false
OasisLMS
Catalog
HRS Board Review 2025 New Courses (Reviewers Copy)
Workshop 1_Electrocardio_London_2025_case 1 answer
Workshop 1_Electrocardio_London_2025_case 1 answer
Back to course
[Please upgrade your browser to play this video content]
Video Transcription
Video Summary
The exercise stress test is useful in diagnosing long QT syndrome types 1 and 2 by showing QT interval prolongation during exercise and early recovery. Long QT type 1 results from KCNQ1 gene mutations affecting the potassium channel, leading to prolonged QT interval and risk of arrhythmias at fast heart rates. Type 2, due to KCNH2/ HERG mutations, shows T-wave abnormalities. Type 3 stems from SCN5A mutations affecting sodium channels. NADALOL is highly effective for preventing arrhythmias and sudden death in long QT1 patients, even those with asymptomatic gene mutations, and outperforms other beta blockers for primary prevention.
Keywords
Long QT syndrome
QT interval prolongation
KCNQ1 gene mutations
NADALOL effectiveness
arrhythmia prevention
×
Please select your language
1
English