Patient experience of very high power short duration radiofrequency ablation for atrial fibrillation under mild conscious sedation
Gavin S. ChuPeter CalvertBharat SidhuAkash MavilakandyAhmed KotbLilith TovmassianNikola KozhuharovCédric BierméNathan DenhamCharlene PiusJim O’BrienWern Yew DingVishal LutherRichard SnowdonG. André NgDhiraj Gupta
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Tolerability
Implantable loop recorder
Implantable loop recorder
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Pulmonary vein isolation (PVI), a cornerstone for catheter ablation of atrial fibrillation (AF), remains a complex and time-consuming procedure. Present study introduces a novel, circular-irrigated, deca-channel mapping and ablation catheter (CIDMA), describes the in vitro test results on feasibility, safety, and acute efficacy of the CIDMA catheter. An assembled CIDMA catheter was subjected to a number of in vitro tests. With this catheter, ablation procedures were first performed in a pig’s myocardial strips in vitro to determine the effects in unipolar or bipolar configuration. Three catheters were assembled. The adjustable circular diameter was changed from initial state of 32.41 ± 0.61 mm into controlled state of 28.61 ± 0.47 mm (P = 0.013). In the plastic model, the push-ability, torque-ability, and kink resistance of CIDMA catheter were shown to be satisfactory. In vitro, our findings showed that ablation could produce obvious ablation lesions, and unipolar ablation (at length, width and depth of 5.0 ± 1.3, 4.6 ± 0.7, and 4.2 ± 0.6 mm, respectively) was more effective than bipolar (at length, width and depth of 2.8 ± 0.2, 4.2 ± 0.5, and 2.3 ± 0.4 mm, respectively) (P < 0.01). In vitro, our preliminary data suggest that the CIDMA catheter produced optimal ablation lesions, especially in the unipolar ablation mode. Future in vivo animal and clinical studies are warranted to test the efficacy of this catheter in real-world scenario.
Angiology
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This study aimed to determine the success rate of sedation-free upper gastrointestinal (GI) endoscopy and evaluate the cost-effectiveness of this drug-free approach.The study included patients who underwent gastroscopy between February 2020 and December 2022. Demographic information such as age and gender, along with clinical data including whether the procedure was performed with sedation and the patients' tolerance status, were recorded. Statistical analysis revealed no significant difference between the sedation and sedation-free groups in terms of procedural success. Interestingly, a notable cost difference of 43% was observed between the two groups, with the sedation-free group demonstrating higher cost-effectiveness. Despite the nearly 50% higher cost associated with administering sedation, there was no significant disparity in the successful completion of the procedure between the two groups. The findings of this study indicate that sedation-free upper GI endoscopy can achieve comparable success rates to the sedation-assisted approach. Moreover, the cost-effectiveness analysis highlights the economic advantage of the drug-free alternative, given the substantial cost reduction observed in the sedation-free group. This study underscores the feasibility of implementing sedation-free procedures as a cost-effective and successful option for upper GI endoscopy
Upper gastrointestinal endoscopy
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A retrospective analysis was performed to define the impact of age on the outcomes and complications in patients undergoing pulmonary vein isolation (PVI). PVI is an evolving technique for the management of atrial fibrillation (AF). The impact of age on the risks, outcomes, and complications of PVI has not been well defined.A total of 323 patients (259 men and 64 women; age 18-79 years) underwent PVI for treatment of drug-refractory symptomatic AF. An ostial isolation of the pulmonary veins was done using a cooled-tip ablation catheter guided by circular mapping. The patients were divided into three groups based on age (group I: <50 years, group II: 51-60 years, group III: >60 years) and the results were compared. There were 106 patients in group I, 114 patients in group II, and 103 patients in group III (mean age 41.3 +/- 7.8 years, 55.4 +/- 2.75 years, and 66.6 +/- 4.18 years, respectively) who underwent PVI for paroxysmal (53.8%), persistent (10.8%), or permanent (35.3%) AF. Baseline characteristics were similar except for a higher prevalence of hypertension and/or structural heart disease in groups II and III (58% and 63% vs 33% in group I, respectively). The procedural variables were similar in all age groups. The overall risk of complications was similar in the three groups, except that the risk of stroke was significantly higher in patients >60 years of age (3% vs 0%; P < 0.05). The recurrence rates of AF were similar in the three age groups (15.1%, 16.7%, and 18.4%, respectively; P > 0.05). The risk of severe pulmonary vein stenosis (1.8%, 2.6%, and 0.9%, respectively) was low and did not vary with age.PVI is a safe and effective treatment for patients with drug-refractory symptomatic AF, and its benefits extend to all age groups. The risk of procedural complications, especially thromboembolic events, appears to be higher in the elderly age group. This observation needs to be considered while assessing potential candidates for the procedure.
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Paroxysmal atrial fibrillation (AF) is primarily triggered by pulmonary veins (PVs). However, non-PV AF foci may also trigger AF.We examined 207 patients (mean age, 62 ± 11 years; 166 men) who underwent a second catheter ablation (CA) and evaluated the clinical significance of non-PV AF foci on the outcomes.Electrical reconnections between the PVs and left atrium (LA) were observed in 162 patients (78.3%). Non-PV AF foci were identified in 95 patients (45.9%, 60 patients with successfully ablated non-PV AF foci and 35 with unmappable non-PV AF foci). During a median follow-up period of 22.7 months, 61 patients (29.5%; 18/112 [16.1%] without non-PV AF foci vs. 20/60 [33.3%] with successfully ablated non-PV AF foci vs. 23/35 [65.7%] with unmappable non-PV AF foci, P < 0.0001) developed AF recurrence; 52 (85.2%) developed recurrence within 1 year. The presence of non-PV AF foci was a significant clinical predictor of AF recurrence after the second CA; successfully ablated non-PV AF foci increased the AF recurrence risk by 2.24 times (95% confidence interval [CI], 1.12-4.54; P = 0.02), and unmappable AF foci increased this risk by 5.58 times (95% CI, 2.73-11.63; P < 0.0001).Nearly half of the patients had non-PV AF foci at the second CA session. AF recurred after the second CA session in approximately 30%, with most recurrences happening within 1 year. The presence of non-PV AF foci significantly increased the AF recurrence risk after a second CA. When non-PV AF foci were unmappable, the AF recurrence rate was extremely high.
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Summary This study examined the relationship between temperament and sedation failure during magnetic resonance imaging (MRI) and computerized tomography (CT). One hundred and two children (aged 3–7 years) who underwent MRI or CT with or without sedation were studied. Demographics, sedatives administered, efficacy of sedation, and adverse events were recorded. Parents completed the Behavioural Style Questionnaire for 3–7 years olds during their wait. Eight children underwent MRI successfully without sedation, 83 were successfully sedated, and 11 procedures were aborted. Children whose sedation failed were less adaptable than children whose sedation was successful ( P =0.04). Children who underwent MRI without sedation were more persistent than children who were sedated ( P =0.05), and more persistent and less active than those whose sedation failed ( P =0.02 and 0.03, respectively). The child's underlying temperament may contribute to sedation outcomes during MRI and CT. A presedation assessment of the child's temperament may therefore assist in decisions regarding sedation.
Demographics
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Paroxysmal atrial fibrillation
Implantable loop recorder
Isolation
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Sedation is one of ICU routine treatment, understand the harm to patients caused by deep sedation; by enhancing the ability to regulate the sedation nurse, to help early shallow sedation for goal orientation in the implementation of the program is to reduce sedation, sedation complications, effective means of preventing excessive sedation, is an important measure to promote the development of clinical nursing.
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Nurses; Conscious sedation; Deep sedation; Sedation
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