Andrew D. Beaser, MD is a cardiac electrophysiologist specializing in the diagnosis and treatment of complex heart rhythm disorders. He is highly skilled in catheter ablation of arrhythmias—including atrial fibrillation (AF), supraventricular tachycardia (SVT), and ventricular tachycardia (VT)—using both radiofrequency (RF) and pulsed field ablation (PFA) technologies. Dr. Beaser also has extensive expertise in device-based therapies, performing pacemaker and defibrillator implantations, including transvenous and subcutaneous ICDs, as well as leadless pacemakers. His work in lead management has made him a leader in complex laser lead extraction procedures.
In addition to his clinical practice, Dr. Beaser conducts research closely aligned with his subspecialty interests. He aims to advance the safety and effectiveness of lead extraction and to explore innovative applications of radiofrequency ablation for non-arrhythmic cardiac conditions. He is also investigating the effects of GLP-1–based weight-loss therapies on the burden of atrial fibrillation.
Dr. Beaser plays an active role in multidisciplinary care through his involvement with a dedicated Hypertrophic Cardiomyopathy Center. He provides consultative cardiovascular care to the Chicago Sky WNBA team and several collegiate athletic programs. A committed educator, he is passionate about teaching trainees the principles of cardiac electrophysiology and ECG interpretation.
Age-Adjusted Echocardiographic Parameters for Differentiating Cardiac Amyloidosis and Hypertrophic Cardiomyopathy.
Age-Adjusted Echocardiographic Parameters for Differentiating Cardiac Amyloidosis and Hypertrophic Cardiomyopathy. J Am Soc Echocardiogr. 2025 Dec; 38(12):1236-1238.
PMID: 40885215
Left Septal Recordings in HBP Versus LBBAP: Highlighting the Need for a Modified Nomenclature.
Left Septal Recordings in HBP Versus LBBAP: Highlighting the Need for a Modified Nomenclature. JACC Clin Electrophysiol. 2025 Jun; 11(6):1388-1392.
PMID: 40272317
Left Ventricular Entry to Reduce Brain Lesions During Catheter Ablation: A Randomized Trial.
Left Ventricular Entry to Reduce Brain Lesions During Catheter Ablation: A Randomized Trial. Circulation. 2025 Apr 15; 151(15):1051-1059.
PMID: 39989365
Electrophysiological predictors of susceptible atrial substrate for the onset and recurrence of atrial fibrillation.
Electrophysiological predictors of susceptible atrial substrate for the onset and recurrence of atrial fibrillation. J Interv Card Electrophysiol. 2025 Apr; 68(3):635-642.
PMID: 39612095
Clinical outcomes of conduction system pacing compared to biventricular pacing in patients with mid-range ejection fraction.
Clinical outcomes of conduction system pacing compared to biventricular pacing in patients with mid-range ejection fraction. J Interv Card Electrophysiol. 2025 Jan; 68(1):111-116.
PMID: 39153133
Comparing outcomes after pulmonary vein isolation in patients with systolic and diastolic heart failure.
Comparing outcomes after pulmonary vein isolation in patients with systolic and diastolic heart failure. Heart Rhythm O2. 2024 Aug; 5(8):529-537.
PMID: 39263616
A Revised Definition of Left Bundle Branch Block Using Time to Notch in Lead I.
A Revised Definition of Left Bundle Branch Block Using Time to Notch in Lead I. JAMA Cardiol. 2024 May 01; 9(5):449-456.
PMID: 38536171
In Situ Myocardial Regeneration With Tissue Engineered Cardiac Patch Using Spheroid-Based 3-Dimensional Tissue.
In Situ Myocardial Regeneration With Tissue Engineered Cardiac Patch Using Spheroid-Based 3-Dimensional Tissue. Ann Thorac Surg Short Rep. 2024 Mar; 2(1):150-155.
PMID: 38464466
Vasovagal Responses to Human Monomorphic Ventricular Tachycardia: Hemodynamic Implications From Sinus Rate Analysis.
Vasovagal Responses to Human Monomorphic Ventricular Tachycardia: Hemodynamic Implications From Sinus Rate Analysis. J Am Coll Cardiol. 2023 09 12; 82(11):1096-1105.
PMID: 37673510
Identification of Human Ventricular Tachycardia Demarcated by Fixed Lines of Conduction Block in a 3-Dimensional Hyperboloid Circuit.
Identification of Human Ventricular Tachycardia Demarcated by Fixed Lines of Conduction Block in a 3-Dimensional Hyperboloid Circuit. Circulation. 2023 10 31; 148(18):1354-1367.
PMID: 37638389