Abstract Background The valsalva manoeuvre is an internationally recommended initial treatment for supraventricular tachycardia (SVT). The pre-hospital use of a valsalva assist device. to help deliver this manoeuvre. could improve cardioversion rates and reduce the need for patients to attend hospital. https://www.hairtobeautyers.shop/product-category/remy-human-hair-lace-part-wig/