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.roneverhart.com/Fire-Retardant-Premium-Polyester-8ft-Rectangular-Tablecloth-Ivory-Fitted-High-Performance-Table-Cover/