ECG

P-R interval

it normally lasts range from 0.12 to 0.20 seconds. this is the time required to translate an action potential through the entire conduction system.

P-Q segment

Associated with the atrial plateau at the sarcolemma when the cardiac muscle cells within the atria are contracting on the EKG.

P-R interval

from start of p wave which is atrial depolarization to start of QRS of deflection which is ventricular depolarization.

S-T segment

is the ventricular plateau when the cardiac muscle Call with in the ventricles are contracting.

QRS complex of ECG

represent the electrical changes associated with ventricular depolarization. qrs last between 0.06 and 0.1 second.

Q-T interval

the Q-T interval represent the time from the beginning of the QRS which is ventricular depolarization to the end of T wave which is ventricular repolarization.

p wave

the p wave reflects electrical change of atrial depolarization that originates in the S.A. node.

T wave

the t wave is the electrical change associated with ventricular repolarization

p wave.

the wave typically last 0.08 to 0.1 second.

Q-T interval

this is the time required for action potential 2 to occurwithin the ventricles. this interview range from 0.2 to 0.4 seconds