Dr Alec Schmaier, a cardiology and vascular specialist, has studied the impact that COVID-19 has on the endothelium.  This week we called on his knowledge of the vascular system and coagulation issues to talk us through the potential role of the endothelium in Long Covid.  We wanted to take a step back and look at why clotting might be playing a role in our Long Covid symptoms, and discuss what drives it.  Schmaier offers us that and more in a discussion that includes anticoagulant drugs, the stiffening of arteries and comparisons with endothelial damage in conditions such as sepsis.