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Arrhythmia Clinic

South Denver Cardiology Arrhythmia Clinic

This is a physician-supervised, nurse practitioner-led clinic that has been inspired by other similarly structured programs around the globe which have been shown to be more successful than traditional models of care in controlling arrhythmias and symptoms, preventing hospitalization, decreasing cost, preventing stroke, and effectively treating other contributing health problems.  Our collective goal is to provide you rapid access to the best treatment options to control your heart rhythm, and to improve your overall health and wellbeing.  We pride ourselves in delivering research-supported, cutting-edge treatment customized to your individual needs. 

Our Mission: We will be the destination arrhythmia care center for the region and a national model for quality, patient experience, and innovation.   

Our Vision: We aim to implement patient-centered, quality care for treating arrhythmias with early intervention and streamlined access to aggressive risk factor management.   

To contact the Arrhythmia Clinic, 
If you have symptoms, we will ensure you have a clinic appointment scheduled within 72 hours. We are dedicated to your well-being and readily accessible to assist you.
Arrhythmia Clinic Voice mail: 303-738-3080.  Messages are checked every few hours during business hours (Monday-Friday 7:00-5:00).  Staff will return your call within 1-2 business days.  Please do not leave urgent messages.

The arrhythmia clinic is located at the Porter satellite office in the Porter Medical Plaza Building at 2535 S. Downing St. #460, Denver, CO 80210. Get Directions: 

Our Patient Portal is one of our main avenues for communicating with you.  You can ask our nursing staff questions, request appointments, record and track your personal history, pay your bill and renew your prescriptions online. Click here to visit the Patient Portal.

The Arrhythmia Clinic Team: Who are we? At our clinic we take a comprehensive and multidisciplinary approach to managing arrhythmias.  Under the leadership of Dr. Dan Alyesh, our team includes nurse practitioners, cardiac RNs, LPNs, medical assistants, and schedulers who work collaboratively to implement a patient-centered, integrated, multifaceted care plan.   

Your initial visit will include a comprehensive cardiac evaluation and consultation with an experienced nurse practitioner who will then recommend the best-suited cardiologist for you to meet with after any outstanding cardiac testing is completed.  The rest of your comprehensive arrhythmia management plan will be facilitated by our dedicated Arrhythmia Clinic team.  Your visits will be conducted by a nurse in collaboration with a nurse practitioner.  All clinic visits will be reviewed and overseen by an electrophysiologist; a cardiologist specialized in the heart’s electrical system.  Once your heart rhythm is effectively managed, you will be transitioned out of Arrhythmia Clinic and into the care of the cardiologist that will see you routinely thereafter. 

Meet the Arrhythmia Clinic Team


Electrophysiologist Daniel Alyesh MD Daniel Alyesh, M.D.

William Choe, M.D.

Ryan Jordan - South Denver Cardiology Ryan Jordan, M.D.

Sri Sundaram, M.D.

Nicholas Palmeri, MD


Nurse Practitioners

Nurse Practitioners / Nurses

Elizabeth Grossnickle

Nurse Practitioners,
Barbara Poole

Nurse Practitioners,
Joellen Spicer

Nurse Practitioners,
Allison Percevich

Nurse Practitioners,

Diagnosing Your Arrhythmia

There are many different tools we use to diagnose heart rhythm problems. Click on the tools below to learn more:

Ambulatory Rhythm Monitoring (Event monitors, Holter monitors, Loop Records)

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ECG (also known as EKG) A non-invasive test that records the heart's electrical activity.


Electrophysiology (EP) study

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Wearable Devices (from the Heart Rhythm Society)

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What is Atrial Fibrillation? (AFib)

South Denver Cardiology is home to six cardiac electrophysiologists (EP) who specialize in preventing and treating abnormal heart rhythms. Sri Sundaram, MD, is one of the EP doctors who specializes in AFib and shares some facts on what AFib is and how it is treated.

Arrhythmias We Treat

Electrophysiology Procedures offered at South Denver Cardiology

Associated Health Problems

There are certain conditions that can affect treatment for your rhythm disorder

Heart Failure

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Sleep Apnea


Obesity and Inactivity

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Lifestyle Habits


Schedule an appointment

If you think you have a cardiac arrhythmia or want to learn how the South Denver Cardiology Arrhythmia Clinic can help you, please call 303-738-3080  or contact us online to request an appointment.