QT interval

noun

A measurement made on an electrocardiogram, calculated as the time from the start of the Q-wave to the end of the T-wave, and approximates to the time taken from when the cardiac ventricles start to contract to when they finish relaxing.

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Meanings

nounQT interval (plural QT intervals)

plural QT intervals

  1. cardiologyA measurement made on an electrocardiogram, calculated as the time from the start of the Q-wave to the end of the T-wave, and approximates to the time taken from when the cardiac ventricles start to contract to when they finish relaxing.

    Synonyms: QT

Synonyms & antonyms

nounA measurement made on an electrocardiogram, calculated as the time from the start of the Q-wave to the end of the T-wave, and approximates to the time taken from when the cardiac ventricles start to contract to when they finish relaxing.

Similar
QT
Cite this entry
APA

QT interval. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/QT%20interval

MLA

“QT interval.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/QT%20interval. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “QT interval,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/QT%20interval.

Source: QT interval on Wiktionary, CC BY-SA 4.0.