Tachycardia is a condition characterized by

Tachycardia is a heart rate that exceeds the

normal resting rate. In general, a resting heart

rate over 100 beats per minute is accepted as

tachycardia in adults. A healthy adult heart

normally beats 60 to 100 times a minute when

a person is at rest. Tachycardia occurs when

an abnormality in the heart produces rapid

electrical signals.