Background and Purpose-Spasticity is a disabling complication of stroke and different noninvasive treatments are used to reduce muscle hypertonia. Shock waves are defined as a sequence of single sonic pulses largely used in the treatment of diseases involving bone and tendon as well as muscular contractures. The effect and duration of extracorporeal shock wave therapy (ESWT) was investigated on muscle hypertonia of the hand and wrist. Methods-A total of 20 patients affected by stroke associated with severe hypertonia in upper limbs were evaluated.Placebo stimulation was performed 1 week before active stimulation in each patient. Evaluation was performed using the National Institutes of Health and Ashworth scales and video monitoring with a digital goniometer before and immediately after placebo or active stimulation. Motor nerve conduction velocity from abductor digiti minimi were recorded. Patients were monitored at 1, 4, and 12 weeks after active treatment. Results-After active ESWT, patients showed greater improvement in flexor tone of wrist and fingers compared with placebo stimulation. At the 1-and 4-week follow-up visits, a significant decrease of passive muscle tonicity was noted on muscles in all patients receiving active treatment. At 12 weeks after therapy, 10 of the 20 patients showed persistent reduction in muscle tone. There were no adverse events associated with ESWT. Key Words: extracorporeal shock wave therapy Ⅲ muscle spasticity Ⅲ rehabilitation Ⅲ shock waves Ⅲ stroke I ncrease in muscle tone in the hands and wrists is a major problem in the management of chronic hemiparetic patients and may seriously impair dressing, washing, and other activities of daily living. 1 Motor neuron syndrome in stroke patients is a collection of symptoms including motor defects, increased reflexes, and muscle hypertonia, which produce a series of complications causing changes in the rheologic components of muscles and subsequent stiffness in tendons and joints. 1 In stroke, the hypertonia in muscles is partially related to spinal hyperexcitability in addition to fibrosis and changes in connective tissues that are responsible for passive rigidity of muscles. 1 Recent studies have reported that muscular injections of botulinum toxin type A decreases muscular tone in hypertonic muscles of the hand, with improvement in the use of the upper limb and a decrease in complications. [2][3][4][5] However, in a small number of patients, the development of neutralizing antibodies can reduce the efficacy of treatment. In addition, the dosage of botulinum is not always sufficient to treat extensive and severe hypertonia in upper and lower limbs. Rehabilitation and different noninvasive treatments, particularly on the connective components, should be also considered.
Conclusions-ESWTShock waves are defined as a sequence of single sonic pulses characterized by high peak pressure (100 MPa), fast pressure rise (Ͻ10 ns), and short duration (10 s). Different studies and clinical experiments have demonstrated the efficacy of shock waves ...