| Subject | German | English |
| med. | Q.R.S.T.-Strecke im Elektrokardiogramm | Q.R.S.T. interval |
| commun. | Q-Serie der ITU-T CCITT -Empfehlungen | Q-series of ITU-T CCITT Recommendations (relates to Signalling System No.7) |
| gen. | Q-T-Intervall | QT shortening |
| med. | Q.T.-Dauer | Q.T. interval |
| commun. | Q-T-Kanalinformation | Q T channel information |
| med. | Q-T-Strecke | electroventriculogram |