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LQTS: Difference between revisions
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===ECG tests=== | ===ECG tests=== | ||
[[Image:Lqts1-3.png|right|thumb|400px|Various ECG patterns can be recognized among the different genotypes]] | [[Image:Lqts1-3.png|right|thumb|400px|Various ECG patterns can be recognized among the different genotypes. LQT1 is characterised by prolonged QT intervals associated with a broad-based T wave. LQT2 is characterised by low-amplitude and notched T waves. LQT3 is characterised by long ST segments with a late-appearing T wave resulting in a long QT interval.]] | ||
ECGs can be difficult because there is a considerable overlap between the QT interval of affected and unaffected individuals. | ECGs can be difficult because there is a considerable overlap between the QT interval of affected and unaffected individuals. | ||
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*Adenosine infusion is a test provoking transient bradycardia followed by sinus tachycardia and therefore triggers QT changes that can distinguish patients with LQTS from healthy controls | *Adenosine infusion is a test provoking transient bradycardia followed by sinus tachycardia and therefore triggers QT changes that can distinguish patients with LQTS from healthy controls | ||
<gallery> | |||
File:Lqts1.png|A 12 lead ECG of a patient with genetically proven LQTS1 | |||
File:Lqts2.png|A 12 lead ECG of a patient with genetically proven LQTS2 | |||
File:Lqts3.png|A 12 lead ECG of a patient with genetically proven LQTS3 | |||
</gallery> | |||
==Genetic diagnosis== | ==Genetic diagnosis== | ||