biostudies-literatureAppelboam ANational Institute for Health Research (NIHR)e073315https://www.ebi.ac.uk/biostudies/studies/S-EPMC10255124biostudies-literatureUnknown13(6)<h4>Introduction</h4>Patients with episodes of supraventricular tachycardia (SVT), a common heart arrhythmia, are often attended by ambulance services. International guidelines advocate treatment with the Valsalva manoeuvre (VM), but this simple physical treatment has a low success rate, with most patients requiring conveyance to hospital. The Valsalva Assist Device (VAD) is a simple device that might help practitioners and patients perform a more effective VM and reduce the need for patients to be taken to hospital.<h4>Methods and analysis</h4>This stepped wedge cluster randomised controlled trial, conducted within a UK ambulance service, compares the current standard VM with a VAD-delivered VM in stable adult patients presenting to the ambulance service with SVT. The primary outcome is cBMJ openEvaluation of the prehospital use of a Valsalva assist device in the emergency treatment of supraventricular tachycardia (EVADE SVT): study protocol for a stepped wedge cluster randomised controlled trial.PMC10255124NIHR202185Dawe PYoung CTaylor TBoyling TRutherford TGodfrey DWillows PHoad THoulgate KAppelboam AGodfrey RRyder JBurn JWalker KAbbott GSlocombe LHoskin RStimson SBoot SDavies LMcCann ACartwright JMorrison NRodda TAllsopp RMiller NSummers BMason LCole AMullarney JGillett ALegg JRooney GJones BMiller ODriver TMarchant TBirch CRhodes SHare LPrice WTrudgill JHolzer LLaurenson KScotney NPhipps JCopley CMacey-Woolmer CKivell WChappell KHill SJIngram ACarrielies JChedzoy CEVADE SVT Study CollaboratorsAdams MDay CDurrant CAUkoumunne OReilly MHoare THawker RArmstrong NBeeley FPatterson LCox MBlack SBarber JO'Reilly DMeering JBarber HRichards NBessell LBrown HCoppola AAstley BClarke LCarpenter KDayer MCaine PFoxen AHowell TWatson AHill AJefferies DOu YTitcombe DGarrood LGoodwin MOsborne RWillis DEvans DKeat JBlow CTaplin CCarey DConstable JBlinman AJones VClarkson RSprake JMcKenzie-Plume VLong PScott KHawton AMurphy LKing JMorris MBolwell SWright-Stainton SFlowerdew ZHolmes MSimpkins LBowyer SWithams SPayne TPalmer SLawrence SSmith MCranston TCreanor SCockcroft EChapman PHarris HPiper AWaring AfalseEvaluation of the prehospital use of a Valsalva assist device in the emergency treatment of supraventricular tachycardia (EVADE SVT): study protocol for a stepped wedge cluster randomised controlled trial.<h4>Introduction</h4>Patients with episodes of supraventricular tachycardia (SVT), a common heart arrhythmia, are often attended by ambulance services. International guidelines advocate treatment with the Valsalva manoeuvre (VM), but this simple physical treatment has a low success rate, with most patients requiring conveyance to hospital. The Valsalva Assist Device (VAD) is a simple device that might help practitioners and patients perform a more effective VM and reduce the need for patients to be taken to hospital.<h4>Methods and analysis</h4>This stepped wedge cluster randomised controlled trial, conducted within a UK ambulance service, compares the current standard VM with a VAD-delivered VM in stable adult patients presenting to the ambulance service with SVT. The primary outcome is c2023-01-01T00:00:00Z2023 Jun2026-05-05T18:14:26.236Z2026-04-07T21:46:14.786ZS-EPMC102551243729094910.1136/bmjopen-2023-073315