[Show abstract][Hide abstract] ABSTRACT: Background:
The relationship between pulmonary vein (PV) potential (PVP) disappearance patterns during encircling ipsilateral pulmonary vein isolation (EIPVI) of atrial fibrillation (AF), and outcome was examined.
Methods and results:
A total of 352 consecutive AF patients (age, 61±12 years; 269 men, 76.4%; paroxysmal AF, n=239; persistent AF, n=73; and long-standing persistent AF, n=40) who underwent initial AF ablation were studied. After EIPVI with a double Lasso technique, pacing was performed from the PV carina to confirm isolation of the carina. PVP disappearance patterns were classified into 3 types: A, both superior and inferior PVP disappeared simultaneously; B, superior and inferior PVP disappeared separately; and C, additional RF applications were required inside the encircling lesions to eliminate the PVP after creating anatomical encircling lesions. The relationship between these patterns and outcome was examined. Six groups were defined according to the combination of right and left ipsilateral PVP disappearance patterns. The incidence of A-A, A-B, B-B, A-C, B-C, and C-C was 7.1%, 14.2%, 16.2%, 15.3%, 27.3%, and 19.9%, respectively. AF recurrence-free rate at 2 years for these 6 groups was 96%, 81%, 78%, 64%, 64%, and 59%, respectively (P<0.02). The incidence of a carina isolation was 153/154 (99.4%) for type A, 221/259 (85.3%) for type B, and 145/290 (50.0%) for type C.
PVP disappearance pattern during EIPVI was significantly associated with the incidence of residual PV carina conduction and AF recurrence.
Full-text · Article · Dec 2013 · Circulation Journal
[Show abstract][Hide abstract] ABSTRACT: Objective:
Sirolimus-eluting stent (SES) has shown a significant efficacy in reducing restenosis after percutaneous coronary interventions. However, an increase in total number of SES use along with targeting more complex lesions generated a large number of SES restenosis. This study aimed to investigate the clinical and angiographic outcomes of different revascularization strategies for SES restenosis.
Methods and results:
A total of 176 lesions in 149 patients were included in the study. Fifteen patients underwent coronary artery bypass graft surgery (CABG group) and the remaining patients were treated with percutaneous coronary intervention (PCI). Stent reimplantation was performed in 88 patients (Stent group), whereas 46 patients received balloon therapy (Balloon group). Among 176 lesions, major cardiac adverse event (MACE) occurred in 41 lesions (23.3%) during a median follow-up of 310 days (interquartile range: 146-517 days). The Kaplan-Meier method with a log-rank test revealed no significant difference in MACE rates between the three groups (6%, 25%, 26%, p = 0.13; CABG group, Stent group, Balloon group, respectively). However, when the Balloon group and Stent group were combined together as a PCI group, PCI group had a significantly higher rate of MACE compared with the CABG group (p = 0.04). In addition, angiographic restenosis was significantly less prevalent in the CABG group when compared with the other two groups (8%, 57%, 46%, p = 0.006; CABG group, Stent group, Balloon group, respectively).
CABG surgery for patients with SES restenosis is associated with the better clinical outcomes as well as better angiographic outcomes when compared with that of PCI.
No preview · Article · Jan 2013 · Journal of Cardiac Surgery
[Show abstract][Hide abstract] ABSTRACT: Objectives:
Recurrent in-stent restenosis remains an important clinical issue after a percutaneous coronary intervention even after treatment with a sirolimus-eluting stent (SES) especially in patients with chronic kidney disease. We evaluated the impact of renal insufficiency on the clinical and angiographic outcomes after treatment for SES restenosis.
Methods and results:
A total of 74 patients with 76 lesions underwent subsequent revascularization with a drug-eluting stent for SES restenosis. Patients were classified into three groups: group 1 included 29 patients with an estimated glomerular filtration rate more than 60 ml/min/1.73 m(2); group 2 included 27 patients with lower estimated glomerular filtration rate (<60 ml/min/1.73 m(2)) without hemodialysis (HD) dependence; and group 3 included 18 patients on HD. Clinical and angiographic follow-up was carried out at 8 months. Late lumen loss at the 8-month follow-up angiography showed progressive increases from group 1 to 2 to 3 (group 1: 0.36 ± 0.39 mm, group 2: 1.11 ± 0.61 mm, group 3: 1.30 ± 0.85 mm, P<0.001). Similarly, compared with group 1, groups 2 and 3 had significantly higher rates of major adverse cardiac events (6.9, 37.0, and 38.9%, respectively, P=0.001), primarily because of a high frequency of target lesion revascularization (8.0, 34.8, and 33.3%, respectively, P=0.019).
Non-HD-dependent chronic kidney disease patients had increased neointimal growth in the follow-up phase after percutaneous coronary intervention, with a drug-eluting stent for SES restenosis almost equivalent to patients on HD, resulting in higher rates of recurrent restenosis than patients with preserved renal function.
[Show abstract][Hide abstract] ABSTRACT: AimsEncircling ipsilateral pulmonary veins (PVs) isolation (EIPVsI) with the double-Lasso technique has proven to be effective to cure atrial fibrillation (AF). However, in this technique, PV mapping with circular catheters may miss a non-isolation of the PV carina. The purpose of this study was to reveal the incidence and clinical significance of a non-isolation of the PV carina after EIPVsI.Methods and resultsWe studied 81 consecutive paroxysmal AF patients (age 61 ± 12 years, 56 men), in whom EIPVsI was successfully performed in one encircling line with the endpoint of the demonstration of bidirectional conduction block between the PVs and left atrium (LA) with the double-Lasso technique. After a successful EIPVsI, pacing from the PV carina was performed and it captured the LA in 17 (21.0%) patients. During a mean follow-up period of 19 ± 13 months, AF recurred in 13 (16.0%) patients. A multivariate Cox proportional analysis revealed that a non-isolation of the PV carina after the EIPVsI was a significant predictor (hazard ratio = 3.91, 95% confidence interval = 1.13-14.16, P = 0.03) of AF recurrence. Conclusions
Pulmonary vein mapping with the double-Lasso technique did miss the non-isolation of the PV carina after a successful EIPVsI, which was an independent predictor of AF recurrence after the EIPVsI. Pacing from the PV carina may be required to confirm the electrical isolation of the PV carina after EIPVsI with the double-Lasso technique.
[Show abstract][Hide abstract] ABSTRACT: INTRODUCTION: : The purpose of this study was to investigate whether the effects of renin-angiotensin system inhibitors (RASIs) after encircling ipsilateral pulmonary veins isolation (EIPVsI) for atrial fibrillation (AF) differed between patients with non-dilated and dilated left atria. MATERIALS AND METHODS: : We retrospectively studied 292 consecutive patients (mean age=61±11 years, 75% males) who underwent successful EIPVsI for paroxysmal or persistent AF. RASIs' effects were compared between the patients with a non-dilated left atrium of <40 mm (n=178) and dilated left atrium of ≥40 mm (n=114). RESULTS: : During a mean follow-up period of 18.9±12.7 months, AF recurred in 38 (21.4%) and 45 (39.5%) patients with non-dilated and dilated left atria, respectively. A multivariate Cox proportional analysis revealed that treatment with RASIs (hazard ratio (HR) 0.30, 95% confidence interval (CI) =0.13-0.66, p=0.003), the duration of AF (HR 1.08/year, 95% CI=1.01-1.16, p=0.03), a history of hypertension (HR 2.86, 95% CI=1.21-6.85, p=0.02) and the left ventricular ejection fraction (HR 0.54/10%↑, 95% CI=0.34-0.87, p=0.01) were associated with AF recurrences in patients with a non-dilated left atrium. On the other hand, only the duration of AF (HR 1.11/year, 95% CI=1.01-1.21, p=0.03) was associated with AF recurrences in those with a dilated LA, and RASIs had no effect on AF recurrences (p=0.65). CONCLUSIONS: : RASIs suppressed AF recurrences after EIPVsI only in patients with a non-dilated left atrium.
Full-text · Article · May 2012 · Journal of Renin-Angiotensin-Aldosterone System
[Show abstract][Hide abstract] ABSTRACT: In-stent restenosis has been a longstanding problem after percutaneous coronary intervention. The introduction of the drug-eluting stent (DES) successfully reduced the rate of restenosis; however, it is not completely diminished. Although restenosis occurs less frequently compared to the bare-metal stent (BMS), DES restenosis remains a familiar problem due to the increasing total number of implanted DESs as well as the targeting of more complex lesions. In addition, worse outcomes after repeat revascularization compared to BMS restenosis are reported in DES restenosis. Management of DES restenosis is an emerging issue, which requires careful evaluation of the restenosed lesion, together with cautious determination of therapeutic strategy. In this review, available repeat revascularization procedures for DES restenosis as well as possible impacting factors on the outcomes are discussed.
No preview · Article · Apr 2012 · The Journal of invasive cardiology
[Show abstract][Hide abstract] ABSTRACT: Introduction:An additional approach may be essential to reduce recurrences of atrial fibrillation (AF) after pulmonary vein isolation (PVI). We examined the efficacy of renin-angiotensin system blockers (RAS-B) in suppressing AF recurrences after PVI.
Methods and Results:We retrospectively studied 264 consecutive patients (195 male, median age: 63 years) who underwent successful PVI of paroxysmal (n = 94) or persistent AF (n = 170). RAS-B treatment was performed in 145 patients (angiotensin-converting enzyme inhibitors; n = 13, angiotensin receptor blockers; n = 129, both; n = 3). Echocardiography was performed before and 3 months after the ablation to examine the occurrence of left atrial structural reverse remodeling (LA-RR). After a median follow-up of 195 (interquartile range: 95–316) days, AF recurred in 51 (19.3%) patients. A Cox regression analysis revealed that AF recurrence was significantly lower in the patients with RAS-B than in those without (hazard ratio [HR] = 0.41 [95% confidence interval (CI): 0.23–0.71], P = 0.002). After a multivariate adjustment for potential confounders, the use of RAS-B (HR = 0.39 [95% CI: 0.19–0.77], P = 0.007) and type of AF (HR = 0.30 [95% CI: 0.13–0.66], P = 0.003) were the independent predictors for AF recurrence during the entire follow-up. Although effect of RAS-B was not significant during the early follow-up (<3 month), it was the only independent predictor during the late follow-up (>3 months) (HR = 0.21 [95% CI: 0.08–0.53], P = 0.001). There were no significant differences in LA-RR occurrence regarding RAS-B medication. The use of RAS-B was an independent predictor of late AF recurrences irrespective of an early LA-RR occurrence.
Conclusions:Treatment with RAS-B significantly reduced the AF recurrence after PVI. This benefit became more prominent 3 months after the PVI. (PACE 2011; 34:296–303)
Full-text · Article · Feb 2011 · Pacing and Clinical Electrophysiology
[Show abstract][Hide abstract] ABSTRACT: Restenosis of saphenous vein grafts (SVG) after bare-metal stent (BMS) implantation remains a clinical problem. Recently, intravascular optical coherence tomography (OCT) has been proposed as a high resolution intravascular imaging modality, and is able to distinguish several components of intracoronary structures. In vivo images of in-stent restenosis (ISR) lesions in an SVG using OCT have not been reported. In this case report, we present the characteristics of in vivo OCT images from an ISR lesion of an SVG after BMS implantation.
Preview · Article · Jun 2010 · Journal of Cardiology Cases