Konstantinos N. Aronis, MD, PhD
FACC, FHRS, FESC, FEHRA
Board Certified Electrophysiologist • Johns Hopkins Faculty
Precision in Complex Heart Rhythm Care — Guided by Compassion. Driven by Innovation.
Assistant Professor of Medicine • Director, Complex ACHD Ablation Program • Associate Director, VT Ablation Program
Harvard & Johns Hopkins trained physician-scientist
MD, PhD — Summa Cum Laude
Board Certified: Cardiovascular Disease, Echocardiography, Electrophysiology
FACC · FHRS · FESC · FEHRA
80+ publications · 3,400+ citations · H-index 31
Director, Complex ACHD Ablation Program, Johns Hopkins
Associate Director, VT Ablation Program, Johns Hopkins
Associate Editor, JACC Case Reports
12+ professional societies with active leadership engagement
Consultant/KOL for 6 MedTech companies
10+ awards for research and academic excellence
14 institutions across US & Europe in active research collaborations
Trained 14 cardiac electrophysiologists
Guiding Patients Through the Most Complex Heart Rhythm Disorders
Some heart rhythm disorders don't have straightforward solutions. Patients arrive at my clinic after multiple ablations elsewhere, with ventricular tachycardia that threatens their lives, or with congenital heart anatomy that makes standard approaches impossible. These are the cases I've dedicated my career to solving.
As a board-certified cardiac electrophysiologist and Assistant Professor of Medicine at Johns Hopkins University, I direct the Adult Congenital Heart Disease Complex Ablation Program and co-direct the Ventricular Tachycardia Ablation Program. My work integrates advanced cardiac imaging, computational modeling, and techniques like hybrid surgical ablation and conduction system pacing in complex anatomy.
Technical capability matters—but so does communication. I spend considerable time ensuring patients and families understand their options, and I collaborate closely with referring physicians who entrust their most challenging cases to our team.
My contributions extend to research (80+ peer-reviewed publications, H-index 31), expert witness work in cardiac EP litigation, medical device consulting, and training the next generation of electrophysiologists at Hopkins and internationally.
Born and trained in Greece, I maintain teaching relationships in Athens while practicing in Baltimore—a transatlantic perspective that shapes how I approach both patient care and collaboration.
My training in Greece and ongoing academic collaborations there give me familiarity with how complex arrhythmias are managed across different healthcare systems—useful context when patients seek second opinions or consider treatment options abroad
Clinical Focus
“Every patient with arrhythmias, whether due to congenital or acquired structural heart disease, warrants a unique approach. I treat every case with a personalized strategy”
Ventricular Tachycardia & Ventricular Fibrillation
For patients with recurrent VT, or those who have not responded to initial therapies, I offer advanced ablation strategies including epicardial approaches, bipolar ablation, ethanol ablation, and hybrid surgical techniques. Each case begins with a comprehensive evaluation to identify the optimal approach—matching the right technique to each patient's unique substrate and needs.
Arrhythmias in Adult Congenital Heart Disease
Adults with congenital heart disease face unique arrhythmia challenges shaped by their anatomy and prior surgeries. I specialize in mapping and ablating arrhythmias in patients with complex anatomy, collaborating with ACHD cardiologists, cardiac surgeons, and imaging specialists to achieve the best outcomes.
Comprehensive Arrhythmia Care
Not every arrhythmia is rare or complex. I also care for patients with common conditions like atrial fibrillation, supraventricular tachycardia, I perform device implantation (including conduction system pacing), and device troubleshooting. Always bringing the same precision to straightforward cases.
How I Approach Complex Heart Rhythm Care
Precision
Every arrhythmia tells a story written in milliseconds. I integrate high-density mapping, detailed substrate analysis, and multimodality cardiac imaging to pinpoint the source of complex rhythms—even when standard approaches fall short. In the EP lab, precision isn't perfectionism—it's the margin between a successful ablation and a return visit.
Innovation
First-in-institution procedures aren't publicity—they're solutions for patients who've run out of options. At Hopkins, I've introduced hybrid VT ablation, on-pump ablation during LVAD implantation, and 3D-printed guidance for congenital device procedures—each developed because a patient needed something that didn't yet exist here. Innovation means adapting when textbook approaches don't work.
Compassion
Advanced care doesn't mean impersonal care. I take time to explain your condition clearly, answer every question, and ensure you're a true partner in treatment decisions. Arrhythmias are frightening—my role is to match technical expertise with the clarity and presence patients deserve.
Trusted by Patients and Colleagues
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