Abbreviations:
TTE: Trans-Thoracic Echo, TEE: Trans-Esophageal Echo,RA: Right Atrium, LA: Left Atrium, CMR/ MRI:Cardiac Magnetic Resonance Imaging, MRI: CT: Computed Tomography, S.Cr.: Serum Creatinine, DM: Diabetes Mellitus, HTN: Hypertension, BMI: Body Mass Index,CPB: Cardio Pulmonary Bypass, ST: Sternotomy,MI/CS: Minimal Invasive/ Cardiac Surgery, SVC:Superior Vena Cava, IVC: Inferior Vena Cava, ICU:Intensive Care Unit, COPD : Chronic Obstructive Pulmonary Disease.