The interval between the peak of the T wave to its end has been associated with the risk of arrhythmias.
Exam: 12-lead ECG
Measurement:
(1) vertical line through peak of the T wave
(2) vertical line through the terminus of the T wave
(3) the interval in milliseconds between the 2 vertical lines
Interpretation:
• An increase in the interval is associated with an increased risk of ventricular tachycardia, sudden cardiac death and all-cause mortality.
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Condition
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Cutoff for Prolongation
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general population
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113.6 ms
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ischemic heart disease
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109.6 ms
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Brugada syndrome
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95.8 ms
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heart failure
|
106.3 ms
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The interval can also be combined with other measures such as the QT interval as the T(p-e) to QT interval ratio.
