others may require lifestyle modifications, medication, or heart operations to reduce or eradicate their rapid heartbeats and symptoms.