CARDIOLOGY DOCTOR NEAR TO ME PLEASE TAKE CARE OF YOUR HEART Tachycardia, also called tachyarrhythmia, 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. Abnormal electrical signals in the ventricles result in a rapid heart rate. The speed of the heartbeat does not allow the ventricles to fill and contract properly, resulting in poor blood supply to the body. This type of tachycardia is frequently a life-threatening condition and is treated as a medical emergency