Abstract    

An 87 year old man with a history of idiopathic Parkinson’s disease attended the day hospital for assessment of worsening tremor. Examination revealed marked bilateral resting tremor worse on the right. Electrocardiography carried out for a history of postural syncope was difficult to perform due to the resting tremor. A tracing was recorded which showed an apparent broad complex tachycardia at 240-280 bpm. The patient was well throughout. Holter tape analysis on two occasions showed brief runs of atrial tachycardia only.  Tremor-induced artefact was felt to be the likely cause.