Interventional Cardiology
Dr. AlexanderHarrington
Pioneering minimally invasive cardiac procedures with a patient‑first philosophy. Every heart tells a story — my role is to ensure it keeps beating strong.
My Philosophy
"Medicine is not merely a science but an art. The rapport between physician and patient remains the most neglected asset in healthcare — I refuse to let that be the case."
With over fifteen years at the forefront of interventional cardiology, I have dedicated my career to transforming complex cardiac conditions into manageable, life-affirming outcomes. My approach merges cutting-edge catheter-based techniques with an unwavering commitment to understanding each patient as a whole person.
From high-risk coronary interventions to structural heart disease, I believe that transparent communication and shared decision-making are as vital as the procedure itself. Every consultation is a partnership.
Clinical Expertise
Specialized Cardiac Care
Advanced, evidence-based interventions tailored to each patient's unique cardiovascular needs.
Coronary Interventions
Complex PCI, chronic total occlusion revascularization, and rotational atherectomy for calcified lesions — restoring optimal blood flow with precision and minimal downtime.
Structural Heart
TAVR, MitraClip, and left atrial appendage closure for patients who need valve and structural repairs without open-heart surgery.
Electrophysiology
Catheter ablation for atrial fibrillation, SVT, and ventricular tachycardia — rhythm restoration with cutting-edge mapping.
Preventive Cardiology
Comprehensive risk stratification, lipid management, and coronary calcium scoring to detect disease before it manifests.
Genetic Testing
Hereditary cardiomyopathy screening and pharmacogenomics to personalize treatment plans at the molecular level.
Critical & Acute Care
Hemodynamic support with Impella and ECMO, acute STEMI intervention, and cardiogenic shock management — every second matters, and my team is prepared around the clock.
Career & Education
A Lifetime of Dedication
Trained at the world's most prestigious institutions, guided by a relentless pursuit of clinical excellence.
2021 — Present
Director of Interventional Cardiology
Mount Sinai Heart, New York, NY
Leading a multidisciplinary team of 30+ specialists performing over 1,200 complex coronary and structural interventions annually.
2015 — 2021
Attending Interventional Cardiologist
Cleveland Clinic, Cleveland, OH
Performed high-risk PCI and TAVR procedures as part of the nation's No. 1 ranked heart program for six consecutive years.
2013 — 2015
Interventional Cardiology Fellowship
Massachusetts General Hospital / Harvard Medical School
Advanced training in complex coronary and peripheral interventions under world-renowned pioneers in the field.
2010 — 2013
Cardiovascular Medicine Fellowship
Johns Hopkins Hospital, Baltimore, MD
Comprehensive fellowship covering non-invasive imaging, heart failure, and clinical research with three published papers in JACC.
2007 — 2010
Internal Medicine Residency
NewYork-Presbyterian / Columbia University
Chief Resident in final year; recognized for clinical teaching excellence and patient safety initiatives.
2003 — 2007
Doctor of Medicine (M.D.)
Yale School of Medicine, New Haven, CT
Graduated with honors, inducted into the Alpha Omega Alpha Honor Medical Society.
Get in Touch
Schedule Your
Consultation
Whether you need a second opinion, a complex intervention, or a comprehensive cardiac assessment — my team is here for you.
Clinic Location
Mount Sinai Heart — Guggenheim Pavilion
1190 Fifth Avenue, New York, NY 10029
Direct Line
+1 (212) 241‑7911
consultations@drharrington.com
Office Hours
Mon – Fri: 8:00 AM – 5:00 PM
Sat: By Appointment Only