The Heart

aminah97's version from 2016-03-06 17:06


Question Answer
Myogenic contractionThe heart can beat without any input from the nervous system as long as its cells stay alive.
MyocytesMuscle cells in the heart with a slight electrical charge.
Artificial PacemakersDevices implanted in the heart to control and keep the heartbeat regular if the patient cannot do that on their own.
P waveWave of depolarisation that spreads from the SAN across the atria and which causes atrial systole.
PR intervalThe time taken for the wave of depolarisation to be conducted from the SAN to the ventricles via the AVN.
QRS complexWave of depolarisation that spreads across the ventricles and causes ventricular systole.
ST segmentInterval between the end of ventricular depolarisation and the start of ventricular repolarisation.
T waveRepolarisation of the ventricles during diastole.