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.bekindtopets.com/hot-mega-Swish-Supreme-Glide-Track-White-great-pick/