When Tachycardia Is Dangerous?

But if left untreated, tachycardia can disrupt normal heart function and lead to serious complications, including: Heart failure. Stroke. Sudden cardiac arrest or death.

What is a dangerous level of tachycardia?

Tachycardia refers to a heart rate that's too fast. How that's defined may depend on your age and physical condition. Generally speaking, for adults, a heart rate of more than 100 beats per minute (BPM) is considered too fast.

What tachycardia is life threatening?

Ventricular tachycardia (VT) is a fast, abnormal heart rate. It starts in your heart's lower chambers, called the ventricles. VT is defined as 3 or more heartbeats in a row, at a rate of more than 100 beats a minute. If VT lasts for more than a few seconds at a time, it can become life-threatening.