Spot Dx — Is this irregular rapid pulse an ominous sign?

Jeremy, a 72-year-old retired bank manager, presents to his GP with a history of fever and cough with heavy sputum production.

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Jeremy, a 72-year-old retired bank manager, presents to his GP with a history of fever and cough with heavy sputum production. Jeremy is a lifelong smoker with known severe COPD. He has done a negative COVID-19 PCR test prior to his attendance. Aside from his COPD, he is also known to have hypertension.

 His medications include two inhalers: combination fluticasone furoate/umeclidinium/vilanterol, and salbutamol, plus oral olmesartan 20mg daily.