A high heart rate, known as tachycardia, exists when a person's resting pulse exceeds 100 beats per minute, according to Mayo Clinic. The normal heart beat range for a healthy adult is between 60 and 100 beats per minute... More »

www.reference.com Health Medical Ranges & Levels

Causes of irregular heartbeat, called arrhythmia, include high blood pressure, overactive or underactive thyroid gland, excessive alcohol consumption and changes in the structure of the heart, according to Mayo Clinic. O... More »

Damaged heart tissues, anemia, high blood pressure, and disease or congenital abnormality of the heart are causes of fast heart rate. A heart rate of over 100 beats per minute, also known as tachycardia, is also caused b... More »

www.reference.com Health Pain & Symptoms

A rapid pulse rate of 100 beats per minute or more is referred to as tachycardia, and in severe cases causes unconsciousness or cardiac arrest, according to the American Heart Association. Symptoms of tachycardia vary bu... More »

www.reference.com Health Medical Ranges & Levels

A heart rate that is higher than 100 beats per minute is considered to be a high heart rate, also referred to as tachycardia, according to the American Heart Association. However, it should be noted that a high heart rat... More »

An elevated heart rate above 100 beats per minute in adults is referred to as tachycardia, and its causes include anxiety, heavy alcohol consumption, heavy smoking, heart attack, sarcoidosis, some medications and some fe... More »

www.reference.com Health Medical Ranges & Levels

A normal heart rate, or pulse, at rest is 60 to 100 beats per minute, according to the American Heart Association. People who are physically fit may have lower heart rates, while people who are very overweight or in poor... More »