Data collection
Patient demographics, medical history, clinical records, laboratory
tests, and ventilator data were collected and analyzed. Blood gas
analysis and echocardiography were performed at the same day. The
associations between cardiac parameters and ventilator treatment were
analyzed. The patients were followed up from the day that mechanical
ventilation was implemented to assist breathing to the day of weaning
from ventilation (1‒30 days). Death was classified as a failure to wean
the patient from the ventilator.