Detrusor-external sphincter dyssynergia: a detailed electromyographic study

J Urol. 1981 Apr;125(4):545-8. doi: 10.1016/s0022-5347(17)55100-9.


We reviewed 54 cases of detrusor-external sphincter dyssynergia following complete urodynamic evaluations. All patients had well defined neurologic lesions of the suprasacral spinal cord. On the basis of urodynamic findings 3 types of dyssynergia were encountered: type 1 (30 per cent) was characterized by a crescendo increase in electromyographic activity that reached a maximum at the peak of the detrusor contraction, type 2 (15 per cent) consisted of clonic sphincter contractions interspersed throughout the detrusor contraction and type 3 (55 per cent) was characterized by a sustained sphincter contraction that coincided with the detrusor contraction. There was no correlation between the clinical neurologic level and the type of dyssynergia.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Action Potentials
  • Adolescent
  • Adult
  • Child
  • Child, Preschool
  • Electromyography
  • Female
  • Humans
  • Male
  • Middle Aged
  • Muscle Contraction*
  • Spinal Cord Diseases / physiopathology
  • Urethra / physiopathology*
  • Urinary Bladder, Neurogenic / diagnosis
  • Urinary Bladder, Neurogenic / physiopathology*