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CVP Waveform AF — FRCA Final MCQ

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ModerateIntensive Care MedicineCVP Waveform AFFRCA Final

CVP waveform: absent 'a' waves with irregular pattern. Underlying rhythm?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: D — Atrial fibrillation

Absent 'a' waves = loss of coordinated atrial contraction = AF. In AF the 'a' wave replaced by irregular fibrillatory oscillations. Cannon 'a' waves = atrial contraction against closed tricuspid valve (CHB, VT) — different from absent 'a' waves.

Reference: RCOA – 2020 – CVP waveform interpretation