Long-term outcomes of patients with normal fractional flow reserve and thin-cap fibroatheroma.

BACKGROUND: The long-term prognostic implications of fractional flow reserve (FFR)-negative lesions hosting vulnerable plaques remain unsettled. AIMS: The aim of this study was to evaluate the association of non-ischaemic lesions hosting optical coherence tomography (OCT)-detected thin-cap fibroatheromas (TCFA) with first and recurrent cardiovascular events during follow-up up to 5 years in a diabetes mellitus (DM) patient population. METHODS: COMBINE OCT-FFR is a prospective, international, double-blind, natural history study. Patients with DM and with ≥1 FFR-negative lesion were classified into 2 groups based on the presence or absence of ≥1 TCFA lesion. The primary endpoint (PE) is a composite of cardiac mortality, target vessel-related myocardial infarction (TV-MI), clinically driven target lesion revascularisation (TLR), or unstable angina (UA) requiring hospitalisation during follow-up up to 5 years. RESULTS: Among 390 DM patients (age 67.5±9 years; 37% female) with ≥1 FFR-negative lesion, 292 (74.9%) were TCFA-negative while 98 (25.1%) were TCFA-positive. The PE occurred more frequently in TCFA-positive than in TCFA-negative patients (21.4% vs 8.2%, hazard ratio [HR] 2.89, 95% confidence interval [CI]: 1.61-5.20; p<0.001; 6.42 vs 2.46 events per 100 patient-years, rate ratio [RR] 2.61, 95% CI: 1.38-4.90; p=0.002). Furthermore, when TV-MI, TLR, and UA were treated as recurrent components of the PE, TCFA-positive patients experienced a higher risk of recurrent events (HR 2.89, 95% CI; 1.74-4.80; p<0.001; 13.45 vs 2.87 events per 100 patient-years, RR 4.69, 95% CI: 2.86-7.83; p<0.001). A multivariable analysis identified the presence of TCFA as an independent predictor of the PE (HR 2.76, 95% CI: 1.53-4.97; p<0.001). CONCLUSIONS: OCT-detected TCFA-positive lesions, although not ischaemia-generating, are associated with an increased risk of adverse events during long-term follow-up. CLINICALTRIALS: gov: NCT02989740.

Anatomical Assessment vs. Pullback REsting full-cycle rAtio (RFR) Measurement for Evaluation of Focal and Diffuse CoronarY Disease: Rationale and Design of the "READY Register".

Background: The morphology and functional severity of coronary stenosis show poor correlation. However, in clinical practice, the visual assessment of the invasive coronary angiography is still the most common means for evaluating coronary disease. The fractional flow reserve (FFR), the coronary flow reserve (CFR), and the resting full-cycle ratio (RFR) are established indices to determine the hemodynamic significance of a coronary stenosis. Design/Methods: The READY register (NCT04857762) is a prospective, multicentre register of patients who underwent invasive intracoronary FFR and RFR measurement. The main aim of the registry is to compare the visual estimate of coronary lesions and the functional severity of the stenosis assessed by FFR, as well as the RFR pullback. Characterizations of the coronary vessel for predominantly focal, diffuse, or mixed type disease according to visual vs. RFR pullback determination will be compared. The secondary endpoint of the study is a composite of major adverse cardiac events, including death, myocardial infarction, and repeat coronary revascularization at 1 year. These endpoints will be compared in patients with non-ischemic FFR in the subgroup of cases where the local pressure drop indicates a focal lesion according to the definition of ΔRFR > 0.05 (for <25 mm segment length) and in the subgroup without significant ΔRFR. In case of an FFR value above 0.80, an extended physiological analysis is planned to diagnose or exclude microvascular disease using the CFR/FFR index. This includes novel flow dynamic modeling for CFR calculation (CFRp-3D). Conclusion: The READY register will define the effect of RFR measurement on visual estimation-based clinical decision-making. It can identify a prognostic value of ΔRFR during RFR pullback, and it would also explore the frequency of microvascular disease in the patient population with FFR > 0.80. Clinical Trial Registration: ClinicalTrials.gov (NCT04857762).

Thin-cap fibroatheroma predicts clinical events in diabetic patients with normal fractional flow reserve: the COMBINE OCT-FFR trial.

AIMS: The aim of this study was to understand the impact of optical coherence tomography (OCT)-detected thin-cap fibroatheroma (TCFA) on clinical outcomes of diabetes mellitus (DM) patients with fractional flow reserve (FFR)-negative lesions. METHODS AND RESULTS: COMBINE OCT-FFR study was a prospective, double-blind, international, natural history study. After FFR assessment, and revascularization of FFR-positive lesions, patients with ≥1 FFR-negative lesions (target lesions) were classified in two groups based on the presence or absence of ≥1 TCFA lesion. The primary endpoint compared FFR-negative TCFA-positive patients with FFR-negative TCFA-negative patients for a composite of cardiac mortality, target vessel myocardial infarction, clinically driven target lesion revascularization or unstable angina requiring hospitalization at 18 months. Among 550 patients enrolled, 390 (81%) patients had ≥1 FFR-negative lesions. Among FFR-negative patients, 98 (25%) were TCFA positive and 292 (75%) were TCFA negative. The incidence of the primary endpoint was 13.3% and 3.1% in TCFA-positive vs. TCFA-negative groups, respectively (hazard ratio 4.65; 95% confidence interval, 1.99-10.89; P < 0.001). The Cox regression multivariable analysis identified TCFA as the strongest predictor of major adverse clinical events (MACE) (hazard ratio 5.12; 95% confidence interval 2.12-12.34; P < 0.001). CONCLUSIONS: Among DM patients with ≥1 FFR-negative lesions, TCFA-positive patients represented 25% of this population and were associated with a five-fold higher rate of MACE despite the absence of ischaemia. This discrepancy between the impact of vulnerable plaque and ischaemia on future adverse events may represent a paradigm shift for coronary artery disease risk stratification in DM patients.

[A case of destructive cervical spondylarthropathy related to chronic dialysis]. / Krónikus dialízis kapcsán kialakult destruktív cervicalis spondylarthropathia esete.

A case of a 61-year-old male patient suffered chronic renal failure and dialysed for 23 years with destructive cervical spondylarthropathy is presented. The patient presented with sudden onset of cervical pain radiating into his shoulders without neurological deficits. CT and MRI of the cervical and thoracic spine revealed severe destructive changes and compressive fractures of C6 and C7 vertebrae which caused the narrowing of the nerve root canals at these levels. A 360-degree fixation was performed to treat the unstable fracture and the patient's pain (C6 and C7 corpectomy, autolog bone graft replacement of the two vertebral bodies, anterior plate fixation and posterior instrumentation with screws and rods). Postoperatively the patient had no significant pain, no neurological deficit and he was able to manage independent life himself. During the immediate follow-up CT of the neck showed the satisfactory position of the bone graft and the metal implantations. The 6 months follow-up CT revealed the anterior migration of the two screws from the Th1 vertebral body and 2 mm ventral elevation of the caudal end of the plate from the anterior surface of the Th1 vertebral body. The 1-year follow-up could not be performed because the patient died due to cardio-pulmonary insufficiency. This is the second Hungarian report of a chronic dialysis related severe spondylarthropathy which may cause pathologic fractures of the vertebral bodies. The typical radiological and histological findings are discussed. This disease affect patients' quality of life and the conservative treatment alone seems to be ineffective in most cases. Based on the literature and personal experiences, the authors suggest 360-degree fixation of the spine to provide sufficient stability for the vertebrae of "bad bone quality", and early mobilisation of the patient can be achieved.

Catheter directed thrombolytic therapy and aspiration thrombectomy in intermediate pulmonary embolism with long term results.

BACKGROUND: Catheter directed thrombolysis (CDT) and thrombectomy represent well established techniques for the treatment of intermediate pulmonary embolism (IPE). The long-term effect of catheter directed thrombolysis of IPE is unknown. METHODS: Clinical, interventional and echocardiographic data from 80 consecutive patients with IPE who were treated with CDT were evaluated. Primary end-points were technical success and major adverse events. Secondary end-points were cardiovascular mortality, all-cause mortality, clinical success, rate of bleeding complications, improvement in pulmonary pressure and echocardiography parameters. CDT completed with alteplase (10 mg bolus and 1 mg/h maintenance dose) through a pig-tail catheter for 24 h. After 24 h, control pulmonary angiography was performed. RESULTS: In total, 80 patients with a mean age of 59.0 ± 16.8 years were treated. CDT was successful after the first post-operative day in 72 (90%) patients, but thrombus aspiration and fragmentation was performed due to failed thrombolysis in 8 (10%) patients. Final technical and clinical success was reached in 79 (98.8%) and 77 (96.3%) patients, respectively. The mean CDT time in IPE was 27.8 ± 9.6 h. Invasive pulmonary pressure dropped from 57.5 ± 16.7 to 38.9 ± 13.5 (p < 0.001). A caval filter was implanted in 4 (5%) patients. The 1-year major adverse events and cardiovascular mortality rate was 4.0% and 1.4%, respectively. Access site complications (6 major and 6 minor) were encountered in 12 (16.2%) patients. CONCLUSIONS: Catheter directed thrombolysis in submassive pulmonary embolism had excellent results. However, additional mechanical thrombectomy was necessary in some patients to achieve good clinical outcomes.

Short-term stent coverage of second-generation zotarolimus-eluting durable polymer stents: Onyx one-month optical coherence tomography study.

INTRODUCTION: To date the early strut coverage with the second-generation durable-polymer ONYX zotarolimus-eluting stent (O-ZES) is unknown. AIM: Optical coherence tomography (OCT) assessed the strut coverage of O-ZES at thirty-day follow-up. MATERIAL AND METHODS: OCT was performed after implantation and at 1-month follow-up in 15 patients treated with O-ZES. RESULTS: Mean patient age was 67 ±7 years (73% males). The clinical presentation consisted of acute coronary syndromes (n = 13) and stable coronary disease (n = 2). Four (26%) patients had diabetes. OCT analysis was performed at baseline and 1-month follow-up in all stents. 378 cross-sections with 3582 struts were assessed at baseline and 3661 at follow-up. At follow-up, 88% struts were covered by tissue with a median thickness 37.91 µm (IQR: 22.32-64.15). Median in-stent area obstruction by neointima was 2.64% (IQR: 1.70-4.84). From the total stent covered area, 92.3% showed complete strut coverage. Homogeneous tissue was observed in 74% of cases. There were no differences in minimal lumen area (5.07 ±1.08 mm2 vs. 4.81 ±0.94 mm2, p = 0.125) or minimal stent area (4.95 ±1.22 mm2 vs. 4.92 ±0.99 mm2) at baseline and at follow-up. There were no differences in the rate of strut malapposition (4.3% vs. 5.7%, p = 0.417). For all stents, malapposition volume was 47.9 mm3 at baseline and 51.7 mm3 at follow-up, giving the late acquired stent malapposition volume of 3.8 mm3. CONCLUSIONS: The second-generation durable polymer O-ZES showed favorable vessel healing at 30-day OCT follow-up.

Short- and long-term results with a percutaneous treatment in critical hand ischaemia.

BACKGROUND: The aim of this prospective registry was to determine the feasibility, safety, and outcomes of percutaneous transluminal angioplasty and thrombolysis in the treatment of critical hand ischemia (CHI). METHODS: One-hundred one patients (aged 60.6 ± 15.3 years) were treated for CHI between 2012 and 2016 in three cardiovascular centers. Anatomically, the upper arm was divided into three segments (I-subclavian, II-brachial, and III-forearm). We examined the rates of technical and clinical success, major adverse events (MAEs), and vascular complications at 1 year and at long-term follow-up. RESULTS: Nineteen patients (18.8%) were treated for acute CHI, and 82 (81.2%) for chronic CHI. Median follow-up was 36.9 (19.6-68.3) months. Clinical symptoms were isolated rest pain in 91 patients (90.1%) and digital ulcer or gangrene in 10 patients (9.9%). The technical and clinical success rate of intervention was 96.0% (97/101) and 84.2% (85/101) at 1 year. Angioplasty was performed in Segments I, II, and III in 28 (27.7%), in 29 (28.7%), and 44 (43.5%) patients. Stent implantation was necessary in 47 patients (46.8%). Vascular access site complications were found in 2.1% of the sample. After 1 year, MAEs occurred in 27 patients (26.9%), and the target lesion revascularization rate was 11.9%. In two patients (1.9%), thoracic sympatectomy was necessary, and two patients (1.9%) underwent minor finger amputations. CONCLUSIONS: Angioplasty of hand vessels for CHI is a feasible and safe procedure with acceptable rates of technical success and hand healing. MAEs are frequent because the rate of severe comorbidities is high.

Association between VEGF Gene Polymorphisms and In-Stent Restenosis after Coronary Intervention Treated with Bare Metal Stent.

Background. In-stent restenosis (ISR) is the gradual narrowing of the vessel lumen after coronary stent implantation due to the increase in vascular smooth muscle cell proliferation. Vascular endothelial growth factor (VEGF) protein plays an important role in this process. Our aim was to analyze the association of single nucleotide polymorphisms of the VEGF gene (rs2010963 and rs6999447) with the occurrence of ISR after coronary artery bare metal stent (BMS) implantation. Methods. 205 patients with a history of BMS implantation and a repeated coronarography were prospectively enrolled. Patients were assigned to diffuse restenosis group (n = 105) and control group (n = 100) and VEGF genotypes were determined. Results. Diffuse ISR was significantly more frequently observed in patients with homozygous normal genotype of rs2010963 polymorphism, and this polymorphism was independently associated with diffuse ISR. Conclusions. RS2010963 is associated with higher incidence of development of diffuse coronary ISR in patients treated with BMS implantation.

[Long term results after invasive treatment of critical limb ischemia]. / A krónikus kritikus végtagischaemia invazív kezelésének hosszú távú eredményei.

INTRODUCTION AND AIM: Surgical tibial bypass for critical limb ischemia is associated with significant morbidity, mortality, and graft failure, whereas percutaneous angioplasty and stenting has promising results. The objective of this study was the investigation of the long term results of below-knee percutaneous angioplasty for restoring straight inline arterial flow in patients with critical limb ischemia. METHOD: The clinical and angiographic data of 281 consecutive patients with critical limb ischemia treated by PTA between 2008 and 2011 was evaluated in a prospective register. The aim of the revascularization was to achieve a straight inline flow to the wound with balloon angioplasty. Stent implantation was done in the case of recoil and flow limiting dissection. Primary end points were clinical success (relief of resting pain, healing of ulceration, limb survival) and major adverse events (death, myocardial infarction, major unplanned amputation, need for surgical revascularization, or major bleeding). Secondary end points were the angiographic result of the intervention, procedural data and consumption of angioplasty equipment. The impact of diabetic leg syndrome and the result of the angioplasty on the limb salvage was also investigated. We have analysed the impact of major amputation on long term mortality. RESULTS: Mean age of patients was 72.5 ± 10.6 years and the follow-up period was 40.8 ± 9.7 months. Technical success was reached in 255 (90.7%) of the patient's: 255 limbs straight inline flow with good angiographic result was restored to at least one tibial vessel. Balloon angioplasty, stent implantation and rotational atherectomy was performed in 278 (98.9%), 74 (26.3%) and 2 patients (0.7%). From clinical end points the rest pain was ceased in 56.6%, the ulcer and the gangrena was healed in 73.5% and 46.5%. The long term limb survival was 73.5%; 65.8% in diabetic and 89.6% in non-diabetic leg syndrome (p = 0.001). The major adverse events at long-term follow-up occured in 122 (43.8%) patients. Death occured in 57 (20.3%) of the patients during the long-term follow-up: 38 (13.5%) vs. 19 (6.8%) in diabetic vs. non-diabetic leg subgroup, respectively (p = 0.932). Long-term limb saving occured in 72.3% vs. 84.6% of the patients dependening the procedure was successful or unsuccessful (p = 0.225). CONCLUSION: Below-knee stent angioplasty for critical limb ischemia results in good clinical outcome, but the major adverse event rate is high. Diabetes mellitus is associated with a high rate of mortality and amputation. Orv. Hetil., 2017, 158(11), 418-425.

Factors associated with deferred lesion failure following fractional flow reserve assessment in patients with diabetes mellitus.

OBJECTIVE: To explore the predictors of deferred lesion failure (DLF) in patients with diabetes mellitus (DM) and lesions with a fractional flow reserve (FFR) >0.80 and to examine whether a predictive relationship between negative FFR values (>0.80-1.00) and DLF exists. BACKGROUND: DM is associated with rapidly progressive atherosclerosis and predictors of DLF in FFR negative lesions in this high-risk group are unknown. METHODS: All DM patients who underwent FFR-assessment between 1/01/2010 and 31/12/2013 were included, and followed until 1/7/2015. Patients carrying ≥1 FFR negative lesion(s) were assessed for DLF, and multivariate models used to identify independent factors associated with DLF. RESULTS: A total of 205 patients with 252 FFR >0.80 lesions were identified. At a mean follow-up of 3.1 ± 1.4 years, DLF occurred in 29/205 (14.1%) patients, 31/252 (12.3%) lesions. Using marginal Cox regression multivariate analysis, insulin requiring DM [HR 2.24 (95%CI; 1.01-4.95), P = 0.046] and prior revascularization [HR 2.70 (95%CI 1.21-6.01), P = 0.015] were identified as being associated with a higher incidence of DLF. Absolute FFR values in FFR negative lesions in DM patients are not predictive of DLF (receiver operating characteristics curve analysis: area under the curve: 0.57 ± 0.06, 95%CI 0.46-0.69). CONCLUSIONS: In DM patients with FFR negative lesions, insulin requiring DM and prior revascularization are predictors for DLF. In contrast to non-DM patients, no predictive relationship between absolute negative FFR values (ranging >0.80-1.00) and the risk of DLF exists in DM patients. © 2017 Wiley Periodicals, Inc.

High rate of in-stent restenosis after coronary intervention in carriers of the mutant mannose-binding lectin allele.

BACKGROUND: In-stent restenosis occurs in 10-30% of patients following bare metal stent (BMS) implantation and has various risk factors. Mannose-binding lectin (MBL) is known to have effect on the progression of atherosclerosis. Single nucleotide polymorphisms (SNP) of the MBL2 gene intron 1 (codon 52, 54, 57) are known to modulate the bioavailability of the MBL protein. Our aim was to identify the association of these polymorphisms of the MBL gene in the occurrence of in-stent restenosis after coronary artery bare metal stent implantation. METHODS: In a non-randomized prospective study venous blood samples were collected after recoronarography from 225 patients with prior BMS implantation. Patients were assigned to diffuse restenosis group and control group based on the result of the coronarography. MBL genotypes were determined using quantitative real-time PCR. Proportion of different genotypes was compared and adjusted with traditional risk factors using multivariate logistic regression. RESULTS: Average follow-up time was 1.0 (+ - 1.4) year in the diffuse restenosis group (N = 117) and 2.7 (+ - 2.5) years in the control group (N = 108). The age, gender distribution and risk status was not different between study groups. Proportion of the MBL variant genotype was 26.8% (29 vs. 79 normal homozygous) in the control group and 39.3% (46 vs. 71 normal homozygous) in the restenosis group (p = 0.04). In multivariate analysis the mutant allele was an independent risk factor (OR = 1.96, p = 0.03) of in-stent restenosis. CONCLUSIONS: MBL polymorphisms are associated with higher incidence of development of coronary in-stent restenosis. The attenuated protein function in the mutant allelic genotype may represent the underlying mechanism.

Efficacy of drug-eluting balloon in patients with bare-metal or drug-eluting stent restenosis.

INTRODUCTION: In spite of improving results, the treatment of in-stent restenosis (ISR) of bare-metal stents (BMS), and particularly drug-eluting stents (DES), is a challenging clinical problem. There are promising but limited follow-up data concerning drug-eluting balloons in the treatment of BMS and DES restenosis. The goal of this real-world registry was to assess the long-term safety and efficacy of drug-eluting balloons in the treatment of BMS and DES restenosis. METHODS: In this prospective registry, 82 patients with BMS or DES restenosis treated with paclitaxel-eluting balloons were enrolled. The primary endpoint was ischemia-driven target lesion revascularization (TLR); a secondary endpoint was the rate of major adverse cardiac events (MACE) at 28 months. RESULTS: Thirty-five patients (42.7%) had DES ISR and 16 patients (19.5%) presented with an acute coronary syndrome. The success rate of drug-eluting balloon inflation was 97.6%. The median (interquartile range) duration of follow up was 28.0 (25.0-30.3) months. The rate of TLR was 24.5%, and was not significantly higher in the DES-ISR group than in the BMS-ISR group: 29.0% vs. 21.1%, respectively (p=0.687). There were two cases of definite stent thrombosis in the BMS-ISR group and one probable subacute stent thrombosis in the DES-ISR group. The overall MACE rate was 37.0% and did not differ between the DES-ISR and BMS-ISR group (40.8% vs. 34.7%, respectively; p=0.994). CONCLUSIONS: This real-world registry provided less favorable long-term results for drug-eluting balloons in the treatment of BMS restenosis and in DES restenosis, compared to the promising mid-term results of previous studies. The TLR rate was slightly but not significantly higher after DES restenosis compared to BMS restenosis treatment.

Personalized surgical repair of left ventricular aneurysm with computer-assisted ventricular engineering.

OBJECTIVES: Although circular ventricular resection techniques are the gold standard of left ventricular (LV) restoration, these techniques can lead to suboptimal results. Postoperative systolic resection can be inadequate, because it must be planned on a heart stopped in diastole. Low cardiac output due to insufficient LV volume results in a potentially unstable condition, and cannot be corrected. Our aim was to find a preoperative method to minimize risk and maximize outcome with ventricular restoration. METHODS: We created a novel method combining surgery with gadolinium-enhanced magnetic resonance to construct a preoperative 3D systolic heart model. The model was utilized to determine resection points that could be intraoperatively used. According to our calculations with the predetermined resection line, the calculated percentage reduction in LV volume was above 30%, and LV volumes were predicted above normal values; thus, performing the operation using these resection points is likely to be safe and effective. We had a mixed, real-life patient group: mitral insufficiency or pulmonary hypertension were not exclusion criteria. RESULTS: Forty-one procedures (12 concomitant mitral valve plasty) were done on consecutive patients in a single-centre experience. The incidence rate of major adverse clinical events was 32% postoperatively (n = 13). Control MRI showed a significant improvement in ejection fraction (18.3 ± 4.3 vs 31.3 ± 3.3; P = 0.04). All patients improved their New York Heart Association (NYHA) class postoperatively (40 patients NYHA III/IV versus 40 NYHA I/II). During long-term follow-up, 1 patient died due to end-stage heart failure. CONCLUSIONS: Using this model, we were able to find the optimal resection line providing an excellent postoperative result, thus minimizing the risk of low cardiac output syndrome.

A randomised comparison of transradial and transfemoral approach for carotid artery stenting: RADCAR (RADial access for CARotid artery stenting) study.

AIMS: Limited data exist on radial access in carotid artery stenting. This multicentre prospective randomised study was performed to compare the outcome and complication rates of transradial and transfemoral carotid artery stenting. METHODS AND RESULTS: The clinical and angiographic data of 260 consecutive patients with high risk for carotid endarterectomy, treated between 2010 and 2012 by carotid stenting with cerebral protection, were evaluated. Patients were randomised to transradial (n=130) or transfemoral (n=130) groups and several parameters were evaluated. Primary combined endpoint: major adverse cardiac and cerebral events, rate of access-site complications. Secondary endpoints: angiographic outcome of the procedure, fluoroscopy time and X-ray dose, procedural time, crossover rate to another puncture site and hospitalisation in days. Procedural success was achieved in all 260 patients (100%), the crossover rate was 10% in the TR and 1.5% in the TF group (p<0.05). A major access-site complication was encountered in one patient (0.9%) in the TR group and in one patient (0.8%) in the TF group (p=ns). The incidence of major adverse cardiac and cerebral events was 0.9% in the TR and 0.8% in the TF group (p=ns). Procedure time (1,620 [1,230-2,100] vs. 1,500 [1,080-2,100] sec, p=ns) and fluoroscopy time (540 [411-735] vs. 501 [378-702] sec, p=ns) were not significantly different, but the radiation dose was significantly higher in the TR group (195 [129-274] vs. 148 [102-237] Gy*cm2, p<0.05) by per-protocol analysis. Hospitalisation days were significantly lower in the TR group (1.17±0.40 vs. 1.25±0.45, p<0.05). By intention-to-treat analysis there was a significantly higher radiation dose in the TR group (195 [130-288] vs. 150 [104-241], p<0.05), but no difference in major events (0.9 vs. 0.8, p=ns) and length of hospitalisation in days (1.4±2.6 vs. 1.25±0.45, p=ns). CONCLUSIONS: The transradial approach for carotid artery stenting is safe and efficacious; however, the crossover rate is higher with transradial access. There are no differences in the total procedure duration and fluoroscopy time between the two approaches but the radiation dose is significantly higher in the radial group, and the hospitalisation is shorter with the use of transradial access by per-protocol analysis. By evaluating the patient data according to intention-to-treat analysis we found no difference in major adverse events and hospitalisation. In both groups, vascular complications rarely occurred.

Transpedal access after failed anterograde recanalization of complex below-the-knee and femoropoliteal occlusions in critical limb ischemia.

BACKGROUND: Successful angioplasty is one of the main factor of limb salvage during critical limb ischemia. In complex femoropopliteal to infrapopliteal occlusions, an anterograde recanalization attempt can fail in up to 20% of the cases. The purpose of this dual center pilot study was to evaluate the acute success and clinical impact of retrograde transpedal access for retrograde below-the-knee and femoropopliteal chronic total occlusions after failed anterograde attempt and to access the late complications at the puncture site. METHODS: The clinical and angiographic data of 51 consecutive patients with CLI treated by retrograde transpedal recanalization between 2010 and 2011 were evaluated in a pilot study. We have examined the 2-month and 1 year major adverse events (MAEs) and clinical success. In all cases after failure of the anterograde recanalization of occluded below-the-knee segments due to unsuccessful penetration or failed re-entry, the anterior tibial or posterior tibial artery was punctured under fluoroscopic guidance and retrograde recanalization was performed. Direct revascularization was tried firstly following the angiographic zones, but in failed cases indirect revascularization was carried out with increasing the collateral flow to the wound. RESULTS: Successful direct retrograde revascularization was achieved successfully in 40 patients (78.4%) and indirect revascularization was done in 10 patients (19.6%). Revascularization was failed in one patient (2%). MAE at 2 and 12 months follow-up was 6 (11.7%) and 11 (24%). Limb salvage at 2 and 12 months was 93% and 82.3%, respectively. Balloon angioplasty was performed in all interventions and provisional stenting was done in 34 patients (66.7%). One major and three minor vascular complications occurred after the procedure. The mean basal and control creatinine level was 120.9 ± 133.4 and 123.8 ± 131.3 µmol/L (P = 0.83) after the procedure. CONCLUSION: Failed antegrade attempts to recanalize CTO-s of femoropopliteal and infrapopliteal vessels can be salvaged using a retrograde transpedal access, with a low acute and late complication rate. This technique could be valuable for patients with critical limb ischemia due to femoropopliteal and infrapopliteal occlusions.

Long-term clinical follow-up after drug-eluting stent implantation for bare metal in-stent restenosis.

OBJECTIVES: We aimed to evaluate the long-term safety and efficacy of drug-eluting stent (DES) implantation in the treatment of diffuse bare metal stent (BMS) restenosis as compared to the treatment of de novo coronary lesions in high restenosis risk patient population. BACKGROUND: To date limited long-term data are available about the treatment of BMS restenosis with DES. METHODS: Five hundred and fourteen consecutive patients who underwent DES implantation between January 2003 and October 2006 at our institute were studied: 201 patients received DES for treatment of BMS restenosis and 313 patients received DES for high restenosis risk de novo lesions. Outcomes were calculated using propensity score adjustment. Mean follow-up length was 45.6 ± 21.5 months. RESULTS: The rates of acute coronary syndrome, three-vessel disease, and diabetes were high in both restenosis and de novo groups: 44.8% versus 46.3%, 20.9% versus 28.7%, and 34.3% versus 38.9%, respectively. The incidence of ischemia-driven target lesion revascularization (TLR) yielded similar results in the restenosis group and de novo group at 4 years (10.4% vs 12.4%, P = 0.490). All-cause mortality was lower in the restenosis group at 4 years (7.4% vs 14.7%, P = 0.032); however, the incidence of definite and probable stent thrombosis did not differ (1.9% vs 1.6%, P = 0.708) between the 2 groups. CONCLUSIONS: DESs are safe in the treatment of diffuse BMS restenosis and the rate of additional TLR is acceptable as compared to the use of DES in de novo lesions.

Chemical etching of nitinol stents.

At present the main cause of death originates from cardiovascular diseases. Primarily the most frequent cause is vessel closing thus resulting in tissue damage. The stent can help to avoid this. It expands the narrowed vessel section and allows free blood flow. The good surface quality of stents is important. It also must have adequate mechanical characteristics or else it can be damaged which can easily lead to the fracture of the implant. Thus, we have to consider the importance of the surface treatment of these implants. In our experiments the appropriate design was cut from a 1.041 mm inner diameter and 0.100 mm wall thickness nitinol tube by using Nd:YAG laser device. Then, the stent was subjected to chemical etching. By doing so, the burr created during the laser cutting process can be removed and the surface quality refined. In our research, we changed the time of chemical etching and monitored the effects of this parameter. The differently etched stents were subjected to microscopic analysis, mass measurement and in vivo environment tests. The etching times that gave suitable surface and mechanical features were identified.

Significance of off-hours in centralized primary percutaneous coronary intervention network.

AIM: To analyze the efficacy of a regionally organized primary percutaneous coronary intervention (PCI) network at the Heart Center, Semmelweis University Budapest, part of the "Budapest model," and the factors that influence it. METHODS: In order to investigate the differences between regular and off-hours patient care in a 24-hour myocardial infarction primary care system, we included 1890 consecutive, unselected patients with ST-segment elevation myocardial infarction and followed them until at least one year. The follow-up was complete for all participants. RESULTS: The difference between regular hours and off-hours mortality was not significant either after 30 days (8.6% vs 8.8%, respectively) or after 1 year (15.3% vs 14.7%, respectively). The rate of patients with re-infarction, frequency of re-intervention, and major adverse cardiac events, including death, re-infarction, re-intervention, and coronary artery bypass graft surgery, were similar in both patient groups. The time delay between the onset of chest pain and arrival to the clinic was 5.9+/-5.8 hours (mean+/- standard deviation) during regular hours and 5.2+/-4.6 hours during off-hours (P=0.235). Direct transport caused significant decrease in the 30-day and 1-year mortality independent of duty time (7.2% vs 9.9%, P=0.027; 12.6% vs 16.7%, P=0.028; respectively). CONCLUSION: Centralized primary PCI network of the "Budapest model" achieved the same level of patient care during both off-hours and regular hours.