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there are four important differences from what is | there are four important differences from what is | ||
usually referred to as TdP. | usually referred to as TdP. | ||
is not preceded by a pause; TdP is a polymorphic | #There is no long QT interval and | ||
#the arrhythmia is not preceded by a pause; TdP is a polymorphic | |||
ventricular arrhythmia almost exclusively | ventricular arrhythmia almost exclusively | ||
encountered in the setting of prolongation of | encountered in the setting of prolongation of | ||
the QT interval and preceded by a pause. | the QT interval and preceded by a pause. | ||
#The rate is very high (up to 300 beats/min); | |||
typically, TdP has a rate of 220 beats/min. | typically, TdP has a rate of 220 beats/min. | ||
#The coupling interval of the initiating beat is | |||
extremely short; TdP in the setting of a | extremely short; TdP in the setting of a | ||
prolonged QT interval is always initiated by a | prolonged QT interval is always initiated by a | ||
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intervals are otherwise only ever seen in acute | intervals are otherwise only ever seen in acute | ||
myocardial ischaemia. | myocardial ischaemia. | ||
Recently, it has been suggested that the arrhythmia | Recently, it has been suggested that the arrhythmia | ||
may be cured by radiofrequency catheter ablation.2 | may be cured by radiofrequency catheter ablation.2 | ||
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arrhythmia recurrence). Long-term follow-up has to | arrhythmia recurrence). Long-term follow-up has to | ||
be awaited before the patient can be discharged without | be awaited before the patient can be discharged without | ||
an ICD. | an ICD.<cite>Leenhardt</cite><cite>Haissaguerre</cite> | ||
==References== | ==References== | ||
<biblio> | <biblio> |