Which guideline-compliant approach is recommended for atrial fibrillation when measuring BP?

• A. Use a standard home BP device regardless of rhythm
• B. Use validated AF-capable devices or ABPM/HBPM for confirmation
• C. Do not measure again
• D. Rely on symptoms to assess BP

Answer: (B)

In atrial fibrillation, the irregular heartbeat makes single BP readings unreliable because each beat can yield a different pressure value. The safest, guideline-aligned approach is to use a device proven to work with irregular rhythms or to confirm readings with ambulatory or home BP monitoring. AF-capable devices have been validated to measure BP accurately despite the rhythm, and ABPM or HBPM provides an average over multiple readings, reducing the influence of a few atypical beats. This approach minimizes the risk of under- or overestimating BP that can happen with standard devices used without rhythm-specific validation.

Relying on a standard home device regardless of rhythm is prone to inaccuracy in AF. Not measuring again ignores the beat-to-beat variability, leading to a potentially misleading single value. Symptoms are not a reliable substitute for actual BP values, since BP changes can occur without noticeable symptoms and do not consistently reflect true BP.