Chicago-area pulmonologist and intensive care physician Dr. Martin J. Tobin was prosecutors’ first witness called to stand in the Derek Chauvin trial on Thursday.
When asked by the state if he had formed a medical opinion on what caused George Floyd’s death, Dr Tobin said that “Mr. Floyd died from low oxygen levels, which caused damage to his brain which we see, and this also caused PEA arrhythmia because his heart stopped, ”referring to electrical activity without pulse or cardiac arrest.
The low oxygen level was caused by “shallow breathing,” he said. Mr. Floyd’s lying position and being handcuffed and Mr. Chauvin’s knee on his neck and back contributed to his shallow breathing.
Dr Tobin attended University College Dublin School of Medicine and is an expert in acute respiratory failure, mechanical ventilation and neuromuscular control of respiration.
He is certified by the American Board of Internal Medicine and the American Board of Internal Medicine Subspecialty Pulmonary Disease.