First of all ventricular tachycardia - tachycardia is a term used to describe a heart rate above 100 beats per minute.
Bradycardia is an irregularly slow heart rhythm, and tachycardia is an irregularly fast heart rhythm.
The drug has a similar effect to decreasing the tone of the parasympathetic nervous system, causing tachycardia.
In some patients an increase in ventricular ectopy including non-sustained ventricular tachycardia has been observed which did not affect patient safety or outcome.
It is particularly useful to treat hypotension during spinal anesthesia when the patient has a tachycardia.