Mechanical ventilation, Chest tube placement, Thoracentesis, Paracentesis, Lumbar puncture, Right heart catheterization..., Bronchoscopy, Transesophageal echocardiogram, Echocardiogram, Endotracheal intubation, Central venous catheterization, Pulmonary artery catheter insertion, Arterial line placement, Bronchoalveolar lavage, Temporary venous pacing, Heart failure, Atrial fibrillation, Pericardial effusion, Heart attack, Atrial flutter, Myocarditis, STEMI, Coronary artery disease, Aortic dissection, Ventricular tachycardia, Ventricular fibrillation, Cardiogenic shock, Heart block