How should BP be measured in the presence of an irregular heart rhythm?

• A. Take multiple readings and average; use ABPM/HBPM; ensure device is validated for irregular rhythms if automated
• B. Take a single reading only
• C. Use only a wrist cuff
• D. Abandon automated method entirely

Answer: (A)

Irregular heart rhythms cause beat-to-beat variation in blood pressure, so a single reading can be misleading. The most reliable approach is to take multiple measurements and average them, which smooths out this natural fluctuation. If automated devices are used, it’s important to choose those that are validated for irregular rhythms (AFib); some oscillometric monitors aren’t accurate when the rhythm is irregular. Using ambulatory BP monitoring (ABPM) or home BP monitoring (HBPM) collects many readings over time, providing a representative BP profile and reducing the impact of rhythm-related variability. If automated devices aren’t validated for irregular rhythms, manual measurement with a properly sized cuff and correct technique remains a solid option. In short, multiple readings plus validated devices or ABPM/HBPM give the most accurate picture when the rhythm is irregular.