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