How bad is a 150 heart rate?

A heart rate of 150 beats per minute (bpm) is considered tachycardia, or a rapid heart rate. This can be a symptom of an underlying medical condition, such as an arrhythmia (abnormal heart rhythm), hyperthyroidism (overactive thyroid gland), anemia (low red blood cell count), dehydration, or an infection.

For most people, a heart rate of 150 bpm is not immediately dangerous, but it can cause symptoms such as chest pain, shortness of breath, lightheadedness, dizziness, or fainting. Severe tachycardia can lead to complications such as stroke if left untreated. If you experience unexplained and persistent tachycardia, it is important to consult with a doctor. The doctor may investigate to determine the cause of your tachycardia, as well as recommend the most appropriate treatment option.