What could cause a slight arrhythmia at sudden changes of position?

Position . Positional change can cause heart rate changes that mimic arrhythmias and should be documented .
Intrathoracic pressu. Slight arrhythmia or palpitation is usually benign, if brief and self limiting and not causing any other symptoms. If provoked by positional change, likely being influenced by blood return to the right atrium.

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