So here study in Israel will start soon:
The purpose of Israel’s study is to evaluate the efficacy of HBOT in moderate-severe COVID-19 patients in a randomized controlled manner.
This Swiss study and also some studies in USA ( with hbot) still makes me think that hbot may be good therapie for COVID19 patients :
I will explain
Hère Swiss last study: ( published in Lancet)
This is new interesting study:
« The endothelial tissue of younger patients is usually capable of coping well with the attacks launched by the virus. The situation is different for patients suffering from hypertension, diabetes, heart failure or coronary heart diseases, all of which have one thing in common – their endothelial function is markedly impaired. If patients such as these become infected with SARS-COV-2, they will be particularly at risk, as their already weakened endothelial function will diminish even further, especially during the phase in which the virus reproduces the most. «
Link to Swiss article :
So in fact they talk about :
Endothelial dysfunction And capacity to produce nitric oxide (NO)….
And we have a lot of studies ( with hbot) One of them Shai study:
« In a study on rats with normal mitochondrial function, HBOT increased the production of adenosine triphosphate in muscle tissue compared to a control group . Moreover, in a clinical study by Li et al., it was demonstrated that HBOT may improve myocardial blood perfusion, reduce inflammation and vascular endothelial dysfunction, and further improve myocardial microcirculation in patients after the implantation of drug-eluting stents . Aparci et al. evaluated the changes following a series of 10 hyperbaric sessions in diabetic patients  »
So if HBOT improve myocardial blood perfusion, reduce inflammation and vascular endothelial dysfunction we are searching improve level of NO ( in all types cardiac patients) so I think for such category of patients may be hbot could be used even before any COVID19 infection ?.. ( may be than if their capacity to produce nitric oxide (NO)will be normalise or almost) we will see much more less cardiac person with bad Covid 19 outcome ????
This study as well….