ECG waves (P1)
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8 Terms
ECG
electrocardiogram
what is ECG
diagram shows the electrical activity of the heart over time
P wave - atrial depolarization
represents electrical activity as the atria contract
atria push blood into the ventricles
QRS complex - ventricular depolarization
represents electrical activity as the ventricles contract
strongest signal because ventricles are larger
atrial repolarization happens here but is hidden by the large signal
T wave - ventricular repolarization
represents ventrucles relaxing and resetting electrically
prepares the heart for the next beat
PR interval
shows time for electrical signal to travel from atria to ventricles
ST segment
ventricles are fully contracted
QT interval
total time ventricles take to contract and recover
