Atrial fibrillation and atrial flutter – the most common types of heart arrhythmia – impact around 52.55 million people worldwide. Both conditions result in abnormal heart rhythms, causing the heart to beat less effectively.
Essentially, the heart has four chambers. Two of them, the atria, are located at the top. The other two chambers, the ventricles, are located at the bottom.
When the heart is working as it should, the atria contract and push blood into the ventricles. This process is commonly known as a heartbeat. Atrial fibrillation and atrial flutter both can make the heart beat so quickly. However, they differ in nature.
In atrial fibrillation, the atria beat rapidly and irregularly, often out of sync with the ventricles. Atrial flutter also causes the atria to beat too quickly, but the rhythm is usually more regular. They beat faster, but still do not remain in sync with the ventricles.
To put it another way, because the atria beat so rapidly (often around 300 times per minute), the atrioventricular (AV) node acts as a gatekeeper. It physically cannot transmit every electrical impulse to the lower chambers, so it blocks some.
In both conditions, people have palpitations, feel short of breath, and experience chest tightness—to name just a few symptoms. The good news is that effective, safe, and quick treatments of these conditions exist.
Electrical Cardioversion
Cardioversion is the long-established treatment option for selected patients with atrial fibrillation or atrial flutter. It’s all about delivering controlled, low-energy shocks to the chest to restore normal rhythm using a machine and electrodes.
Usually, the heart responds immediately. However, in certain cases, it may take days or weeks. Recent studies have shown how effective the treatment is depends on optimal pre-procedural preparation.
Let’s understand it that way: the electrical shock must be synchronised with the heartbeat. Blood thinners must be used to prevent stroke. Further, modern equipment (capable of delivering biphasic shocks) with sufficient energy must be employed.
Improvements in modern cardioversion practice include biphasic shock delivery, anticoagulation protocols, and patient selection, which are highly significant.
Remember, the procedure works best when the arrhythmia is recent, the atria are not severely damaged, and the patient does not have severe chronic heart disease.
Pulsed Field Ablation
Pulsed field ablation uses nonthermal electrical impulses and is considered a suitable alternative to traditional thermal ablation, with comparable efficacy and potentially enhanced safety. The essential difference between electrical cardioversion and pulsed field ablation lies in their goals.
Pulsed field ablation is suitable for long-term rhythm control, as it targets the tissue that triggers the arrhythmia. Cardioversion, on the other hand, is used to restore normal rhythm immediately.
The Benefits of Pulsed Field Ablation
Pulsed field ablation differs from traditional ablation techniques, including radiofrequency and cryoablation, in that the latter use thermal (heat or cold) energy to destroy tissue, whereas pulsed field ablation uses electrical pulses.
Although thermal ablation is effective, the energy it emits can potentially damage the oesophagus and the nerves to the lungs and stomach.
It can also cause a dangerous narrowing of the pulmonary veins. Pulsed field ablation offers the benefits of thermal ablation while limiting the risk of injury to the organs surrounding the heart.
AI-Guided Mapping During Ablation
AI integration represents one of the most promising emerging advances in arrhythmia treatment. Machine learning algorithms are being investigated to help surgeons map atrial fibrillation more precisely and identify optimal ablation sites.
While tools showcased at events such as the Heart Rhythm Society annual meetings demonstrate potential to improve pulmonary vein isolation and procedural efficiency, AI-guided mapping remains an evolving area under clinical evaluation.
In the future, these technologies may help identify the specific tissue responsible for atrial fibrillation, enabling surgeons to target only the arrhythmogenic substrate while preserving surrounding structures.
Abbott’s Volt™ PFA System
Abbott’s Volt™ PFA System is a balloon-in-basket pulsed-field ablation catheter designed for pulmonary vein isolation in patients with atrial fibrillation. It delivers pulsed electric fields to isolate pulmonary veins while targeting tissue directly to avoid the blood pool, reducing the need for additional fluid.
– Clinical Trial Results
The 12-month data from the VOLT-AF Global IDE study demonstrated the following clinical endpoints:
- Paroxysmal AFib: 84.2% of patients achieved freedom from documented rhythm recurrence.
- Persistent AFib: Nearly 68% of patients with AFib lasting more than 7 days remained free of additional episodes.
Detailed presentations on this trial’s results are available via the Abbott Media Center, and comprehensive evidence can be reviewed on the Abbott Clinical Evidence Portal.
– Procedural & Safety Profile
Real-world and clinical evidence support the system’s efficiency and safety:
- Anaesthesia: Data indicate the catheter can be used without general anaesthesia, with a high proportion of procedures completed under deep or conscious sedation.
- Workflow: Integration with three-dimensional mapping systems allows the device to be used for both mapping and ablation, streamlining procedural steps.
- Safety Outcomes: Pre-market evaluations reported acute procedural effectiveness with a low incidence of primary serious adverse events or complications, including phrenic nerve injury and pulmonary vein stenosis.
Conclusion
As stated above, atrial fibrillation and atrial flutter are the two most common arrhythmias. These conditions reduce quality of life, causing symptoms ranging from dizziness to fainting. Treatment may involve electrical cardioversion, pulsed-field ablation, anticoagulation, rate control, rhythm control, and, in selected cases, advanced mapping technologies.
Disclaimer
This article is intended for informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment recommendations. The content reflects publicly available clinical information, emerging research, and industry developments at the time of publication. Readers should not rely on this material as a substitute for professional medical consultation with a qualified healthcare provider or cardiology specialist.
References to specific technologies, devices, companies, clinical studies, or treatment approaches, including pulsed field ablation systems and AI-assisted mapping tools, are provided for general awareness and do not represent endorsement by Open MedScience. Treatment decisions should always be based on individual clinical assessment, regulatory approvals, and current medical guidelines.
Patients experiencing symptoms of atrial fibrillation, atrial flutter, or other cardiac conditions should seek immediate advice from an appropriately qualified medical professional.
home » blog » human anatomy »
