Procedure · Houston
Catheter Ablation for Heart Arrhythmias
Ablation finds the circuit keeping an abnormal rhythm alive and treats the small amount of tissue that sustains it. The mapping is the hard part.
What ablation actually does
Every sustained arrhythmia needs tissue that conducts in a way it should not — a ring of scar, an extra pathway, a sleeve of muscle reaching into a pulmonary vein. Catheters passed through a vein in the groin record the electrical signal from inside the heart and build a map of where that circuit lives. Energy is then delivered to the tissue holding it together.
What ends the rhythm is the accuracy of the map. The energy is the easy part.
Which rhythms it treats
- Atrial fibrillation — isolating the pulmonary veins is the foundation of the procedure.
- Typical atrial flutter — a predictable circuit with a well-defined target. One of the higher-yield ablations in electrophysiology.
- SVT — AV-nodal reentry, accessory pathways, atrial tachycardia. For many people this is a one-time procedure rather than a lifetime of medication.
- Ventricular tachycardia — selected cases, usually alongside treatment of the underlying heart-muscle problem rather than instead of it.
- PVCs — when the burden is high enough to weaken the ventricle over time.
Choosing the energy
Pulsed field ablation uses short high-voltage pulses that act preferentially on heart muscle. It is used when pulmonary-vein isolation is the job and the anatomy fits. Other circuits may need a different energy or no ablation. That decision is made on the map, not as a default.
The choice follows the circuit and what sits next to it — the esophagus, the phrenic nerve, the conduction system — not a preference for one console. A practice that only offers one energy will find a reason to use it.
What the day looks like
The case is done in a hospital EP lab under sedation or general anesthesia, depending on the rhythm and the plan. Catheters enter through the femoral vein. A flutter or SVT case is typically shorter than an AFib case. Most patients go home the same day or the following morning.
You will get specific activity and groin-site instructions at discharge. Follow those rather than a general article.
The first three months
The groin heals quickly. The atrium does not. The first three months after an AFib ablation are a blanking period: early recurrences are common, expected, and not by themselves a failed procedure. Inflammation and healing tissue are temporarily irritable.
Judging the result before that window closes is how people end up discouraged over something that was going to settle.
Risks, stated plainly
Bruising or bleeding at the access site. Fluid collecting around the heart. Stroke. Injury to a structure sitting near the heart. Damage to the conduction system that requires a pacemaker. These are uncommon, but they are real, and the profile differs by which ablation and which energy.
Ask what the risks are for your procedure and your anatomy. A number quoted for the average patient is not an answer about you.
When ablation is not the answer
If the rhythm has never actually been captured, the first step is a monitor, not a lab. If symptoms are driven by untreated sleep apnea, thyroid disease, alcohol, or blood pressure, ablating into that produces a short-lived result. And if the rhythm is controlled on a medication you tolerate well, leaving it alone is a legitimate plan, not a failure of nerve.
Where the case is done, and who follows you
Procedures are performed at Houston Methodist, Memorial Hermann, Baylor St. Luke’s, and HCA hospitals across the Texas Medical Center, Clear Lake, and Pearland corridors. Clinic follow-up is at TMC, Clear Lake, or Pearland, Monday–Friday, 8am–5pm. One number: (832) 972-7300.
Dr. Boone evaluates you, performs the procedure, and keeps the follow-up. There is no hand-off to a different physician for the part that matters.
Questions
Will I be awake?
It depends on the case. Some ablations are done under sedation, others under general anesthesia. That is decided before the day, and you will know which one you are having.
Does ablation cure atrial fibrillation?
It can substantially reduce or eliminate the burden for many people, particularly in paroxysmal AFib. It is not a guarantee, and long-standing persistent disease is harder. Anyone promising a cure before seeing your tracing and your atrium is selling something.
Can I stop anticoagulation afterwards?
Not on the strength of the ablation alone. Stroke risk follows the patient, not the energy used in the lab. That decision is made on your risk profile, separately.
What if the first ablation does not hold?
Repeat procedures are a normal part of AFib care, not an admission that something went wrong. Veins can reconnect, or a second circuit can declare itself once the first is quiet.
How soon can I get in?
Usually the same week. No referral is required. If another physician is sending records, fax (855) 538-7649.
Related: Atrial fibrillation · Pulsed field ablation · All arrhythmias · Treatments
Bring the tracing. We will tell you if ablation belongs on the table.
Not a brochure. A named rhythm, and an honest answer about whether a catheter helps it.