Also found in: Medical.


An agent, such as a drug, that increases the heart rate.

car′di·o′ac·cel′er·a′tion n.
References in periodicals archive ?
In the heart, the dominant action of 2-AR agonists is a decrease in tachycardia (through blocking cardioaccelerator nerve) and bradycardia via 2A-AR (through a vagomimetic action).
These and perhaps other stimuli are mediated by cardioaccelerator fibers originating in the upper fetal thoracic spinal cord.
Therefore, the cardioaccelerator nerves must be responsible for this response, whereas the pericardial neurohormone secretions are not.