1. Patient aged > 18 2. Patient affiliated to a health insurance plan 3. Patient who has given their free, informed and written consent or patient for whom an independent doctor has given their signed consent as part of an emergency procedure 4. Serum Potassium> 3,5 mmol / L 5. Patient diagnosed COVID positive by RT-PCR and / or scanner

1. Patient aged > 18 2. Patient affiliated to a health insurance plan 3. Patient who has given their free, informed and written consent or patient for whom an independent doctor has given their signed consent as part of an emergency procedure 4. Serum Potassium> 3,5 mmol / L 5. Patient diagnosed COVID positive by RT-PCR and / or scanner