13th March 2024

A 26-year-old student is referred to the Cardiology clinic following investigations for suspected LQTS.

A 26-year-old student is referred to the Cardiology clinic following investigations for suspected LQTS. Genetic testing reveals a mutation in SCN5A. His ECG shows a QTc 565 ms. He has already been commenced on propranolol. Today, you consider adding additional medication. What is the mechanism of action for this new drug? 

Select the SINGLE most appropriate option from the list below. Select ONE option only.