Preoperative echocardiography and the sitting position.
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Petrozza
D000776:Anesthesiology; D004452:Echocardiography; D004618:Embolism, Air / Q000517:prevention & control*; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis*; D006801:Humans; D007431:Intraoperative Complications / Q000517:prevention & control*; D009493:Neurosurgery; D011187:Posture; D011300:Preoperative Care