This is another thing that has been bothering me for quiet some time. I thought I understood it at one time why the T wave was not "negative" but for our cardiovascular block the doctor couldn't explain it. I know it has to do with the charges and how the electrodes of the ECG is set up. So an upstroke is depolarization from say the base to the apex of the heart. Then when the ventricles re polarize the the dipole is reversed - so I keep wanting to think uptroke of the right ventricle overpowers the downstroke of the left ventricle... or something to that effect. I am not sure if this is right or not - anyone have a quick explanation? Thanks!