Cardioversion Versus Catheter Ablation

June 22, 2022

If you suffer from an arrhythmia like Afib and specifically a fast heartbeat known as tachycardia, you may have seen information on two very different ways to get the heart back into sinus or normal rhythm. First, we’d like to give you an overview of each procedure; then, we will discuss when these procedures can be used to maximize effectiveness.


Cardioversion involves shocking the heart back into its normal rhythm. It’s a straightforward procedure that EMTs can perform during an emergency but is more often scheduled with your electrophysiologist. Pads are placed on the chest, and an electric shock is delivered to the heart to reset its electrical signals.

 While electrical cardioversion uses shocks to bring the heart back into normal rhythm, there are also medications that, in theory, can do the same thing. While some patients may benefit from chemical cardioversion (thus avoiding sedation and electric shock), electrical cardioversion is typically much more successful.

How Does Cardioversion Differ from Defibrillation?

While the principle of shocking the heart is the same, cardioversion delivers a milder shock. Defibrillation is always used during emergencies where the patient is at significant risk for sudden cardiac death. Cardioversion is used to shock the heart out of an arrhythmia.

Cardiac Catheter Ablation

On the other hand, cardiac catheter ablation is a much more involved procedure that requires anywhere from 2 to 4 hours. During this procedure, a catheter is threaded up a vein in the groin to the heart. The heat generated by RF waves or cold generated by cryo-ablation is delivered to the specific areas of the heart, neutralizing the heart tissue causing the arrhythmia.

When Would Either Be Used?

Cardioversion may be used as a first step intervention to shock the heart back into normal rhythm. This is typically performed early in the continuum of patient care with the hope that an arrhythmia is a one-off event. However, if the patient begins to experience more frequent arrhythmia episodes or if it is clear that the arrhythmia is here to stay, cardiac catheter ablation is often a more suitable option. Why? If there is an underlying cause of the arrhythmia, cardioversions do not address it. It simply brings the heart back to normal. On the other hand, cardiac catheter ablation targets the errant electrical signals of the heart by destroying the tissue that creates them. While an ablation is more involved, it can significantly reduce the likelihood of future Afib or other arrhythmia episodes.

Most importantly, if you are experiencing occasional or persistent atrial fibrillation, it is important to visit an electrophysiologist like Dr. Banker to understand the next steps in the treatment process. For some, lifestyle changes and medication may be sufficient to control arrhythmia. For others, however, cardiac catheter ablation may be a good option for controlling the arrhythmic events and reducing dependence on medication.

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Electrophysiologist Dr. Rajesh Banker performs minimally invasive arrhythmia treatment in Southern California

Dr. Banker is the principal investigator or PI of a groundbreaking first-ever study of a dual-chamber leadless pacemaker. If this device is ultimately FDA approved, it would be the world’s first and significant step forward in pacemaker technology and miniaturization. To understand how significant this is, it’s essential to discuss existing pacemaker technology and its limitations.

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Looking To Turn Back Your Heart’s Biological Clock? Take a Walk.

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Vigorous walking can improve heart health according to cardiology research

Fascinating new research shows the benefits of walking-related to our biological age. Most of us may have commented on how we feel so much younger or older than we were at one time or another. This phenomenon and feeling arise due to the often-underappreciated differences between biological and chronological age.

For most of us, feeling young or old is very subjective. They may revolve around stressful or happy times in our lives. They are strongly influenced by how we think of ourselves emotionally and the aches or pains we may be experiencing. However, it’s essential to realize that we may also “feel younger” on a cellular level. Research is starting to show possible connections between one’s biological age and telomere length as an objective measurement within the body.

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Does AI Have a Place in Catheter Ablation Success?

April 28, 2022

Medical equipment in cardiac procedure room where new technology is used including artificial intelligence in cardiology

If you’ve ever seen an EP lab, you will notice that it is one of the most advanced operating theaters of any medical specialty – humming with technology. And there is a good reason for this. Accurately mapping the structures and electrical signals of the heart requires incredibly advanced and robust technology. Not only must we ensure precise treatment of the areas of the heart producing the errant electrical signals, but we must also verify that our treatment has indeed worked. While one distinct benefit of cardiac catheter ablations that it can be performed more than once, we want to minimize the number of procedures performed, for the sake of our patients’ comfort and convenience.

Cardiac catheter ablations, like any treatment, are not 100% effective for all patients. A minority of patients may not experience the full benefit of the ablation or may have to return for a second procedure. Advanced artificial intelligence technology has begun to address this issue by using computing power to monitor the electrical firings of the heart in real-time, during the ablation, and processing the data on the spot. Using algorithms based on our knowledge of cardiac arrhythmias, these computer programs can often help the electrophysiologist pinpoint areas of concern that would otherwise not have been apparent.

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Study Confirms Alcohol Consumption as a Risk Factor for Afib

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Man drinking a beer considers if alcohol consumption could contribute to or impact his atrial fibrillation

We have long known that lifestyle choices play a big part in the risk factors associated with atrial fibrillation or Afib. There are other components to the risk of developing heart arrhythmias, but a number of these are modifiable – meaning we can change them.

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Electrophysiologist Dr. Rajesh Bankers stands over patient in the EP Lab during a electrophysiology study in New Port Beach, CA

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An EP study is where a minimally invasive catheter is threaded through a small incision in the groin and up to the heart via the femoral vein. However, you may be wondering when and how we get to the need for an electrophysiology study.

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Does Having an Atrial Fibrillation Ablation Mean I Will Be Off My Meds?

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Medication may become less effective for treating arrhythmia but does ablation make medication unnecessary

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The Difference Between RF and Cryo-Ablation

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If you have been diagnosed with atrial fibrillation / Afib or any other tachycardia, you may have been told that cardiac catheter ablation may be the appropriate option for you. During your research, you may have found two strikingly similar ablation options to choose from. Dr. Banker performs both procedures – RF ablations using heat and cryoablations using cold to achieve the same goal of eliminating errant electrical heart signals.

Electrophysiologist prepares for a cardiac ablation procedure using either RF or Cryo-Ablation to treat arrhythmia

Before we get into the similarities and differences of these two procedures, it is important to understand why you have been referred to Dr. Banker for an ablation. Even if your arrhythmia is relatively mild and doesn’t cause significant lifestyle issues, you are at a much greater risk of a stroke, heart attack, and long-term heart failure. Arrhythmias, especially Afib, the most common type, may increase the likelihood of blood pooling and clotting in the heart. If a clot breaks off and travels to the brain, it can cause a stroke. Cardiac catheter ablation is an excellent, effective, and safe minimally invasive procedure to identify the problematic electrical signals and destroy the heart tissue causing them. All of this, without the need for open-heart surgery, significant downtime, or large incisions.

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The Relationship Between High Blood Pressure and Afib

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Significant research has been performed on the potential causes of Atrial Fibrillation or AFib. Lifestyle choices, including a lack of exercise and poor diet, most certainly contribute to the incidence and severity of Afib. It is also important to note that one of the most significant consequences of this poor lifestyle is high blood pressure or hypertension. As the arteries narrow due to plaque buildup known as atherosclerosis, the heart must pump ever harder to get the same amount of blood through the body. While the heart is a formidable muscle, even the strongest of muscles can begin to weaken when overworked. As such, high blood pressure can begin to cause various arrhythmias or irregular heartbeats, including Afib.

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