The literature demonstrates concerns for patients wihth diminished left ventricular ejection fraction in hyperbaric treatment.  What do we know about risks for patients with compensated diastolic dysfunction and preserve LVEF?  One cardiologist has advised me that if the patient is compensated, asymptomatic, has controlled BP and has good LVEFthen HBO should be relatively safe .  Is there literature in this regard I am unaware of?  What is the experience of hyperbaric clinicians?