No abstract available.
Catheter Ablation ; Catheters

No abstract available.
Atrial Fibrillation* ; Catheter Ablation*

No abstract available.
Catheter Ablation* ; Catheters*

PURPOSE: To determine the differences between sequential ablation with a single probe and simultaneous ablation with dual probes. MATERIALS AND METHODS : Using two 14-gauge expandable probes (nine internal prongs with 4-cm deployment), radiofrequency was applied sequentially (n=8) or simultaneously (n=8) to ten ex-vivo cow livers. Before starting ablation, two RF probes with an inter-probe space of 2 cm (n=8) or 3 cm (n=8) were inserted. In the sequential group, switching the connecting cable to an RF generator permitted ablation with the second probe just after ablation with the first probe had finished. In the simultaneous group, single ablation was performed only after connecting the shafts of both RF probes using a connection device. Each ablation lasted 7 minutes at a target temperature of 105-110 degrees C. The size and shape of the ablated area, and total ablation time were then compared between the two groups. RESULTS: With 2-cm spacing, the group, mean length and overlapping width of ablated lesions were, respectively, 5.20 and 5.05 cm in the sequential group (n=4), and 5.81 and 5.65 cm in the simultaneous group (n=4). With 3-cm spacing, the corresponding figures were 4.99 and 5.60 cm in the sequential group (n=4), and 6.04 and 6.78 cm in the simultaneous group (n=4). With 2-cm spacing, the mean depth of the proximal waist was 0.58 cm in the sequential (group and 0.28 cm in the simultaneous group, while with 3-cm spacing, the corresponding figures were 1.65 and 1.48 cm. In neither group was there a distal waist. Mean total ablation time was 23.4 minutes in the sequential group and 14 minutes in the simultaneous group. CONCLUSION: In terms of ablation size and ablation time, simultaneous radiofrequency ablation with dual probes is superior to sequential ablation with a single probe. A simultaneous approach will enable an operator to overcome difficulty in probe repositioning during overlapping ablations, resulting in complete ablation with a successful safety margin.
Catheter Ablation ; Liver

No abstract available.
Catheter Ablation ; Thyroid Gland*

Radiofrequency (RF) ablation of painful bone tumours and metastasis has quickly progressed from an experimental procedure to an established minimally invasive method for pain control. This review will describe the physics behind RF ablation technology. Osteoid osteomas were the first primary bone tumours to be treated in this manner, establishing RF ablation as the treatment modality of choice. A more recent development involves the use of RF ablation in painful bone metastases. In this setting, RF ablation complements radiation therapy. Its advantage lies in a more rapid onset of pain reduction (often at least by 2 points on a 10-point scale), and that radiation therapy can be employed concomittantly. It is important to remember that the aim of RF ablation in painful bone metastases is not curative, but palliation.
Catheter Ablation - Methods

Atrial tachycardia (AT) originating from the aortomitral junction is a very rare and challenging disease. Its arrhythmic characteristics have not been described in detail compared with the descriptions of the arrhythmic characteristics of AT originating from the other locations. Only a few case reports have documented successful ablation of this type of AT using transaortic or transseptal approaches. We describe a case with AT that was resistant to right-sided ablation near the His bundle failed and transaortic ablation at the aortomitral junction successfully eliminated.
Bundle of His ; Catheter Ablation ; Tachycardia*

Radiofrequency ablation (RFA) takes an important role in management of hepatocellular carcinoma (HCC) as the most popular local therapy in the world. There are many data supporting that RFA is an excellent treatment modality for early-stage HCC with favorable treatment outcomes and minimal invasiveness. Currently, RFA extends treatement indications from unresectable early-stage HCC to intermediate-stage HCC in selected cases. Thus, with technical advances in guidance and ablation as well as devices, RFA widens its territory in the combat field against HCC.
Carcinoma, Hepatocellular* ; Catheter Ablation* ; Ultrasonography

No abstract available.
Carcinoma, Hepatocellular ; Catheter Ablation* ; Liver*

No abstract available.
Catheter Ablation* ; Thyroid Gland* ; Ultrasonography