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Mercy Heart Rhythm Center

Every beat counts

The Mercy Heart Rhythm Center provides advanced heart rhythm services to patients with all types of heart rhythm disorders, or arrhythmias.

The Heart Rhythm Center is dedicated to:

  • fostering excellence in the diagnosis, treatment and prevention of arrhythmias
  • raising public awareness about sudden cardiac arrest (SCA)
    promoting coordinated, compassionate, patient-centered care
  • reducing deaths and disability due to heart rhythm disorders

Mercy Heart Rhythm Team

The electrophysiologists – or cardiologists with advanced education and training in the diagnosis and treatment of abnormal heart rhythms – at the Mercy Heart Rhythm Center are internationally-recognized for their work in the field of electrophysiology. Procedures are performed at Mercy central campus and Mercy West Lakes.

In collaboration with Mercy and Iowa Heart Center surgeons and cardiologists, they serve as a referral source for patients and physicians in central Iowa.

Heart Rhythm Specialists:
  • Dwayne Campbell, M.D,
  • Troy Hounshell, D.O.,
  • Robert H. Hoyt, M.D.
  • Pitayadet Jumrussirikul, M.D.
  • Jason Meyers, M.D.
  • Denise M. Sorrentino, M.D.
  • Craig J. Hoffman, PA-C
  • Ryan Hoffman, PA-C

Diagnosing Heart Disorders

The heart’s electrical system is very complex, so diagnosing rhythm disorders requires special equipment and skills. Most often, a diagnosis is made non-invasively, such as with a holter monitor, event monitor or stress test.

An electrophysiology study (EP) may also be recommended for a more thorough assessment. This diagnostic catheter procedure helps to find the causes of a particular rhythm disorder and determine the best method of treatment.

Rhythm Disorder Treatments

Treatment at the Heart Rhythm Center is highly individualized based on severity and symptoms. Treatment can range from reassurance to drug therapy, to one of the procedures or devices listed below.


Heart Rhythm Disorders/Arrhythmias

Abnormal heart rhythms, called arrhythmias, are disturbances in the regular rhythm of the heart. Rhythms can become too fast, too slow or irregular. Problems with the heart rhythm, or electrical functioning of the heart, can produce symptoms of palpitations (pounding in the chest), fatigue, dizziness, fainting, chest pain or shortness of breath. While some arrhythmias are considered harmless, others can be life-threatening and lead to cardiac arrest if they are not diagnosed and treated.

Common arrhythmias

  • Tachycardia is a fast heart rate of more than 100 beats per minute.
  • Bradycardia is a heart rate that is too slow; generally less than 40 to 50 beats per minute. Bradycardia is often corrected by implanting a pacemaker.
  • Atrial fibrillation (AF) is the most common heart rhythm condition. AF causes the upper chambers of the heart (atria) to beat fast and irregular, triggering the atria to quiver.
  • Ventricular fibrillation is a life-threatening condition in which the heart’s lower chambers (ventricles) quiver, preventing the heart from pumping blood to the body.
  • Heart block is an impairment of the transmission of electrical signals from the heart’s upper chambers to its lower chambers.
  • Heart rhythm disorder treatment options
(515) 247-3121
1111 6th Avenue
Des Moines, Iowa 50314

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