BACKGROUND: Studies comparing alternative autologous vein grafts (AAVGs) to single-segment great saphenous vein (ssGSV) grafts report mixed results. The status of AAVG as first choice when ssGSV is unavailable is not unequivocal based on current evidence. Our study compares results between AAVG and ssGSV in lower extremity bypass (LEB) surgery. METHODS: A single-center retrospective cohort study involving all patients who underwent infrainguinal bypass using AAVG (arm veins, spliced arm, or arm-leg veins) and ssGSV from April 2019 to June 2023. Study endpoints were patency rates and amputation-free survival (AFS). RESULTS: There were 65 (20.8%) patients in the AAVG group, 247 (79.2%) in the ssGSV group. Chronic limb-threatening ischemia (CLTI) was the most frequent indication for surgery (AAVG 54/65, 83.1% vs. ssGSV 170/247, 68.8%), followed by acute limb ischemia (ALI) (AAVG 6/65, 9.2% vs. ssGSV 28/247, 11.3%); claudicants were presented only in the ssGSV group (AAVG 0/65, 0% vs. ssGSV 44/247, 17.8%). More redo operations occurred in AAVG than in the ssGSV group (23/65, 35.4% vs. 26/247, 10.5%; P < 0.001). Spliced vein grafts represented 87.7% (57/65) of AAVG bypasses. The median follow-up was 20.1 months for the AAVG group and 27.5 for the ssGSV group. Three-year patency rates between AAVG versus ssGSV: primary patency (PP) 59.3% ± 8.2% versus 69.2% ± 3.8%, P = 0.113; primary assisted patency (PAP) 75.2% ± 7.1% versus 73.5% ± 3.4%, P = 0.790; secondary patency (SP) 74.9% ± 7.1% versus 74.4% ± 3.4%, P = 0.667; did not display significant difference between groups nor did 3-year AFS in CLTI patients; 70.7% ± 7.9% versus 54.6% ± 4.8%; P = 0.273. CONCLUSION: AAVGs should be the first conduit choice when ssGSV is unavailable. Mid-term patency rates do not differ from those of ssGSV grafts despite higher reintervention rate.

• MeSH
• amputace MeSH
• autologní transplantace MeSH
• časové faktory MeSH
• dolní končetina * krevní zásobení   MeSH
• ischemie * chirurgie   patofyziologie   diagnostické zobrazování   MeSH
• lidé středního věku MeSH
• lidé MeSH
• okluze cévního štěpu patofyziologie   etiologie   chirurgie   MeSH
• onemocnění periferních arterií * chirurgie   patofyziologie   diagnostické zobrazování   mortalita   MeSH
• průchodnost cév MeSH
• retrospektivní studie MeSH
• rizikové faktory MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• transplantace cév * škodlivé účinky   MeSH
• vena saphena * transplantace   patofyziologie   MeSH
• výsledek terapie MeSH
• záchrana končetiny MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• srovnávací studie MeSH

Renal hypouricemia sometimes leads to exercise-induced acute kidney injury (EIAKI) of unknown pathogenesis. In order to elucidate the various pathological conditions associated with hypouricemia, we analyzed the effects of low uric acid level on energy metabolism. We have modified semi-ischemic forearm exercise test and performed this test in one Japanese healthy volunteer, three patients with hereditary renal hypouricemia and one patient with hereditary xanthinuria of Czech origin. Forearm exercise was performed by squeezing a hand dynamometer with the sphygmomanometer cuff pressure kept at the mean arterial pressure. Venous blood was drawn five times (before exercise, 3, 10, 30, 45 minutes after the start of exercise) in each tests. The mean plasma lactate concentration increased from a baseline of 1.3 (range 0.7-1.8 mmol/L) to 4.0 (range 2.0-5.5 mmol/L) at 3 minutes after the start of exercise. The plasma hypoxanthine concentrations were quite low before exercise (0-2.9 μmol/L), but increased markedly to a range of 13.6-28.8 μmol/L after 10 minute forearm ischemia. Our protocol allowed us to conclude that the load was sufficient for observing metabolic changes in temporally hypoxia and in following recovery phase. The test was well tolerated and safe, we did not observe any adverse reactions including EIAKI.

• MeSH
• dospělí MeSH
• hypoxanthin krev   MeSH
• ischemie komplikace   patofyziologie   MeSH
• kyselina mléčná krev   MeSH
• kyselina močová krev   MeSH
• lidé středního věku MeSH
• lidé MeSH
• močové kameny komplikace   MeSH
• předloktí krevní zásobení   patofyziologie   MeSH
• vrozené poruchy tubulárního transportu komplikace   MeSH
• zátěžový test * MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

Acute limb ischemia is a vascular emergency defined as a sudden decrease in limb perfusion associated with a risk of loss of viability of the affected extremity. Surgical treatment (Fogarty thromboembolectomy) is indicated only in suprainguinal occlusions. Other cases of acute and subacute limb ischemia should be managed percutaneously. Catheter-based treatment involves local thrombolysis and percutaneous mechanical thrombectomy (PMT). There are several devices in use for PMT; of them, the Rotarex system appears to be the most useful. There are no randomized studies comparing thrombolysis and PMT. Only indirect comparison is possible. The immediate and long-term results of PMT using the Rotarex device are probably more favorable than those following thrombolysis. Particularly for older and polymorbid patients, it may be significant that PMT, in comparison with thrombolysis, can restore blood flow faster and in one session; no contraindications for PMT in contrast to potentially life-threatening complications in thrombolysis exist, and there is also no need for observation in intensive care unit after PMT. Hospital stay after PMT is shorter. There is only one exception when thrombolysis cannot be replaced by Rotarex PMT - in the case of crural arteries involvement - due to the catheter size. In our opinion, PMT is superior to thrombolysis in the treatment of acute and subacute limb ischemia. Thrombolysis should be considered only in special cases, e.g. in crural arteries occlusions or in failure of mechanical thrombectomy.

• MeSH
• ischemie patofyziologie   terapie   MeSH
• končetiny krevní zásobení   patofyziologie   MeSH
• lidé MeSH
• miniinvazivní chirurgické výkony MeSH
• regionální krevní průtok MeSH
• trombektomie metody   MeSH
• trombolytická terapie metody   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH

PURPOSE: To report the results of a prospective, single-arm study to establish whether the initial treatment of acute or subacute limb ischemia (ALI and SLI, respectively) can be accomplished successfully using endovascular mechanical debulking of the target vessels to avoid the risks associated with thrombolysis and/or open surgery. MATERIALS AND METHODS: From April 2009 to April 2015, 316 consecutive patients (mean age 70.9±12 years; 184 men) with ALI (202, 63.9%) or SLI (114, 36.1%) were enrolled; the only exclusion criterion was irreversible ischemia. The ALI group included 146 (72.3%) participants with category IIb ischemia and 56 (27.7%) with category IIa. Critical limb ischemia was diagnosed in 74 (64.9%) of the 114 patients with SLI. Target occlusions of thrombotic (n=256) or embolic (n=60) origin were located in the femoropopliteal segment (n=231), prosthetic or venous femoropopliteal bypass grafts (n=75), and the aortoiliac segment (n=35). The mean occlusion length was 22.9±14.8 cm. RESULTS: The overall technical success (residual stenosis ≤30%) was 100% after debulking and adjunctive techniques (aspiration, dilation, stenting) at the level of the target lesions. No open surgical or thrombolytic modalities were necessary to bypass or recanalize the target vessels, and no death occurred in association with target occlusion therapy. Additional infrapopliteal interventions were performed in 195 (61.7%) patients (adjunctive thrombolysis in 29) to treat acute, subacute, and chronic lesions. Minor complications directly related to the debulking procedure occurred in 26 (8.2%) patients. Serious complications occurred in 11 (3.5%) patients, including hemorrhage in 8 (2.5%) patients (associated with infrapopliteal thrombolysis in 5). At 30 days, primary and secondary patency rates were 94.3% and 97.2%, respectively; mortality was 0.3% (1 fatal intracranial hemorrhage after adjunctive thrombolysis). Of 229 patients eligible for 1-year follow-up, amputation-free survival was estimated to be 87.4% in 199 patients with available data. CONCLUSION: In this all-comers study, mechanical debulking with the Rotarex alone or with adjunctive techniques is feasible as a primary therapy for occluded supratibial vessels in patients with ALI or SLI.

• MeSH
• akutní nemoc MeSH
• amputace MeSH
• časové faktory MeSH
• doba přežití bez progrese choroby MeSH
• dolní končetina krevní zásobení   MeSH
• dospělí MeSH
• endovaskulární výkony * škodlivé účinky   přístrojové vybavení   mortalita   MeSH
• ischemie diagnostické zobrazování   mortalita   patofyziologie   terapie   MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladý dospělý MeSH
• onemocnění periferních arterií diagnostické zobrazování   mortalita   patofyziologie   terapie   MeSH
• prospektivní studie MeSH
• průchodnost cév MeSH
• recidiva MeSH
• rizikové faktory MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• trombektomie * škodlivé účinky   přístrojové vybavení   mortalita   MeSH
• trombolytická terapie MeSH
• záchrana končetiny MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladý dospělý MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• klinické zkoušky MeSH
• Geografické názvy
• Česká republika MeSH

OBJECTIVES: The Tack implant is designed for focal, minimal metal management of dissections. This study evaluated Tacks for treating postpercutaneous transluminal angioplasty (PTA) dissection in patients with below-the-knee (BTK) arterial occlusive disease. BACKGROUND: PTA is the most commonly used endovascular treatment for patients with occlusive disease of the BTK vessels. Post-PTA dissection is a significant clinical problem that results in poor outcomes, but currently there are limited treatment options for managing dissections. METHODS: This prospective, single-arm study evaluated patients with CLI and BTK lesions; 11.4% were Rutherford category (RC) 4 and 88.6% were RC 5. BTK occlusive disease was treated with standard PTA and post-PTA dissections were treated with Tack placement. The primary safety endpoint was a composite of major adverse limb events (MALE) and perioperative death (POD) at 30 days. Other endpoints included: device success; procedure success (vessel patency in the absence of MALE); freedom from clinically driven target lesion revascularization (CD-TLR); primary patency; and changes in RC. Data through 12 months are presented. RESULTS: Thirty-two of 35 (91.4%) patients had post-PTA dissection and successful deployment of Tacks. Procedural success was achieved in 34/35 (97.1%) patients with no MALEs at 30 days. The 12-month patency rate was 78.4% by vessel, 77.4% by patient, and freedom from CD-TLR was 93.5%. Significant (P < .0001) improvement from baseline was observed in RC (75% of patients improved 4 or 5 steps). CONCLUSION: Tack implant treatment of post-PTA dissection was safe and effective for treatment of BTK dissections and resulted in reasonable 12-month patency and low rates of CD-TLR.

• MeSH
• balónková angioplastika škodlivé účinky   přístrojové vybavení   mortalita   MeSH
• bérec krevní zásobení   MeSH
• časové faktory MeSH
• doba přežití bez progrese choroby MeSH
• endovaskulární výkony škodlivé účinky   přístrojové vybavení   mortalita   MeSH
• ischemie diagnostické zobrazování   mortalita   patofyziologie   terapie   MeSH
• kritický stav MeSH
• lidé MeSH
• onemocnění periferních arterií diagnostické zobrazování   mortalita   patofyziologie   terapie   MeSH
• poranění cév diagnostické zobrazování   etiologie   chirurgie   MeSH
• prospektivní studie MeSH
• protézy - design MeSH
• průchodnost cév MeSH
• rizikové faktory MeSH
• samoexpandibilní metalické stenty * MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• slitiny MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• multicentrická studie MeSH
• Geografické názvy
• Evropa MeSH
• Nový Zéland MeSH

BACKGROUND:: Creation of vascular access leads to considerable local haemodynamic changes with decreased hand perfusion. Distal limb tissues then represent a model of hand ischaemia effect on muscles. The aim of our study was to investigate how the presence of vascular access influences the hand muscle strength in end-stage renal disease patients. METHODS:: We included 52 chronically haemodialysed patients with upper limb access without clinical signs of hand ischaemia. Muscle strength was evaluated by dynamometry. Finger pressure was measured on the second and fourth fingers and averaged for further analysis. Thenar tissue oxygenation (rSO2) was analysed using near-infrared spectroscopy. All examinations were performed in both the hands. Basic laboratory analysis was added. Data were processed with unpaired t-test and correlation analysis. RESULTS:: Hands with dialysis access had lower values of handgrip strength (54.2 ± 29.1 lbs vs 48.6 ± 23.4 lbs, p = 0.0006), systolic finger pressure (127.1 ± 32.0 mmHg vs 101.4 ± 31.6 mmHg, p < 10-8) and of thenar rSO2 (45.8% ± 12.9% vs 42.5% ± 13.3%, p = 0.002). Muscle strength (handgrip) was directly related to the thenar oxygenation ( r = 0.36; p = 0.014) and to the finger systolic pressure ( r = 0.38; p = 0.007) on the access extremity. On the extremity without dialysis access, handgrip strength was inversely related to patient's age ( r = -0.41, p = 0.003), dialysis vintage ( r = -0.32, p = 0.02) and red cell distribution width ( r = -0.37, p = 0.01). CONCLUSION:: The presence of dialysis access leads to the decrease of finger pressure, oxygenation, and also muscle strength even in the absence of clinically overt hand ischaemia. All these parameters are interrelated. This study underlines the consequences of inadequate muscle perfusion.

• MeSH
• arteriovenózní zkrat škodlivé účinky   MeSH
• chronické selhání ledvin diagnóza   patofyziologie   terapie   MeSH
• dialýza ledvin * MeSH
• hemodynamika * MeSH
• ischemie krev   diagnóza   etiologie   patofyziologie   MeSH
• kyslík krev   MeSH
• lidé středního věku MeSH
• lidé MeSH
• regionální krevní průtok MeSH
• ruka krevní zásobení   MeSH
• senioři MeSH
• síla ruky * MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• srovnávací studie MeSH

PURPOSE: To evaluate the relationship between the ischemic index and the oxygen saturation in retinal vessels in patients with retinal vein occlusion. DESIGN: Prospective, cross-sectional study. METHODS: We performed a prospective study. The cohort consisted of 43 eyes of 43 patients with retinal vein occlusions (RVO), 23 of whom had central retinal vein occlusions (CRVO) and 20 who had branch retinal vein occlusions (BRVO). We evaluated the retinal vessel saturation using an automatic retinal oximetry device. The retinal ischemic index (ISI) was determined using ultra-widefield fluorescein angiography. RESULTS: Mean arterial saturation (±SD) was 100% ± 11%, mean vein saturation was 52% ±13%, and mean A-V difference was 48% ± 16% in eyes with BRVO. The average ISI in the same group was 0.48 (range 0-1). There was no statistically significant correlation between the retinal ischemic index and retinal saturation in the BRVO group. The affected eye in the CRVO group had a mean arterial saturation of 101% ± 6%, vein saturation of 44% ± 11 % and A-V difference of 58% ± 10%. The average ISI in the CRVO group was 0.54 (range 0-1). A statistically significant negative correlation between ISI and vein saturation was found in the CRVO group (r = -0.686; P =.0003). A significant positive correlation between ISI and the A-V difference was found in the CRVO group (r = 0.893; P <.0001). CONCLUSIONS: Oxygen saturation in the retinal vein and the arteriovenous difference correlated with the ischemic index in CRVO patients. No correlation was found for BRVO patients.

• MeSH
• fluoresceinová angiografie MeSH
• ischemie patofyziologie   MeSH
• kyslík krev   MeSH
• lidé středního věku MeSH
• lidé MeSH
• okluze retinální žíly patofyziologie   MeSH
• optická koherentní tomografie MeSH
• oxymetrie MeSH
• prospektivní studie MeSH
• průřezové studie MeSH
• senioři MeSH
• spotřeba kyslíku fyziologie   MeSH
• vena centralis retinae fyziologie   MeSH
• zraková ostrost MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

BACKGROUND: Cognitive deficit is a common problem in end-stage renal disease (ESRD) patients. Ultrafiltration and hemodialysis lead to profound hemodynamic changes. The aim of this pilot study was to describe brain and hand oxygenation values in ESRD patients and their changes during hemodialysis. METHODS: Twenty-seven patients treated by chronic hemodialysis and 17 controls patients of the same age were included in the study. Regional saturation of oxygen (SrO2) was measured at the brain frontal lobe and at the hand with dialysis access using the INVOS 5100C. In 17 of ESRD patients, SrO2 was also monitored throughout hemodialysis. Finger systolic blood pressure and basic hemodialysis and laboratory data were collected. RESULTS: Dialysis patients had lower brain and also hand SrO2 values at rest (51.5 ± 10.9 vs. 68 ± 7%, p<0.0001 and 55 ± 16 vs. 66 ± 8%, p = 0.03, respectively). Both values further decreased during the first 35 minutes of hemodialysis (brain SrO2 to 47 ± 8%, p<0.0001 and hand to 45 ± 14%, p<0.0001, respectively). The brain SrO2 decrease was related to the ultrafiltration rate, the hand SrO2 decrease to the finger pressure and to blood hemoglobin. CONCLUSIONS: Chronic dialysis patients suffer from tissue ischemia and that even worsens after the beginning of hemodialysis. This observation may contribute to the understanding of cognitive deficit etiology.

• MeSH
• biologické markery krev   MeSH
• časové faktory MeSH
• čelní lalok krevní zásobení   MeSH
• chronické selhání ledvin diagnóza   terapie   MeSH
• dialýza ledvin škodlivé účinky   MeSH
• dospělí MeSH
• ischemie mozku diagnóza   etiologie   patofyziologie   MeSH
• ischemie diagnóza   etiologie   patofyziologie   MeSH
• kognitivní poruchy etiologie   patofyziologie   psychologie   MeSH
• kyslík krev   MeSH
• lidé středního věku MeSH
• lidé MeSH
• mozkový krevní oběh MeSH
• pilotní projekty MeSH
• regionální krevní průtok MeSH
• rizikové faktory MeSH
• ruka krevní zásobení   MeSH
• rychlost toku krve MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• studie případů a kontrol MeSH
• výsledek terapie MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

• MeSH
• elektronystagmografie metody   využití   MeSH
• elektrookulografie metody   využití   MeSH
• epilepsie MeSH
• infekce centrálního nervového systému diagnóza   etiologie   MeSH
• ischemie diagnóza   patofyziologie   MeSH
• klinický obraz nemoci MeSH
• krvácení diagnóza   etiologie   MeSH
• lidé MeSH
• metencephalon diagnostické zobrazování   patofyziologie   MeSH
• mezencefalon anatomie a histologie   patofyziologie   MeSH
• mozeček diagnostické zobrazování   patofyziologie   MeSH
• nádory mozku diagnóza   etiologie   MeSH
• nemoci thalamu diagnóza   etiologie   MeSH
• roztroušená skleróza diagnóza   etiologie   MeSH
• senzorimotorický kortex * MeSH
• vestibulární aparát * diagnostické zobrazování   patofyziologie   MeSH
• Check Tag
• lidé MeSH

• MeSH
• ateroskleróza diagnóza   etiologie   patofyziologie   MeSH
• cévní mozková příhoda diagnóza   patofyziologie   MeSH
• hypertenze MeSH
• ischemie patofyziologie   MeSH
• kardiovaskulární nemoci * etiologie   mortalita   prevence a kontrola   MeSH
• lidé MeSH
• podpora zdraví * MeSH
• rizikové faktory MeSH
• vzdělávání pacientů jako téma MeSH
• Check Tag
• lidé MeSH