RT Journal Article SR Electronic T1 Tissue characterisation and primary percutaneous coronary intervention guidance using intravascular ultrasound: rationale and design of the SPECTRUM study JF Open Heart JO Open Heart FD British Cardiovascular Society SP e001955 DO 10.1136/openhrt-2021-001955 VO 9 IS 1 A1 Groenland, Frederik T W A1 Mahmoud, Karim D A1 Neleman, Tara A1 Ziedses des Plantes, Annemieke C A1 Scoccia, Alessandra A1 Ligthart, Jurgen A1 Witberg, Karen T A1 Nuis, Rutger-Jan A1 den Dekker, Wijnand K A1 Wilschut, Jeroen M A1 Diletti, Roberto A1 Zijlstra, Felix A1 Kardys, Isabella A1 Cummins, Paul A1 Van Mieghem, Nicolas M A1 Daemen, Joost YR 2022 UL http://openheart.bmj.com/content/9/1/e001955.abstract AB Introduction Intravascular ultrasound (IVUS) improves clinical outcome in patients undergoing percutaneous coronary intervention (PCI) but dedicated prospective studies assessing the safety and efficacy of IVUS guidance during primary PCI are lacking.Methods and analysis The SPECTRUM study is a prospective investigator-initiated single-centre single-arm observational cohort study aiming to enrol 200 patients presenting with ST-segment elevation myocardial infarct undergoing IVUS-guided primary PCI. IVUS will be performed at baseline, postintervention and postoptimisation (if applicable), using a 40–60 MHz high-definition (HD) system. Baseline tissue characterisation includes the morphological description of culprit lesion plaque characteristics and thrombus as assessed with HD-IVUS. The primary endpoint is target vessel failure at 12 months (defined as a composite of cardiac death, target vessel myocardial infarction and clinically driven target vessel revascularisation). The secondary outcome of interest is IVUS-guided optimisation, defined as IVUS-guided additional balloon dilatation or stent placement. Other endpoints include clinical and procedural outcomes along with post-PCI IVUS findings.Ethics and dissemination The protocol of this study was approved by the Ethics Committee of the Erasmus University Medical Center, Rotterdam, the Netherlands. Written informed consent is obtained from all patients. Study findings will be submitted to international peer-reviewed journals in the field of cardiovascular imaging and interventions and will be presented at international scientific meetings.Trial registration number NCT05007535.Data sharing not applicable as no datasets generated and/or analysed for this study protocol.