HardCardiovascularAcute decompensated heart failure with shockuk-plab-1
A 79-year-old man with a history of heart failure with reduced ejection fraction presents with marked dyspnoea at rest, orthopnoea and confusion. He has cool peripheries, a respiratory rate of 32 breaths per minute, oxygen saturation 88% on air, pulse 120 bpm and blood pressure 80/50 mmHg. Jugular venous pressure is raised and there are widespread crackles. What is the single most appropriate immediate management step?