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Upper panel: ECG of a 102‐year‐old subject with chaotic atrial rhythm (P waves with three different morphologies in the same lead, with an isoelectric baseline between them and changing PP intervals); Lower panel: Pulse‐wave Doppler recording of the mitral inflow in the same patient. Note the significant changes in A‐wave velocities and in the time relationship between E and A waves, due to the underlying multifocal atrial activity.
