The<unk>  is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle.  The<unk>  is a general measure of how long it takes for the heart to recharge or repolarize itself electrically. The<unk>  is dependent on the heart rate such that the faster the heart rate, the shorter the<unk> .  As a result, the<unk>  must be adjusted for the heart rate for accurate interpretation.  This adjustment is called the corrected<unk>  or<unk> c. A lengthened<unk>  is a biomarker for ventricular tachyarrhythmias such as torsades de pointes and is a risk factor for sudden cardiac death.
QT interval
PR interval
ST interval
QRS complex
RR interval
PP interval
P wave
T wave