A heart rate is generally considered too high (tachycardia) when it exceeds 100 beats per minute (bpm) at rest for adults

. This threshold can vary depending on factors such as age, overall health, and activity level. Key points about high heart rate:

• Normal resting heart rate for adults ranges from 60 to 100 bpm

• A resting heart rate above 100 bpm is classified as tachycardia, which can be mild or life-threatening depending on the cause and severity

• High heart rates during exercise are expected, but exceeding your maximum heart rate for prolonged periods can be risky, especially with underlying heart conditions

• Maximum heart rate is roughly estimated as 220 minus your age; for example, a 50-year-old has a max heart rate of about 170 bpm

• Symptoms indicating a dangerously high heart rate include dizziness, chest tightness, difficulty breathing or speaking, nausea, and illness

• Causes of tachycardia include anxiety, stress, fever, anemia, heart disease, certain medications, and substance use

If your resting heart rate is consistently above 100 bpm or you experience symptoms, it is important to seek medical evaluation to determine the underlying cause and appropriate treatment

. In summary, a resting heart rate above 100 bpm is typically considered too high and may require medical attention depending on symptoms and individual health factors.