[Vascular rehabilitation in lower-extremity artery diseasein 2018]. / Réadaptation vasculaire de l'artériopathie oblitérante des membres inférieurs en 2018.

WHAT WE KNEW: The vascular rehabilitation is an effective treatment for patients with an intermittent claudication linked to lower-extremity artery disease. This treatment increases the claudication distance of 180% with the Gardner's protocol (30 to 60 minutes of walking at least 3 times a week, walking until appearance of a mild pain) and allows also to control the vascular risk factors. This treatment is not enough prescribed for many reasons and often requires a hospitalization in a rehabilitation centre. WHAT WE KNOW NOW: Walking rehabilitation remains the base of the treatment of lower-extremity artery disease. Many walking protocols can be proposed. For a similar efficiency, patients are not obliged to walk until appearance of a pain but only until appearance of a discomfort. Exercises other than walking have been tested and can be used. Heart Rehabilitation Centres will propose more often vascular rehabilitation including hospitalisations for complex patients or out-management for non-complex patients. With a lower cost, the walking rehabilitation could be also realised at home by the patient himself with a certain degree of supervision with good results. Supervision means the use of a podometer, weekly advices given by phone by a Vascular Physician or a Physiotherapist, one walking session once a week in a rehabilitation centre. Connected devices could be also helpful allowing increasing of the patients' motivation. Simultaneously, it is necessary that the patients observe the recommendations of the World Health Organisation by performing weekly 150 minutes of mild-intensity endurance's activity in order to minimise their long-term vascular risk. Finally, the respective place of the revascularisations and walking rehabilitation remains to be clarify in case of intermittent claudication due to a superficial femoral artery lesion.

The efficacy of transcutaneous electrical nerve stimulation on the improvement of walking distance in patients with peripheral arterial disease with intermittent claudication: study protocol for a randomised controlled trial: the TENS-PAD study.

BACKGROUND: In patients with peripheral arterial disease (PAD), walking improvements are often limited by early pain onset due to vascular claudication. It would thus appear interesting to develop noninvasive therapeutic strategies, such as transcutaneous electrical nerve stimulation (TENS), to improve the participation of PAD patients in rehabilitation programmes, and thus improve their quality of life. Our team recently tested the efficacy of a single 45-min session of 10-Hz TENS prior to walking. TENS significantly delayed pain onset and increased the pain-free walking distance in patients with class-II PAD. We now seek to assess the efficacy of a chronic intervention that includes the daily use of TENS for 3 weeks (5 days a week) on walking distance in Leriche-Fontaine stage-II PAD patients. METHODS/DESIGN: This is a prospective, double-blind, multicentre, randomised, placebo-controlled trial. One hundred subjects with unilateral PAD (Leriche-Fontaine stage II) will be randomised into two groups (1:1). For the experimental group (TENS group): the treatment will consist of stimulation of the affected leg (at a biphasic frequency of 10 Hz, with a pulse width of 200 µs, maximal intensity below the motor threshold) for 45 min per day, in the morning before the exercise rehabilitation programme, for 3 weeks, 5 days per week. For the control group (SHAM group): the placebo stimulation will be delivered according to the same modalities as for the TENS group but with a voltage level automatically falling to zero after 10 s of stimulation. First outcome: walking distance without pain. SECONDARY OUTCOMES: transcutaneous oxygen pressure (TcPO2) measured during a Strandness exercise test, peak oxygen uptake (VO2 peak), endothelial function (EndoPAT®), Ankle-brachial Pressure Index, Body Mass Index, lipid profile (LDL-C, HDL-C, triglycerides), fasting glycaemia, HbA1c level, and the WELCH questionnaire. DISCUSSION: TENS-PAD is the first randomised controlled trial that uses transcutaneous electrical therapy as an adjuvant technique to improve vascular function in the treatment of PAD. If the results are confirmed, this technique could be incorporated into the routine care in cardiovascular rehabilitation centers and used in the long term by patients to improve their walking capacity. TRIAL REGISTRATION: ClinicalTrials.gov, ID: NCT02678403 . Registered on 9 February 2016. SPONSOR: Toulouse University Hospital.

Improved Walking Claudication Distance with Transcutaneous Electrical Nerve Stimulation: An Old Treatment with a New Indication in Patients with Peripheral Artery Disease.

OBJECTIVE: The aim of this study was to determine whether 45 mins of transcutaneous electrical nerve stimulation before exercise could delay pain onset and increase walking distance in peripheral artery disease patients. DESIGN: After a baseline assessment of the walking velocity that led to pain after 300 m, 15 peripheral artery disease patients underwent four exercise sessions in a random order. The patients had a 45-min transcutaneous electrical nerve stimulation session with different experimental conditions: 80 Hz, 10 Hz, sham (presence of electrodes without stimulation), or control with no electrodes, immediately followed by five walking bouts on a treadmill until pain occurred. The patients were allowed to rest for 10 mins between each bout and had no feedback concerning the walking distance achieved. RESULTS: Total walking distance was significantly different between T10, T80, sham, and control (P < 0.0003). No difference was observed between T10 and T80, but T10 was different from sham and control. Sham, T10, and T80 were all different from control (P < 0.001). There was no difference between each condition for heart rate and blood pressure. CONCLUSIONS: Transcutaneous electrical nerve stimulation immediately before walking can delay pain onset and increase walking distance in patients with class II peripheral artery disease, with transcutaneous electrical nerve stimulation of 10 Hz being the most effective.