Cardiac Electrophysiology Fellows

Shana Greif, MD

2nd Year

Dr. Shana Greif grew up in Dobbs Ferry, New York. She graduated from Cornell University with a B.A. in psychology and obtained her M.D. from New York Medical College. She went on to complete her internal medicine residency at Kaiser Permanente Los Angeles Medical Center, where she participated in research evaluating outcomes of cryoballoon versus radiofrequency catheter ablation of atrial fibrillation. She completed her general cardiology fellowship at University of Hawaii, where she also served as Chief Cardiology Fellow and as a Clinical Faculty Instructor. During fellowship, she was involved in clinical research related to minimizing fluoroscopy use during electrophysiology procedures, including zero-fluoroscopy atrial fibrillation ablation and zero/low-fluoroscopy coronary sinus cannulation during implantation of cardiac resynchronization therapy devices. She is excited to continue her clinical and academic career as a Cardiac Electrophysiology Fellow at Stanford.

Sunil Vasireddi, MD

2nd Year

Dr. Sunil Vasireddi attended the BS/MD Honors program in Engineering and Medicine at the Illinois Institute of Technology and Chicago Medical School. For over 12 years, Dr. Vasireddi has developed innovative medical technologies by bridging diverse skillsets across multiple fields. During his undergraduate training in Biomedical Engineering, he focused on signal processing and medical physics where he studied MRI properties of cadaveric human brains in Alzheimer’s disease and helped develop a novel X-ray modality that can image soft tissue.  In medical school, he devised neural-network algorithms to map entire sea-slug brains with single-neuron resolution and discovered a new class of semi-committed neurons that play an important role in learning and memory. Next, he created algorithms for non-invasive phase-mapping of human cardiac arrhythmias using electrocardiographic imaging (ECG-I) in Dr. Yoram Rudy’s lab, and is continuing to develop a machine-learning based method to non-invasively map regional lung function using X-ray diffraction. For his contributions, he was elected to be a Senior Member of the IEEE (Institute of Electrical and Electronics Engineers). 

As part of the Physician-Scientist Pathway, Dr. Vasireddi completed his Internal Medicine residency combined with Cardiology Fellowship and post-doctoral research training at MetroHealth/Case Western in Cleveland, Ohio. During this time, he discovered that specific intrinsic cardiac stems cells can be isolated from the tips of extracted device leads and that they might regulate arrhythmias in diseases like HF and ARVC by modulating inflammation via secreting cytokines and hormones. In addition, Dr. Vasireddi created a simple mathematical model for improving LV Mass estimation using routine echocardiography and studied the clinical importance of post-operative troponin screening in non-cardiac surgery patients (featured by ACC-Ohio). For this work, Dr. Vasireddi was awarded a Clinician-Scientist training grant by the American Heart Association, and two Young Investigator Awards by both the Cardiac EP society at HRS, and the American College of Cardiology.

Hugo De Larochellière, MD, FRCPC

1st Year

Dr. Hugo De Larochellière obtained his MD degree and completed his internal medicine residency at Laval University, Quebec City, Canada. During this time, he got involved in research on the impact of blood disorders on the clinical outcomes of cardiology procedures and developed his interest in teaching as a member of a peer-learning committee and as editor of a collaborative textbook on clinical reasoning. This led him to receive the Dean’s Award for Faculty involvement. He completed his general cardiology fellowship at the Quebec Heart and Lung Institute in Quebec City, Canada, where he was named chief resident for two years and continued to teach residents and medical students on a daily basis. He led research projects regarding the safety of exclusive remote monitoring of ICD during the COVID-19 pandemic and regarding late recovery markers of patients with tachycardia-induced cardiomyopathy undergoing catheter ablation for atrial flutter. He received the Research Excellence Award from the Department of Medicine for this work. Apart from medicine, Dr. De Larochellière enjoys all kinds of outdoor activities, and sports, especially hockey and golf. He is very enthusiastic to pursue his training as a cardiac electrophysiology fellow at Stanford University!  

Ibrahim El Masri, MD

1st Year

Dr. Ibrahim El Masri is from Beirut, Lebanon. He received his undergraduate degree in Biology at the American University of Beirut and his Medical Degree from the University of Balamand. He came to the United States in 2016 where he completed his residency in Internal Medicine at the University at Buffalo. He then continued his medical career in the field of Cardiology at the University of Tennessee Health Science Center, where he served as Chief Cardiology Fellow.

One of his interests in Cardiac Electrophysiology was understanding the pathophysiology behind Atrial Fibrillation. His research training studied how the disease can be better managed based on a patient’s cultural background in hopes to create new ways for treating arrhythmias.

He is excited about his upcoming experience at Stanford and diving into the world of electrophysiology. With his training at Stanford and the advancements of the Tech Industry, he looks forward to the journey of seeing first hand of how the world of medicine and technology will intertwine to create newer devices in detecting and treating patients with arrhythmias.