Meet Our Fellows

Cardiovascular Disease Fellowship 2026-2027

Front Row L to R: Stephen O'Connor, MD (1st Year Fellow), Emily Lowe, MD (1st Year Fellow), Jonathan Vo, MD (1st Year Fellow), Charles Warner, MD (2nd Year Fellow), Andrew Pannabecker, MD (3rd Year Fellow)
Back Row L to R: Luke Landrigan, MD (2nd Year Fellow), Joshua Mueller, MD (1st Year Fellow),   Eric Bain, MD (3rd Year Chief Fellow), Blaine Massey, DO (3rd Year Fellow)

Third Year Fellows

Eric Bain, MD, Chief Fellow

IM Residency: Indiana University School of Medicine, IN
Medical School: Indiana University School of Medicine, IN
Undergraduate: Purdue University, IN 
I am delighted to expand my cardiac expertise with a fellowship at St. Vincent Hospital. As a native to Indiana raised in the suburbs of Indianapolis and a Purdue alumni, I would regularly hear of the clinical excellence and success of the Care Group. This was solidified during my medical school and residency training during which I interacted with many of the nationally recognized staff during conferences and away rotations. The staff are forging scientific advancements in multiple subspecialties including electrophysiology, interventional, and advanced heart failure. At a site with such large volumes and critically ill patients, I knew the training would form a solid well rounded cardiology foundation. Beyond the clinical excellence, I have found the most notable quality to be the staff’s comradery and authenticity towards each other and the trainees. When not daydreaming about the heart, I spend my time with my wife and children exploring national parks, playing chess, reading, and running.

Blaine Massey, DO

IM Residency: Kirk Kerkorian School of Medicine at UNLV, NV
Medical School: Western University of Health Science College of Medicine, Lebanon, OR
Undergraduate: Whitworth University, WA
I was raised in Boise, ID and went to undergrad at Whitworth University in Spokane, WA. I attended medical school at Western University of Health Sciences in Lebanon, OR, and completed my internal medicine residency at the Kirk Kerkorian School of Medicine at UNLV. A few of the reasons I chose Ascension St. Vincent for fellowship include the phenomenal education and devoted faculty, supportive learning environment, and advanced fellowships. I am particularly impressed by the breadth of training experiences, acuity of cases, and diversity of pathology. Ascension St. Vincent cardiology fellowship is a top tier program with training by leaders in the field. In addition, Indianapolis is a wonderful place to live and raise a family. Outside of work, I enjoy fishing, mountain biking, cycling, ceramics, exercising, and spending time with my wife and child.

Andrew Pannabecker, MD

IM Residency: UT Houston Health and Science Center, TX
Medical School: Indiana University School of Medicine, IN
Undergraduate: Bethel College, IN 
After being raised in Elkhart, IN, I attended Bethel College for my undergraduate education prior to completing medical school at Indiana University School of Medicine. After Completing residency, in Houston, TX, I returned to Indiana and have worked as a cardiac nocturnist at St Vincent here in Indianapolis. During that time I have had ongoing interaction with both the cardiology group and the fellowship program. I have been fortunate to continue my training at St Vincent which consists of a truly unique combination of education and clinical exposure. While my work experience has consisted of managing the acute components of cardiac medicine, I am looking forward to exploring all of the aspects of cardiology. In my free time I enjoy hiking with my dogs and wife, mountain biking, downhill skiing, and photographing the great outdoors.

Second Year Fellows

Luke Landrigan, MD

IM Residency: Indiana University School of Medicine, Indianapolis
Medical School: Indiana University School of Medicine, Fort Wayne
Undergraduate: IUPUI, Fort Wayne
I am originally from Fort Wayne, Indiana and completed both medical school and internal medicine residency through Indiana University. As a lifelong Hoosier, I have had repeated experiences with patients, family members, and colleagues who have spoken highly of St. Vincent’s cardiovascular program. As I progressed through training and developed a passion for cardiology, it became even more clear that this institution offers world class cardiac care in a multitude of subspecialties with outstanding, field-leading physicians who not only excel in patient care but have developed a culture of respect and collegiality. I am incredibly grateful and excited to have this opportunity to train under such a well-rounded and experienced group of mentors. Outside of medicine, my wife and I spend most of our time visiting extended family and being outdoors as much as possible. I also enjoy playing basketball, golf, and hiking.

Joshua Mueller, MD

IM Residency: University of Arkansas-Northwest, Fayetteville
Medical School: University of Arkansas College of Medicine, Little Rock
Undergraduate: University of Arkansas Main Campus, Fayetteville
I grew up in Northwest Arkansas and remained in my home state for my undergraduate studies, medical school, and internal medicine residency at the University of Arkansas. As an undergraduate, I studied chemical engineering, and during medical training, I developed a deep fascination with the relationship between cardiology and the principles of fluid mechanics I encountered in engineering. I chose Ascension St. Vincent for cardiology fellowship because of its exceptional, teaching-focused faculty, the breadth of clinical exposure, and the strong sense of camaraderie among the fellows. Outside the hospital, I enjoy playing golf, running, and backpacking.

Charles Warner, MD

IM Residency: Abbott Northwestern, Minneapolis
Medical School: University of Minnesota Med School, Minneapolis
Undergraduate: University of Notre Dame, South Bend
I was born and raised in Minnesota, in the suburbs just outside of Minneapolis. I then spent a few years in northern Indiana while attending undergraduate at the University of Notre Dame, before moving back to Minnesota for my medical training. When I began searching for Cardiology Fellowship programs, I quickly realized what an incredible opportunity Ascension St. Vincent had to offer. After being fortunate enough to be offered an interview, I felt drawn to the program immediately. It was quite apparent that everyone involved in the program was earnestly invested in not only training highly competent cardiologists, but also ensuring a healthy and supportive work environment. Fellowship can be challenging, but the educators and staff are responsive and supportive, and want their fellows to succeed. Ascension St. Vincent offers comprehensive training and exposure in many of the cardiac subspecialties including electrophysiology, interventional, advanced heart failure and transplant, with a diverse patient population. The staff have a great reputation for being excellent educators and are dedicated to supporting their fellows achieve their career goals. When I am not at work, I enjoy spending time with my wife and large friendly dog. While I am not new to the state of Indiana, we are new to the Indianapolis area and look forward to experiencing everything it has to offer. 
 

First Year Fellows

Emily Lowe, MD

IM Residency: University of Colorado
Medical School: University of Kentucky College of Medicine Undergraduate: University of Kentucky

I grew up in a small town just outside of Louisville, Kentucky, and attended the University of Kentucky for medical school (Go Wildcats!). I then moved west to complete internal medicine residency at the University of Colorado, where I also served as a chief resident focused on health systems improvement and quality initiatives. My husband is originally from Indiana, making this move an exciting opportunity to be closer to family while beginning the next chapter of my training.

When searching for a cardiology fellowship, Ascension St. Vincent stood out for its outstanding faculty, commitment to education, and culture of mentorship. I was especially drawn to the program’s leaders in cardiovascular medicine, including Dr. Walsh’s work advancing women in cardiology, as well as the individualized echocardiography training, opportunities for advanced subspecialty development, and a leadership team deeply invested in fellow success. Combined with its collaborative, close-knit culture, St. Vincent was the ideal place to continue my training.

Outside of medicine, I enjoy spending time with family and friends, spoiling my two dogs (izzy & Echo), playing golf, and exploring new restaurants. 

Stephen O'Connor, MD

IM Residency: University of Virginia

Medical School: Indiana University SoM

Undergraduate: Butler University

After spending my childhood in Jasper, IN, I attended Butler University right here in Indianapolis. I attended IU School of Medicine and followed that up with my internal medicine residency at the University of Virginia in Charlottesville. I am extremely excited to move back home and continue my training at Ascension St. Vincent cardiology. I chose this program for its well renowned faculty who place a great emphasis on teaching and training the future of cardiology. In my short time here, everything I loved while interviewing has proven true and more. Everyone I’ve met is approachable, invested in my success and contribute to a culture built on mutual respect and a desire to learn. I currently am enjoying exploring all aspects of cardiology and have a particular passion for metabolic disease and preventative cardiology.

In my free time I enjoy spending time with my wife, Mary Elise and my puppy, Butter, as well as woodworking, watching all kinds of sports, playing board games, reading, and spending time with friends and family. 

Jonathan Vo, MD


IM Program
: Cedars-Sinai Medical Center

Medical School: Renaissance SoM at Stony Brook Univ.

Undergraduate: Indiana University