<unk>  (also colloquially known as sinus tach or sinus tachy) is an elevated sinus rhythm characterized by an increase in the rate of electrical impulses arising from the sinoatrial node. In adults,<unk>  is defined as a heart rate greater than 100 beats/min (bpm). The normal resting heart rate is 60–90 bpm in an average adult. Normal heart rate varies with age and level of fitness, from infants having faster heart rates (110-150 bpm) and the elderly having slower heart rates.<unk>  is a normal response to physical exercise, when the heart rate increases to meet the body's higher demand for energy and oxygen, but<unk>  can also indicate a health problem. Thus,<unk>  is a medical finding that can be either physiological or pathological.
Sinus tachycardia
Tachycardia
Sinus arrhythmia
Junctional tachycardia
Sinus bradycardia
Ventricular tachycardia
Inappropriate sinus tachycardia
Automatic tachycardia