A 55-year-old woman on ICU develops a regular narrow-complex tachycardia at 180 bpm. She is haemodynamically stable (BP 110/70). Vagal manoeuvres have...

Question

A 55-year-old woman on ICU develops a regular narrow-complex tachycardia at 180 bpm. She is haemodynamically stable (BP 110/70). Vagal manoeuvres have been attempted without success. The team administers IV adenosine. The first dose of 6 mg has no effect. What is the next dose?

Accepted Answer

Adenosine 12 mg - if the initial 6 mg dose fails, give 12 mg; if this fails, give a further 12 mg

Answer

Adenosine 3 mg

Answer

Adenosine 18 mg

Answer

Switch immediately to DC cardioversion

Answer

Adenosine 6 mg repeated 5 times

uk-fficm MCQ (SBA): SVT - Adenosine Dosing

A 55-year-old woman on ICU develops a regular narrow-complex tachycardia at 180 bpm. She is haemodynamically stable (BP 110/70). Vagal manoeuvres have been attempted without success. The team administers IV adenosine. The first dose of 6 mg has no effect. What is the next dose?