Good afternoon. My dad was hospitalized 2 weeks ago after him reporting shortness of breath and dizziness. We had to call 911. The paramedics noticed his level of oxygen was below normal and suggested by the EKG reading that he was low on potassium. When he arrived to the ER they determined that he was low in potassium as well as vitamin K due to Warfarin, a medication he has to take to thinner his blood due to a mechanical valve in his heart. He was moved from the ER to a room that same day, but his oxygen level continued to declined. He was tested for Covid twice with negative results. He is now connected to a respirator and a couple of pulmonologists can only say his lungs are inflamed and that there isn’t much they can do but wait. They suspect Amiodarone toxicity, since he has been taking it for over 2 years for tachycardia. His oxygen level ranges 86-90% at 100% O2. I any help or suggestions as to what this might be, or maybe a specialist, please?