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Photo of Dr. Christopher Joseph Abularrage, M.D.

Abularrage, Christopher Joseph, M.D.

Associate Professor of Surgery
Director, Diabetic Foot and Wound Clinic
Appointment Phone: 410-955-5174
Main Location: The Johns Hopkins Hospital
Expertise, Disease and Conditions: Aneurysm, Abdominal Aortic (AAA), Aneurysms, Angioplasty, Aortic Aneurysms, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arterial Aneurysm, Arterial Occlusive Disease, Atherosclerosis, Carotid Artery Disease, Carotid Artery Stenosis, Carotid Artery Stenting, Carotid Body Tumors, Carotid Endarterectomy, Chronic Total Occlusions, Claudication, Diabetes, Diabetes and Heart Research, Diabetic Foot Care, Diabetic Foot Ulcers, Diabetic Wound Care, Emboli-Protection Devices, Endovascular Interventions, Endovascular Surgery, Endovascular Therapies, Extractional Atherectomy, General Vascular Surgery, Intermittent Claudication, Laser Atherectomy, Limb Salvage Surgery, Lower Extremity Angioplasty, Lower Extremity Revascularization, Lower Extremity Stenting, Mesenteric Arterial Insufficiency, Minimally Invasive Endovascular Aneurysm Repair, Minimally Invasive Interventions, Non-Invasive Flow Studies (NIFS), Peripheral Angiography, Peripheral Arterial Aneurysms, Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Redo Lower Extremity Vascular Reconstruction, Renal Artery Disease, Renal Vascular Disease, Rotational Atherectomy, Stenting, Stroke, Thoracic Aortic Aneurysms, Thoracic Imaging, Thoracic Surgery, Treatment of Bypass Graft Disease with Distal Protection Devices, Vascular Disease, Vascular Surgery, Venous Thromboembolism, Visceral Angioplasty, Visceral Stenting, Visceral Vessel Reconstruction
 
Photo of Dr. Margaret Walkup Arnold, M.D.

Arnold, Margaret Walkup, M.D.

Assistant Professor of Surgery
Local Surgical Residency Program Director, Johns Hopkins Bayview Medical Center
Associate Program Director, Halsted General Surgery Residency Program
Appointment Phone: 410-550-4335
Main Location: Johns Hopkins Bayview Medical Center
Expertise, Disease and Conditions: Aneurysm, Abdominal Aortic (AAA), Aneurysms, Angioplasty, Aortic Aneurysms, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arterial Aneurysm, Arterial Occlusive Disease, Arterial Ultrasound, Arteriovenous Fistulas, Atherosclerosis, Atherosclerosis Imaging, Carotid Artery Disease, Carotid Artery Stenosis, Carotid Artery Stenting, Carotid Endarterectomy, Carotid Ultrasound, Cerebrovascular Diseases, Claudication, Deep Vein Thrombosis (DVT), Thrombophlebitis, Diabetic Foot Ulcers, Dialysis Access, Endovascular Interventions, Endovascular Stent Grafts, Endovascular Surgery, Endovascular Therapies, Extractional Atherectomy, Femoral Artery Aneurysms, General Vascular Surgery, Limb Salvage Revascularization, Limb Threatening Ischemia, Lower Extremity Angioplasty, Lower Extremity Revascularization, Lower Extremity Stenting, Mesenteric Arterial Insufficiency, Minimally Invasive Endovascular Aneurysm Repair, Minimally Invasive Interventions, Non-Invasive Flow Studies (NIFS), Peripheral Angiography, Peripheral Arterial Aneurysms, Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Popliteal Artery Aneurysms, Renal Artery Disease, Stenting, Stroke, Thoracic Aortic Aneurysms, Thoracic Outlet Syndrome, Varicose Veins, Vascular Disease, Vascular Medicine, Vascular Surgery, Vascular Ultrasound, Venous Disease, Venous Insufficiency, Venous Thromboembolism, Visceral Angioplasty
 
Photo of Dr. Nikhil Bhagat, M.D.

Bhagat, Nikhil, M.D.

Expertise, Disease and Conditions: Claudication, Intermittent Claudication, Interventional Radiology, Lower Extremity Angioplasty, Lower Extremity Stenting, Stenting, Varicocele, Vascular and Interventional Radiology, Visceral Angioplasty, Visceral Stenting
 
Photo of Dr. James Hamilton Black, III, M.D.

Black, James Hamilton, M.D. III

Associate Professor of Surgery
Chief of the Division of Vascular Surgery and Endovascular Therapy
David Goldfarb, MD Research Professor of Surgery
Attending Surgeon
Appointment Phone: 410-955-5165
Main Location: The Johns Hopkins Hospital
Expertise, Disease and Conditions: Abdominal Aneurysms, Aneurysm, Abdominal Aortic (AAA), Aneurysms, Angioplasty, Aortic Aneurysms, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arterial Aneurysm, Arteriovenous Fistulas, Claudication, Deep Vein Thrombosis (DVT), Thrombophlebitis, Endovascular Therapies, Extractional Atherectomy, General Vascular Surgery, Hypertension, Inherited Heart Diseases, Intermittent Claudication, Laser Atherectomy, Limb Salvage Surgery, Lower Extremity Angioplasty, Lower Extremity Revascularization, Lower Extremity Stenting, Marfan Syndrome, Mesenteric Arterial Insufficiency, Minimally Invasive Endovascular Aneurysm Repair, Non-Invasive Flow Studies (NIFS), Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Popliteal Artery Aneurysms, Redo Lower Extremity Vascular Reconstruction, Renal Artery Disease, Stenting, Syncope, Thoracic Aortic Aneurysms, Thoracic Imaging, Thoracic Surgery, Vascular Disease, Vascular Surgery, Vascular Ultrasound, Vasculitis, Venous Disease, Venous Insufficiency, Visceral Stenting, Visceral Vessel Reconstruction
 
Photo of Dr. Jeffrey A Brinker, M.D.

Brinker, Jeffrey A, M.D.

Professor of Medicine
Joint Appointment in Radiology and Radiological Science
Appointment Phone: 443-997-0270
Main Location: Johns Hopkins Outpatient Center
Expertise, Disease and Conditions: Acute Coronary Care, Acute Coronary Syndrome, Acute Myocardial Infarction, Angina, Angioplasty, Atherosclerosis, Atherosclerosis Imaging, Cardiac Catheterization, Cardiac Disease, Cardiac Imaging, Cardiology, Cardiomyopathy, Cardiovascular Computed Tomography, Cardiovascular Disease in Women, Cardiovascular Disease with Chronic Renal Disease, Cardiovascular Diseases, Cardiovascular Interventions, Cardiovascular Medicine, Cardioversion, Chest Pain, Chronic Total Coronary Occlusion, Chronic Total Occlusions, Clinical Cardiology, Congenital Heart Disease, Congenital Heart Disease - Adult, Congestive Heart Failure, Coronary Angiography, Coronary Artery Disease, Coronary Artery Stenting, Coronary CT Angiography, Coronary Endothelial Function, CT Angiography, General Cardiology, Heart Attack, Heart Conditions, Heart Disease, Heart Disease Prevention and Treatment in Women, Hypertrophic Cardiomyopathy, Interventional Cardiology, Intravascular Brachytherapy, Invasive Cardiology, Ischemic Heart Disease, Lead Extraction, Myocardial Infarction, Pacemaker and ICD Lead Extraction, Pacing, Percutaneous Coronary Intervention, Pericardiocentesis, Right Heart Catheterization, Rotational Atherectomy, Stenting, Syncope, Tilt Table Test, Valvular Heart Disease
 
Photo of Dr. Rani Khalil Hasan, M.D.

Hasan, Rani Khalil, M.D.

Assistant Professor of Medicine
Appointment Phone: 443-997-0270
Main Location: The Johns Hopkins Hospital
Expertise, Disease and Conditions: Cardiac Catheterization, Cardiology, Coronary Artery Disease, Interventional Cardiology, Percutaneous Coronary Intervention, Stenting, Valvular Heart Disease
 
Photo of Dr. Heitham Talal Hassoun, M.D.

Hassoun, Heitham Talal, M.D.

Associate Professor of Surgery
Medical Director, Global Services
Appointment Phone: 410-955-2618
Main Location: The Johns Hopkins Hospital
Expertise, Disease and Conditions: Angioplasty, Aortic Aneurysms, Carotid Artery Stenosis, Claudication, Extractional Atherectomy, General Vascular Surgery, Non-Invasive Flow Studies (NIFS), Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Stenting, Vascular Disease, Vascular Surgery
 
Photo of Dr. Chao-Wei Hwang, M.D.

Hwang, Chao-Wei, M.D.

Assistant Professor of Medicine
Assistant Professor of Biomedical Engineering
Appointment Phone: 410-955-5000
Main Location: Johns Hopkins Heart and Vascular Institute
Expertise, Disease and Conditions: Acute Coronary Care, Acute Coronary Syndrome, Acute Myocardial Infarction, Angina, Angioplasty, Atherosclerosis, Cardiac Catheterization, Cardiac Disease, Cardiology, Cardiovascular Disease in Women, Cardiovascular Diseases, Cardiovascular Interventions, Cardiovascular Medicine, Chest Pain, Chronic Total Coronary Occlusion, Chronic Total Occlusions, Circulatory Support Devices, Clinical Cardiology, Coronary Angiography, Coronary Artery Disease, Coronary Artery Disease, Premature, Coronary Artery Stenting, Dyslipidemia, Echocardiography, General Cardiology, Heart Attack, Heart Conditions, Heart Disease, Heart Disease Prevention and Treatment in Women, High Cholesterol, Hypertension, Interventional Cardiology, Invasive Cardiology, Ischemic Heart Disease, Laser Atherectomy, Myocardial Infarction, Percutaneous Coronary Intervention, Percutaneous Treatment of Valvular Stenosis, Pericardiocentesis, Peripheral Angiography, Right Heart Catheterization, Rotational Atherectomy, Stenting, Stress Testing, Stress-induced Cardiomyopathy, Trans-Radial Intervention, Transthoracic Echocardiogram, Treatment of Bypass Graft Disease with Distal Protection Devices, Valvular Heart Disease, Valvuloplasty for Valvular Stenosis
 
Photo of Dr. Peter VanDoren Johnston, M.D.

Johnston, Peter VanDoren, M.D.

Assistant Professor of Medicine
Medical Director, Cardiac Catheterization Laboratory, Howard County General Hospital
Appointment Phone: 443-997-0270
Main Location: The Johns Hopkins Hospital
Expertise, Disease and Conditions: Angioplasty, Cardiac Catheterization, Cardiology, Cardiovascular Diseases, Cardiovascular Medicine, Coronary Artery Disease, Coronary Artery Stenting, Fractional Flow Reserve, Heart Attack, Heart Disease, Interventional Cardiology, Intravascular Ultrasound (IVUS), Myocardial Infarction, Stenting
 
Photo of Dr. Ying Wei Lum, M.D.

Lum, Ying Wei, M.D.

Assistant Professor of Surgery
Appointment Phone: 410-955-5165
Main Location: The Johns Hopkins Hospital
Expertise, Disease and Conditions: Aneurysm, Abdominal Aortic (AAA), Aneurysms, Angiography, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arteriovenous Malformations, Atherosclerosis, Carotid Artery Disease, Carotid Surgery, Claudication, Deep Vein Thrombosis (DVT), Thrombophlebitis, Dialysis, Emboli-Protection Devices, Endarterectomy Angioplasty Stenting, Carotid, Endovascular Surgery, Interventional Cardiology, Kidney and Urinary System Disorders, Limb Salvage, Percutaneous Transluminal Coronary Angioplasty, Peripheral Vascular Disease, Radiology, Imaging, Revascularization, Sclerotherapy, Spider Veins, Stenting, Stroke, Thoracic Aortic Aneurysms, Thoracic Outlet Syndrome, Ultrasound, Varicose Veins, Vascular Surgery, Vascular Ultrasound, Vessel Reconstruction, Women's Heart Disease
 
Photo of Dr. Mahmoud B Malas, M.D.

Malas, Mahmoud B, M.D.

Associate Professor of Surgery
Director of Endovascular Surgery, Johns Hopkins Bayview Medical Center
Director of The Vascular and Endovascular Research Center, Johns Hopkins Bayview Medical Center
Director, Center for Surgical Trials and Outcomes Research, Clinical Section
Appointment Phone: 410-550-4335
Main Location: Johns Hopkins Bayview Medical Center
Expertise, Disease and Conditions: Aneurysm, Abdominal Aortic (AAA), Aneurysms, Angioplasty, Aortic Aneurysms, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arterial Occlusive Disease, Arterial Ultrasound, Arteriovenous Fistulas, Arteriovenous Malformations, Atherosclerosis, Atherosclerosis Imaging, Cardiovascular Disease in Women, Cardiovascular Disease with Chronic Renal Disease, Cardiovascular Diseases, Cardiovascular Interventions, Cardiovascular Medicine, Cardiovascular Surgery, Carotid Artery Disease, Carotid Artery Stenosis, Carotid Artery Stenting, Carotid Body Tumors, Carotid Endarterectomy, Carotid Ultrasound, Cerebral Vascular Disease, Chronic Total Coronary Occlusion, Claudication, Drug Eluting Stents, Endovascular Interventions, Endovascular Surgery, Endovascular Therapies, Extractional Atherectomy, Fistulas, General Vascular Surgery, Heart Disease, Intermittent Claudication, Limb Salvage Revascularization, Limb Salvage Surgery, Lower Extremity Angioplasty, Lower Extremity Revascularization, Lower Extremity Stenting, Minimally Invasive Endovascular Aneurysm Repair, Minimally Invasive Interventions, Minimally Invasive Radiofrequency Ablation, Minimally Invasive Thoracic Surgery, Non-Invasive Flow Studies (NIFS), Peripheral Angiography, Peripheral Arterial Aneurysms, Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Redo Lower Extremity Vascular Reconstruction, Renal Artery Disease, Sclerotherapy, Spider Veins, Stenting, Stroke, Subclavian Steal Syndrome, Subclavian Stenosis, Thoracic, Thoracic Aortic Aneurysms, Thoracic Outlet Syndrome, Treatment of Bypass Graft Disease with Distal Protection Devices, Varicose Veins, Vascular Disease, Vascular Malformations, Vascular Surgery, Vascular Ultrasound, Vasculitis, Venous Disease, Venous Insufficiency, Venous Thromboembolism, Visceral Angioplasty, Visceral Stenting, Visceral Vessel Reconstruction, VNUS Closure Procedure
 
Photo of Dr. Julie Marie Miller, M.D.

Miller, Julie Marie, M.D.

Associate Professor of Medicine
Appointment Phone: 443-997-0270
Main Location: Johns Hopkins Heart and Vascular Institute
Expertise, Disease and Conditions: Angina Pectoris, Angiography, Arterial Disease, Atherosclerosis, Cardiac Catheterization, Cardiology, Cardiovascular Disease, Cardiovascular Disorders, Chest Pain, Cholesterol, Claudication, Computed Tomography, Corner Occlusion, Coronary Heart Disease, Dyslipidemia, Emboli-Protection Devices, Heart Attack, High Blood Pressure, High Cholesterol, Imaging, Interventional Cardiology, Ischemic Heart Disease, Laser Surgery, Lipid Disorders, Mechanical Circulatory Support, Myocardial Infarction, Percutaneous Transluminal Coronary Angioplasty, Pericardiocentesis, Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Radiology, Renal Artery Disease, Renal Vascular Disease, Stenting, Vascular, Vascular Disorders, Women's Heart Disease
 
Photo of Dr. Bruce Alan Perler, M.D.

Perler, Bruce Alan, M.D.

Professor of Surgery
Vice Chair for Clinical Operations and Financial Affairs
Chief Emeritus, Division of Vascular Surgery & Endovascular Therapy
Director of the Noninvasive Vascular Laboratory
Julius Jacobson, II Professor of Surgery
Appointment Phone: 410-955-2618
Main Location: The Johns Hopkins Hospital
Expertise, Disease and Conditions: Aneurysm, Abdominal Aortic (AAA), Aneurysms, Angiography, Angioplasty, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arterial Ultrasound, Arteriovenous Malformations, Atherosclerosis, Cardiovascular Diseases, Carotid Artery Disease, Carotid Artery Stenosis, Carotid Ultrasound, Cerebrovascular Diseases, Claudication, Deep Vein Thrombosis (DVT), Thrombophlebitis, Diabetic Foot Problems, Diabetic Foot Ulcers, Endarterectomy Angioplasty Stenting, Carotid, Endovascular Surgery, Flow Studies, Limb Salvage, Medical Management, Vascular Conditions, Peripheral Vascular Disease, Popliteal Artery Aneurysms, Radiology, Imaging, Renal Artery Disease, Renal Vascular Disease, Revascularization, Stenting, Stroke, Thoracic Aortic Aneurysms, Ulcers, Ultrasound, Varicose Veins, Vascular Disease, Vascular Surgery, Venous Insufficiency
 
Photo of Dr. Elizabeth Virginia Ratchford, M.D.

Ratchford, Elizabeth Virginia, M.D.

Assistant Professor of Medicine
Director, Johns Hopkins Center for Vascular Medicine
Appointment Phone: 410-955-5165
Main Location: Johns Hopkins Medicine - Green Spring Station
Expertise, Disease and Conditions: Aneurysm, Abdominal Aortic (AAA), Aneurysms, Angioplasty, Aortic Aneurysms, Arterial Aneurysm, Arterial Occlusive Disease, Arterial Ultrasound, Atherosclerosis, Atherosclerosis Imaging, Cardiovascular Disease, Carotid Artery Disease, Carotid Artery Stenosis, Carotid Ultrasound, Cerebrovascular Diseases, Claudication, Deep Vein Thrombosis (DVT), Thrombophlebitis, Dyslipidemia, Extractional Atherectomy, Fibromuscular Dysplasia (FMD), High Cholesterol, Hypertension, Intermittent Claudication, Non-Invasive Flow Studies (NIFS), Peripheral Arterial Aneurysms, Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Renal Artery Disease, Risk Factor Modification, Stenting, Stroke, Subclinical Atherosclerosis, Thromboembolic Disease, Vascular Disease, Vascular Medicine, Vascular Ultrasound, Venous Disease, Venous Thromboembolism
 
Photo of Dr. Thomas Reifsnyder, M.D.

Reifsnyder, Thomas, M.D.

Assistant Professor of Surgery
Chief, Division of Vascular Surgery, Johns Hopkins Bayview Medical Center
Medical Director, Vascular Laboratory, Johns Hopkins Bayview Medical Center
Appointment Phone: 410-550-4335
Main Location: Johns Hopkins Bayview Medical Center
Expertise, Disease and Conditions: Aneurysm, Abdominal Aortic (AAA), Aneurysms, Angioplasty, Aortic Aneurysms, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arterial Aneurysm, Arterial Occlusive Disease, Arterial Ultrasound, Arteriovenous Fistulas, Atherosclerosis, Atherosclerosis Imaging, Carotid Artery Disease, Carotid Artery Stenting, Carotid Body Tumors, Carotid Endarterectomy, Carotid Ultrasound, Claudication, Deep Vein Thrombosis (DVT), Thrombophlebitis, Diabetic Foot Reconstruction, Diabetic Wound Care, Dialysis Access, Endovascular Interventions, Endovascular Surgery, Endovascular Therapies, Extractional Atherectomy, Fistulas, General Vascular Surgery, Intermittent Claudication, Limb Salvage Surgery, Lower Extremity Angioplasty, Lower Extremity Reconstruction, Lower Extremity Revascularization, Lower Extremity Stenting, Mesenteric Arterial Insufficiency, Minimally Invasive Endovascular Aneurysm Repair, Minimally Invasive Surgery, Non-Invasive Flow Studies (NIFS), Non-invasive Imaging, Open and Endovascular Surgical Techniques, Peripheral Angiography, Peripheral Arterial Aneurysms, Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Redo Lower Extremity Vascular Reconstruction, Renal Artery Disease, Risk Factor Modification, Stenting, Thoracic Outlet Syndrome, Vascular Disease, Vascular Surgery, Venous Insufficiency, Venous Thromboembolism, Visceral Angioplasty, Visceral Stenting, Visceral Vessel Reconstruction
 
Photo of Dr. Jon Rodney Resar, M.D.

Resar, Jon Rodney, M.D.

Associate Professor of Medicine
Director Interventional Cardiology
Director Adult Cardiac Catheterization Laboratory
Medical Director, Structural Heart Disease Program
Appointment Phone: 443-997-0270
Main Location: Johns Hopkins Outpatient Center
Expertise, Disease and Conditions: Acute Myocardial Infarction, Angina, Angioplasty, Aortic Coarcation, Arrhythmia, Atrial Septal Defects, Balloon Valvuloplasty, Cardiac Catheterization, Cardiomyopathy, Cardiovascular Disease, Cardiovascular Diseases, Cardiovascular Interventions, Cardiovascular Medicine, Congenital Heart Disease - Adult, Coronary Angiography, Coronary Artery Disease, Coronary Artery Stenting, Drug Eluting Stents, Extractional Atherectomy, Heart Attack, Heart Disease, Heart Failure, Interventional Cardiology, Interventional Radiology, Invasive Cardiology, Irregular Heartbeat, Ischemic Heart Disease, Laser Ablation, Mitral Stenosis, Myocardial Infarction, New Imaging Modalities, Patent Ductus Arteriosus, Patent Foramen Ovale, Percutaneous Coronary Intervention, Percutaneous Treatment of Valvular Stenosis, Pulmonary Stenosis, Rotational Atherectomy, Stenting, Treatment of Bypass Graft Disease with Distal Protection Devices, Valvular Heart Disease, Valvuloplasty for Valvular Stenosis, Ventricular Septal Defect
 
Photo of Dr. Andrew Howard Schulick, M.D.

Schulick, Andrew Howard, M.D.

Vascular Surgeon
Appointment Phone: 301-896-7619
Main Location: Johns Hopkins Community Physicians - Suburban Hospital
Expertise, Disease and Conditions: Abdominal Aneurysms, Aneurysm Repair, Angioplasty, AV Shunt, Carotid Endarterectomy, Carotid Surgery, Chronic Wounds, Deep Vein Thrombosis (DVT), Thrombophlebitis, Diabetic Foot Care, Dialysis, Endovascular Stent Grafts, Hemodialysis, Laparoscopic Inguinal Hernia, Lymphedema, Minimally Invasive Endovascular Aneurysm Repair, Peripheral Arterial Disease (PAD), Peripheral Vascular Disease, Peritoneal Dialysis, Sclerotherapy, Stenting, Thoracic Outlet Syndrome, Ulcers, Varicose Veins
 
Photo of Dr. Sunil Kumar Sinha, M.D.

Sinha, Sunil Kumar, M.D.

Assistant Professor of Medicine
Appointment Phone: 443-997-0270
Main Location: Johns Hopkins Heart and Vascular Institute
Expertise, Disease and Conditions: Ablation, Angina, Arrhythmia, Arrhythmogenic Right Ventricular Dysplasia, Atrial Fibrillation, Atrial Flutter, Atrial Tachycardia, Bradycardia, Cardiac Anesthesia, Cardiac Catheterization, Cardiac Disease, Cardiac Electrophysiology, Cardiology, Cardiomyopathy, Cardiovascular Computed Tomography, Cardiovascular Diseases, Cardiovascular Medicine, Cardioversion, Catheter Ablation Therapy, Chest Pain, Coronary Artery Disease, Coronary Artery Disease, Premature, CT Angiography, Defibrillators, Device Therapy, Echocardiography, Echocardiography and Nuclear Cardiology, Electrophysiology, Event Monitors, Heart Attack, Heart Disease, Heart Failure, Holter Monitoring, Implantable Cardioverter-Defibrillator Therapy, Invasive Cardiology, Irregular Heartbeat, Long QT Syndrome, Pacemakers, Pacing, Palpitations, Paroxysmal Supraventricular Tachycardia, Stenting, Stress Testing, Supraventricular Tachycardia, Syncope, Tachycardias, Tilt Table Test, Ventricular Arrhythmias, Ventricular Tachycardia