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Competing Interests: Conflict of interest: None declared.

A 58-year-old man presented to the emergency department with recent-onset palpitations and progressive exertional dyspnoea. ECG demonstrated new-onset atrial fibrillation. Transthoracic echocardiogram showed global impairment in left ventricular systolic function with left ventricular ejection fraction of 20%. Cardiac MRI (CMRI) demonstrated generalised severe myocarditis. A SARS-CoV-2 PCR was positive for SARS-CoV-2 RNA. As such, we diagnosed our patient with COVID-19-associated myocarditis based on CMRI appearances and positive SARS-CoV-2 swab. This case highlights that COVID-19-associated myocarditis can present as new atrial fibrillation and heart failure without the classic COVID-19-associated symptoms., Competing Interests: Competing interests: None declared., (© BMJ Publishing Group Limited 2021. No commercial re-use. See rights and permissions. Published by BMJ.)

Introduction: Sacubitril-valsartan has been shown by the PARADIGM-HF trial to decrease hospital admissions and improve mortality in patients with heart failure with reduced ejection fraction. The PARADIGM trial had stringent exclusion criteria. It is not known how applicable these trial criteria are to real-life practice. In this study, we sought to determine the percentage of patients eligible for sacubitril-valsartan therapy in a level 3 hospital without a dedicated heart failure service., Methods: All patients discharged from our service with a diagnosis of congestive cardiac using our hospital in-patient enquiry (HIPE) system underwent hierarchal analysis. In order to be deemed eligible for sacubitril-valsartan therapy, patients had to meet PARADIGM-HF inclusion criteria., Results: Our 143 patients represented a more clinically unwell, elderly cohort than the PARADIGM trial study population. Only 24 patients (16.66%) had an ejection fraction of 40% or less. Our results indicate that only 4/143 patients in a real-world setting (2.79%) were eligible for sacubitril-valsartan therapy at the point of discharge as per the PARADIGM-HF study criteria. This is primarily due to the higher than expected percentage of patients in our cohort with an ejection fraction of over 40% (n = 120) and the low percentage of patients on therapeutic doses of ACEI/ARB (n = 15)., Conclusions: Our study showed that a smaller than expected proportion of our patients in real-world practice are suitable for sacubitril-valsartan therapy at discharge. Most patients were in the HFPEF cohort which does not currently have evidence for treatment with sacubitril-valsartan. Low rates of prescribing of basic heart failure medicatons and the absence of dedicated heart failure services in a non-tertiary centre may explain the poor compliance observed. Improving guideline adherence and increasing awareness of evidence-based medication use at primary and secondary care levels would be of benefit to Irish heart failure patients.