Central venous catheterization, Ultrasound, General anesthesia administration, Mechanical ventilation, Chest tube place...ment, Stellate ganglion block, Heart failure, Coronary artery disease, Aneurysm, Brain AVM, Pulmonary embolism, Mitral valve disease, Tricuspid valve disease, Moyamoya disease, Cardiogenic shock, Aortic valve disease, Septic shock, Shock, Respiratory failure, Hemorrhagic shock