A 55-year-old man on ICU has a temporary transvenous pacing wire. The pacing threshold rises from 0.5V to 4V over 3 days. What is the most likely caus...

Question

A 55-year-old man on ICU has a temporary transvenous pacing wire. The pacing threshold rises from 0.5V to 4V over 3 days. What is the most likely cause?

Accepted Answer

Lead displacement or myocardial oedema and fibrosis at the electrode-tissue interface - temporary wires can migrate and the inflammatory response increases pacing threshold

Answer

Battery depletion

Answer

The patient no longer needs pacing

Answer

Generator fault

Answer

Electromagnetic interference

uk-fficm MCQ (SBA): Temporary Pacing - Rising Threshold

A 55-year-old man on ICU has a temporary transvenous pacing wire. The pacing threshold rises from 0.5V to 4V over 3 days. What is the most likely cause?