ABVLM Glossary of Abbreviations AAGSV Anterior Accessory Great Saphenous Vein EHIT Endovenous Heat-Induced Thrombus ABI Ankle-Brachial Index EKG Electrocardiogram ACCP American College of Chest Physicians EVA Endovenous Ablation AM Morning (Ante Meridiem) EVTA Endovenous Thermal Ablation AMA American Medical Association FDA Food & Drug Administration aPTT Activated Partial Thromboplastin Time FFP Fresh Frozen Plasma AV Arteriovenous GSV Great Saphenous Vein AVF American Venous Forum HIT Heparin-Induced Thrombocytopenia AVM Arteriovenous Malformation Hz Hertz AVP Ambulatory Venous Pressure IFU Indications for Use BP Blood Pressure INR International Normalized Ratio BMI Body Mass Index IVC Inferior Vena Cava CCSVI Chronic Cerebrospinal Venous Insufficiency IVUS Intravascular Ultrasound CHIVA Cure Conservative et Hémodynamique de J Joules l'Insuffiscense Veineuse en Ambulatoire kg Kilogram CDT Catheter-Directed Thrombolysis KTS Klippel-Trenaunay Syndrome CFA Common Femoral Artery LDS Lipodermatosclerosis CFV Common Femoral Vein LMWH Low Molecular Weight Heparin CHF Congestive Heart Failure LVEF Left Ventricular Ejection Fraction cm Centimeter µM Micron CT Computed Tomography mg Milligram CVA Cerebral Vascular Accident MHz Megahertz CVI Chronic Venous Insufficiency mL Milliliter DUS Duplex Ultrasound mm Millimeter DVT Deep Vein Thrombosis mmHg Millimeters of Mercury 2016 Glossary of Abbreviations | 1 of 2 Revised 1.29.2016 ABVLM Glossary of Abbreviations MRA Magnetic Resonance Angiography SEPS Subfascial Endoscopic Perforator Surgery MRI Magnetic Resonance Imaging SFJ Saphenofemoral Junction MRV Magnetic Resonance Venography SOB Shortness of Breath ms Millisecond SPJ Saphenopopliteal Junction nm Nanometer SSV Small Saphenous Vein NSAID Non-Steroidal Anti-Inflammatory Drug(s) STS Sodium Tetradecyl Sulfate OR Operating Room SVC Superior Vena Cava PAD Peripheral Arterial Disease SVS Society of Vascular Surgery PCC Prothrombin Complex Concentrate SVT Superficial Venous Thrombophlebitis PE Pulmonary Embolism TGF-α Transforming Growth Factor – Alpha PET Positron Emission Tomography TGF-β1 Transforming Growth Factor – Beta PICC Peripherally-Inserted Central Catheter TNF-α Tumor Necrosis Factor – Alpha PFO Patent Foramen Ovale TNF-β1 Tumor Necrosis Factor – Beta PMT Pharmacomechanical Thrombolysis TT Thrombin Time PPG Photoplethysmography UFH Unfractionated Heparin PRF Pulse Repetition Frequency UGFS Ultrasound-Guided Foam Sclerotherapy PT Prothrombin Time UGS Ultrasound-Guided Sclerotherapy PTS Post-Thrombotic Syndrome VCSS Venous Clinical Severity Score PTT Partial Thromboplastin Time VFI Venous Filling Index QoL Quality of Life VTE Venous Thromboembolism REVAS Recurrent Varices After Surgery Y/O Year Old RF Radiofrequency > Greater Than RFA Radiofrequency Ablation ≥ Greater Than or Equal to S Seconds < Less Than SC Subcutaneous ≤ Less Than or Equal To 2016 Glossary of Abbreviations | 2 of 2 Revised 1.29.2016 .