Department of Anesthesia and Intensive Care Post Graduate Institute of Medical Education and Research Chandigarh India;
Department of Cardiac Anesthesia All India Institute of Medical Sciences New Delhi India;
Department of Ophthalmology Advanced Eye Center Post Graduate Institute of Medical Education and Research Chandi-garh India;
Transoesophageal Echocardiography; Superior Vena Cava; Trans Thoracic Echocardiography; Computed Tomography; Right Atrium; Inferior Vena Cava;