A 66-year-old female patient was admitted to hospital care in March 2021 due to aggravating fatigue and dyspnoea. Her past medical history was relevant for chronic anaemia, smoking, dyslipidaemia, antiphospholipid syndrome and lupus-like mixed connective tissue disease, for which she was taking corticosteroids. She had suffered an acute coronary syndrome in August 2020, complicated with postinfarction pericardi...