Turning his head to look at the operating table again.
The surgery had now reached the critical stage.
The surgeons exerted great effort to remove the old artificial mitral valve from the patient's stopped heart, which was stubbornly stuck with blood clots.
The doctors had to cautiously remove it to avoid leaving any clots behind. Otherwise, once the heart resumed pumping, the clots could be propelled by the heart's blood flow, inevitably causing a pulmonary embolism or cerebral thrombosis.
