James T. Maddux, M.D. Providence Employed Provider

Languages: English
Accepting New Patients
Professional Statement
After moving back to Missoula following Medical School at Jefferson Medical School in Philadelphia, Residency and Chief Residency at the University of Minnesota and Fellowships in Cardiovascular Medicine and Interventional Cardiology at the University of Colorado Health Sciences Center, I have made it my mission to bring the best possible cardiac care to our patients in Montana. My practice specializes in the growing specialty of Structural Heart Disease and Coronary Intervention: • Percutaneous Valve Therapies such as Transcatheter Aortic Valve Replacement (TAVR) • Transcatheter Mitral Valve Replacement (TMVR) • Transcatheter Tricuspid Valve Replacement (TTVR) • Percutaneous Mitral Valve Repair with MitraClip • Aortic Valvuloplasty • Mitral Valvuloplasty • Intra-Cardiac Defect Closure o ASD Closure o PFO Closure o PDA Closure o VSD Closure o Paravalvular Leak Closure • Left Atrial Appendage Occlusion • Alcohol Septal Ablation • Complex Chronic Total Occlusion Coronary Intervention. • Permanent Pacemaker Implantation • Loop Recorder Implantation Additionally, I am actively involved in clinical research at the International Heart Institute of Montana and have been Principal Investigator in numerous clinical research trials.
Field of Study
Thomas Jefferson University - Philadelphia, PA
Medical School
University Of Minnesota Hospital & Clinic - Minneapolis, MN
Internal Medicine
University Of Colorado Health Sciences Center - Denver, CO
Interventional Cardiology, Cardiovascular Disease
Personal Interests
Having grown up in Montana, my family and I avail ourselves to all the natural wonders this state has to offer.

Fishing of course is in the blood, as any native Montanan will tell you.
Board Certifications
  • American Board of Internal Medicine, Interventional Cardiology
  • American Board of Internal Medicine, Cardiovascular Disease
Clinical Interests
  • Abnormal Calcium Score
  • Abnormal Coronary Angiography
  • Abnormal Ecg
  • Abnormal Stress Test
  • Acute Bacterial Endocarditis
  • Adenosine Stress Test
  • Advanced Lipid Testing
  • Anomalous Coronary Artery
  • Aortic Diseases
  • Aortic Stenosis
  • Aortic Valve Disorder
  • Arrhythmia
  • Atherosclerosis
  • Atherosclerosis Of Aorta
  • Athletic Heart Syndrome
  • Atrial Fibrillation
  • Atrial Flutter
  • Atrial Tachycardia
  • Atrioventricular Block
  • Atrioventricular Septal Defect
  • Autoimmune Pericarditis
  • Av Nodal Arrhythmia
  • Bradycardia
  • Cardiac Angina
  • Cardiac Arrest
  • Cardiac Catheterization
  • Cardiac Conduction Defects
  • Cardiac Ct
  • Cardiac Disease In Pregnancy
  • Cardiac Genetics
  • Cardiac Insufficiency
  • Cardiac Mri
  • Cardiac Risk Assessment
  • Cardiac Sarcoma
  • Cardiac Tumor
  • Cardio-Oncology
  • Cardiomegaly
  • Cardiomyopathy
  • Cardiopulmonary Exercise Testing
  • Cardiorenal Syndrome
  • Cardiospasm
  • Carotid Intimal Thickness
  • Centrimag Ventricular Assist Device
  • Chest Pain
  • Cholesterol Disorders
  • Cholesterol Management
  • Chronic Total Occlusion
  • Complete Atrioventricular Block
  • Conduction Defects
  • Congestive Heart Failure
  • Coronary Angiography
  • Coronary Artery Anomaly
  • Coronary Artery Disease
  • Coronary Artery Fistula
  • Coronary Calcium Score
  • Coxsackie Endocarditis
  • Diabetic Cardiomyopathy
  • Directional Atherectomy
  • Dobutamine Stress Test
  • Dysautonomia
  • Dyspnea On Exertion
  • Echocardiography
  • Elevated Creatine Kinase
  • Enhanced External Counterpulsation
  • Exercise Intolerance
  • Familial Arrhythmia
  • Family History Heart Disease
  • Heart Murmur
  • Heart Racing
  • Holter Monitor
  • Hypertension
  • Hypertrophic Cardiomyopathy
  • In-Office Echocardiogram
  • In-Office Stress Test
  • Infiltrative Disorders Of The Heart
  • Intra-Aortic Balloon Pump
  • Intravascular Ultrasound
  • Ischemic Cardiomyopathy
  • Laser Atherectomy
  • Left Atrial Appendage Closure
  • Left Bundle Branch Block
  • Left-Sided Heart Failure
  • Malignant Hypertension
  • Mechanical Circulatory Support
  • Microvascular Dysfunction
  • Mitral Regurgitation
  • Mitral Valve Insufficiency
  • Mitral Valve Prolapse
  • Mitral Valve Regurgitation
  • Mthfr Mutation
  • Myocardial Infarction
  • Myocarditis
  • Myxoma
  • Nuclear Cardiology Test Reading
  • Orthopnea
  • Orthostatic Hypotension
  • Palpitations
  • Papillary Muscle Disorders
  • Paroxysmal Supraventricular Tachycardia
  • Paroxysmal Tachycardia
  • Patent Ductus Arteriosus
  • Patent Foramen Ovale
  • Pericardial Effusion
  • Pericarditis
  • Postural Tachycardia Syndrome
  • Pre-Excitation Syndrome
  • Premature Atrial Contraction
  • Premature Beats
  • Premature Ventricular Contractions
  • Preoperative Evaluation
  • Preventative Cardiology
  • Prinzmetals Angina
  • Pulmonary Artery Stenosis
  • Pulmonary Edema
  • Pulmonary Valve Disorders
  • Pulmonary Valve Insufficiency
  • Pulmonary Valve Stenosis
  • Refractory Angina
  • Rheumatic Mitral Regurgitation
  • Rheumatic Mitral Stenosis
  • Rheumatic Mitral Stenosis With Insufficiency
  • Rhythm Disorder
  • Right Bundle Branch Block
  • Right Heart Failure
  • Right Ventricular Hypertrophy
  • Rotational Atherectomy
  • Secondary Hypertension
  • Stress Echo Cardiogram
  • Sudden Cardiac Death
  • Supraventricular Tachycardia
  • Syncope
  • Tachycardia
  • Tee
  • Thrombosis
  • Tilt Table Test
  • Transcatheter Aortic Valve Replacement
  • Transesophageal Echocardiography
  • Transposition Of Great Vessels
  • Transthoracic Echocardiogram
  • Tricuspid Regurgitation
  • Tricuspid Valve Disease
  • Valve Stenosis
  • Valvular Endocarditis
  • Vasovagal Syncope
  • Ventricular Tachycardia
  • Vo2 Measurement
  • Watchman Device Implantation
  • Wolff-Parkinson-White Syndrome

The Patient Rating score is based on responses given during the CAHPS Patient Experience Survey.Responses are measured on a 10 - point scale, with 10 being the best score. These scores are then translated to a 5 - point scale in order to display results in a 5 - star rating.Comments are also gathered from the same survey and displayed in their entirety with the exception of any language that may be considered slander, libel or contain private health information, which will be removed prior to publishing the comments.

4.9 out of 5 (83 Ratings, 18 Comments)


Dr. Maddux is the finest - Long history with Dr. Maddux and he is the best!!

Dr. Maddux and every member of his team was professional, answered all my questions. I feel I received the best care available. [...]

Could not ask for any better.

All good.

Very good.

I get excellent care at the heart institute.

Makes life worth living.

Dr maddax is a good doctor and interesting to talk to.

He is compassionate.

It was a very good visit.

Great physician and I feel honored to have him in my corner.

He answered all my questions. Friendly and can talk to him in ease.

He is one of the best Doctors for his profession , I respect him and trust him very much.

Things where taken care of quickly.

very, very good no complaints whatso ever

Always excellent, informative, caring, cheerful.

Best providers in Missoula.

Very good.
500 West Broadway Street
Missoula, MT 59802
(406) 329-2791
International Heart Institute - Polson, St. Joseph Medical Clinic
6 13th Avenue East
Providence St. Joseph Medical Center

Polson, MT 59860
Affiliated Facilities
Providence St. Patrick Hospital
Providence St. Joseph Medical Center