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.
Limited benefit of half-normal vs normal saline irrigation for augmenting current delivery with open-irrigated temperature-controlled ablation.
Limited benefit of half-normal vs normal saline irrigation for augmenting current delivery with open-irrigated temperature-controlled ablation. Heart Rhythm O2. 2026 Aug; 7(8):1555-1563.
PMID: 42666866
Subcutaneous implantable cardioverter-defibrillator system malfunction during pelvic radiation therapy: Recognition and management of a rare complication.
Subcutaneous implantable cardioverter-defibrillator system malfunction during pelvic radiation therapy: Recognition and management of a rare complication. HeartRhythm Case Rep. 2026 Jul; 12(7):749-751.
PMID: 42472196
Sex-specific impact of body mass index on recurrence of atrial fibrillation after catheter ablation.
Sex-specific impact of body mass index on recurrence of atrial fibrillation after catheter ablation. Heart Rhythm O2. 2026 Apr; 7(4):675-685.
PMID: 42038675
Multicenter Study on the Safety of Pulsed Field Ablation in Over 40,000 Patients: MANIFEST-US.
Multicenter Study on the Safety of Pulsed Field Ablation in Over 40,000 Patients: MANIFEST-US. J Am Coll Cardiol. 2026 Jan 20; 87(2):172-193.
PMID: 41389071
Approach to Atrial Pacing in an Extracardiac Fontan Patient: Avoiding Trans-Baffle Puncture Through Electroanatomical Mapping.
Approach to Atrial Pacing in an Extracardiac Fontan Patient: Avoiding Trans-Baffle Puncture Through Electroanatomical Mapping. JACC Clin Electrophysiol. 2025 Dec; 11(12):2819-2823.
PMID: 41071159
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