it seems to be indicated to repeat the investigation under orthostatic conditions , when an adequate anamnesis of the tachycardia is present and an initiation possibility in lying position is lacking , or when a great subjective impairment in a paroxysm of tachycardia is reported and there is a relatively low frequency of tachycardia in lying position .
C0039236
paroxysm
C0039231
tachycardia