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Loarca J, Liou M, Dawson JC, Simon PW. Evaluation of shoot-growth variation in diverse carrot ( Daucus carota L.) germplasm for genetic improvement of stand establishment. Front Plant Sci 2024; 15:1342512. [PMID: 38708395 PMCID: PMC11066248 DOI: 10.3389/fpls.2024.1342512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/26/2024] [Indexed: 05/07/2024]
Abstract
Carrot (Daucus carota L.) is a high value, nutritious, and colorful crop, but delivering carrots from seed to table can be a struggle for carrot growers. Weed competitive ability is a critical trait for crop success that carrot and its apiaceous relatives often lack owing to their characteristic slow shoot growth and erratic seedling emergence, even among genetically uniform lines. This study is the first field-based, multi-year experiment to evaluate shoot-growth trait variation over a 100-day growing season in a carrot diversity panel (N=695) that includes genetically diverse carrot accessions from the United States Department of Agriculture National Plant Germplasm System. We report phenotypic variability for shoot-growth characteristics, the first broad-sense heritability estimates for seedling emergence (0.68 < H2 < 0.80) and early-season canopy coverage ( 0.61 < H2 < 0.65), and consistent broad-sense heritability for late-season canopy height (0.76 < H2 < 0.82), indicating quantitative inheritance and potential for improvement through plant breeding. Strong correlation between emergence and canopy coverage (0.62 < r < 0.72) suggests that improvement of seedling emergence has great potential to increase yield and weed competitive ability. Accessions with high emergence and vigorous canopy growth are of immediate use to breeders targeting stand establishment, weed-tolerance, or weed-suppressant carrots, which is of particular advantage to the organic carrot production sector, reducing the costs and labor associated with herbicide application and weeding. We developed a standardized vocabulary and protocol to describe shoot-growth and facilitate collaboration and communication across carrot research groups. Our study facilitates identification and utilization of carrot genetic resources, conservation of agrobiodiversity, and development of breeding stocks for weed-competitive ability, with the long-term goal of delivering improved carrot cultivars to breeders, growers, and consumers. Accession selection can be further optimized for efficient breeding by combining shoot growth data with phenological data in this study's companion paper to identify ideotypes based on global market needs.
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Affiliation(s)
- Jenyne Loarca
- Vegetable Crops Research Unit, United States Department of Agriculture, Madison, WI, United States
- Department of Plant and Agroecosystem Sciences, University of Wisconsin–Madison, Madison, WI, United States
| | - Michael Liou
- Department of Statistics, University of Wisconsin–Madison, Madison, WI, United States
| | - Julie C. Dawson
- Department of Plant and Agroecosystem Sciences, University of Wisconsin–Madison, Madison, WI, United States
| | - Philipp W. Simon
- Vegetable Crops Research Unit, United States Department of Agriculture, Madison, WI, United States
- Department of Plant and Agroecosystem Sciences, University of Wisconsin–Madison, Madison, WI, United States
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Djani DM, Liou M, Aravamuthan S, Lau V, Cameron S. A retrospective study of the efficacy of zonisamide in controlling seizures in 57 cats. J Vet Intern Med 2024; 38:1092-1100. [PMID: 38240116 PMCID: PMC10937493 DOI: 10.1111/jvim.16984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 12/15/2023] [Indexed: 03/16/2024] Open
Abstract
BACKGROUND Evidence-based recommendations for antiepileptic drug selection in cats beyond phenobarbital are limited, and additional studies are needed for cats where seizures remain inadequately controlled by administration of phenobarbital alone or for cats that cannot safely receive phenobarbital. OBJECTIVE To compare seizure frequency in cats before and after oral administration of zonisamide and describe adverse clinical or clinicopathologic effects in this cohort. ANIMALS Fifty-seven cats with a history of seizures. METHODS Multicenter, retrospective study. Median number of seizures per month and number of seizure days per month were compared before and after administration of zonisamide in all cats, a subgroup of cats with idiopathic epilepsy (IE), and a subgroup of cats receiving zonisamide as sole therapy. Clinical and clinicopathologic adverse effect data were also reported. RESULTS A median decrease of 1 (P = .001, 95% confidence interval (CI) [-1.0, -0.5]) seizure per month, and 1 (P = .003, 95% CI [-1.5, -0.2]) seizure days per month was found across all cats after oral administration of zonisamide. The subgroup with IE showed median decreases of 1 (P = .03, 95% CI [-2.0, -0.5]) and 2 (P = .01, 95% CI [-2.5, -1.0]), respectively. The most common clinical adverse effects were sedation (17%), ataxia (11%), hyporexia (17%), and emesis (5%). One cat developed mild nonregenerative anemia, 2 cats developed mild metabolic acidosis, and 6 cats showed mild increases in ALT and ALP. CONCLUSION Zonisamide was well tolerated and efficacious in controlling seizure activity in most cats.
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Affiliation(s)
- Dylan M. Djani
- School of Veterinary Medicine, Department of Medical SciencesUniversity of Wisconsin—MadisonMadisonWisconsinUSA
| | - Michael Liou
- School of Veterinary Medicine, Department of StatisticsUniversity of Wisconsin—MadisonMadisonWisconsinUSA
| | - Srikanth Aravamuthan
- School of Veterinary Medicine, Department of StatisticsUniversity of Wisconsin—MadisonMadisonWisconsinUSA
| | - Vivian Lau
- SAGE Veterinary CentersRedwood CityCaliforniaUSA
| | - Starr Cameron
- School of Veterinary Medicine, Department of Medical SciencesUniversity of Wisconsin—MadisonMadisonWisconsinUSA
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Wu K, Spychalla PM, Pereyra M, Liou M, Chen Y, Silva E, Gevens AJ. Impacts of a commercially-available horticultural oil biopesticide (EF-400) on the tomato- Phytophthora infestans pathosystem. Plant Dis 2023. [PMID: 38105459 DOI: 10.1094/pdis-12-22-2968-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Biopesticide fungicides are naturally derived compounds that offer protection from plant diseases through various modes of action, including antimicrobial activity and upregulation of defense responses in host plants. These plant protectants provide a sustainable and safe alternative to conventional pesticides in integrated disease management programs and are especially salient in the management of high-risk and economically important diseases such as late blight of tomato and potato, for which host resistance options are limited. In this study, a commercially available biopesticide, EF400 comprised of clove (8.2%), rosemary (8.1%), and peppermint oils (6.7%) (Anjon AG, Corcoran, CA), was investigated for its effects on the Phytophthora infestans-tomato pathosystem. Specifically, we evaluated the impact of EF400 on P. infestans growth in culture, disease symptoms in planta, and activation of host defenses through monitoring transcript accumulation of defense related genes. The application timing and use rate of EF400 were further investigated for managing tomato late blight. EF400 delayed the onset of tomato late blight symptoms, although not as effectively as the copper hydroxide fungicide Champ WG (Nufarm Americas Inc., Alsip, IL). Pathogen mycelial growth and sporangial quantity on late blight-susceptible tomato leaves were significantly reduced with EF400. The biopesticide also had an enhancing or suppressing effect on the transcript accumulation of three defense related genes, Pin2, PR1a, and PR1b. Our work in exploring a commercially available horticultural oil biopesticide meaningfully contributed to the essential knowledge base for optimizing recommendations for the management of tomato late blight.
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Affiliation(s)
- Kuantin Wu
- University of Wisconsin-Madison, 5228, Plant Pathology, 1630 Linden Drive, Madison, Madison, Wisconsin, United States, 53706;
| | | | - Matthew Pereyra
- University of Wisconsin-Madison, 5228, Plant Pathology, Madison, Wisconsin, United States;
| | - Michael Liou
- University of Wisconsin-Madison, 5228, Department of Statistics, Madison, Wisconsin, United States;
| | - Yu Chen
- University of Wisconsin-Madison, Plant Pathology, Madison, Wisconsin, United States;
| | - Erin Silva
- University of Wisconsin-Madison, 5228, Plant Pathology, Madison, Wisconsin, United States;
| | - Amanda Jane Gevens
- University of Wisconsin, Plant Pathology, 1630 Linden Dr, Rm 689, Madison, Wisconsin, United States, 53706;
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Siu HK, Schultz E, LeBrun S, Liou M, Kwan TW. Safety of Retrograde Tibial-Pedal Access and Intervention in Patients with Single Remaining Non-Occluded Infra-Popliteal Runoff Artery. J Cardiovasc Dev Dis 2023; 10:463. [PMID: 37998521 PMCID: PMC10672062 DOI: 10.3390/jcdd10110463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/31/2023] [Accepted: 11/07/2023] [Indexed: 11/25/2023] Open
Abstract
BACKGROUND The adaptation of retrograde tibial-pedal access for peripheral angiogram and intervention is limited by the lack of operator experience and concern for small distal vessel injury. This study evaluates the safety of the retrograde tibial-pedal access for peripheral angiogram and intervention in patients with two vessel infra-popliteal artery chronic total occlusions, where the access point is the sole remaining non-occluded infra-popliteal artery. METHODS A retrospective analysis of 5687 consecutive patients who underwent peripheral angiograms by retrograde tibial-pedal access via the single remaining non-occluded infra-popliteal artery was performed. Patients who had retrograde tibial-pedal access at the sole remaining infra-popliteal artery confirmed by angiography were included. Clinical and ultrasound data of the accessed infra-popliteal vessel up to 6 months were collected. RESULTS The cohort consisted of 314 patients (152 males; mean age 77.9 years). At 6 months, access vessel complications occurred in 15 patients (4.8%). Access vessel occlusion occurred in 9 out of 314 patients (2.9%), arteriovenous fistula in 4 (1.3%), with spontaneous resolution in 2, pseudoaneurysm requiring thrombin injection in 2 (0.6%) and non-cardiovascular death in 1 (0.3%). No uncontrolled bleeding, procedure-related hospitalizations or limb amputations occurred. CONCLUSIONS Routine primary retrograde tibial-pedal access for lower extremity peripheral artery diagnostic angiography and intervention in patients with single infra-popliteal artery runoff can be safety performed in an outpatient setting with infrequent and manageable complications.
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Affiliation(s)
- Henry K. Siu
- Chinatown Cardiology, P.C., New York, NY 10013, USA (T.W.K.)
- Department of Medicine, Division of Cardiology, Lenox Hill Hospital, New York, NY 10075, USA
| | - Emily Schultz
- Department of Medicine, Division of Cardiology, Lenox Hill Hospital, New York, NY 10075, USA
| | - Sandrine LeBrun
- Department of Medicine, Division of Cardiology, Lenox Hill Hospital, New York, NY 10075, USA
| | - Michael Liou
- Chinatown Cardiology, P.C., New York, NY 10013, USA (T.W.K.)
| | - Tak W. Kwan
- Chinatown Cardiology, P.C., New York, NY 10013, USA (T.W.K.)
- Department of Medicine, Division of Cardiology, Lenox Hill Hospital, New York, NY 10075, USA
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Schultz E, Siu HKH, Liou M, Kwan TW. FEASIBILITY AND SAFETY OF RETROGRADE TIBIAL-PEDAL ACCESS AND INTERVENTION IN PATIENTS WITH OCCLUSIONS IN ALL THREE INFRA-POPLITEAL RUNOFF ARTERIES. J Am Coll Cardiol 2023. [DOI: 10.1016/s0735-1097(23)01480-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Schultz E, Siu H, Liou M, Vrang L, Tan D, Kwan T. CRT-300.07 Safety of Orbital Atherectomy in Patients Without Distal Embolic Protection in Single-Vessel Infra-Popliteal Artery Runoff. JACC Cardiovasc Interv 2023. [DOI: 10.1016/j.jcin.2023.01.182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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Kwan TW, Lee S, Lin P, Liou M, Siu H, Patel A, Ruzsa Z. Tibio-pedal arterial pressure assessment during endovascular intervention to improve quality-of-life in patients with intermittent claudication. Front Cardiovasc Med 2022; 9:1038353. [DOI: 10.3389/fcvm.2022.1038353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 11/15/2022] [Indexed: 11/30/2022] Open
Abstract
ObjectiveThe aim of this study is to compare the quality-of-life (QOL) outcomes and the tibio-pedal arterial pressure post-endovascular intervention.BackgroundPhysiological assessment of peripheral arterial lesions is infrequently performed during endovascular interventions.Materials and methodsWe retrospectively reviewed all 343 patients with intermittent claudication who underwent an endovascular intervention via tibio-pedal artery access from October 2018 to May 2021. The baseline and post-intervention tibio-pedal arterial pressures from the pedal sheaths were measured. QOL was assessed using a pre-validated Walking Impairment Questionnaire (WIQ) score before and at 30-day after intervention. We compared the baseline tibio-pedal arterial pressure, post-intervention tibio-pedal arterial pressure, delta pressure (post-intervention minus baseline), baseline WIQ scores, 30-day WIQ scores, and delta score (30-day minus baseline).ResultsAll 343 patients had successful tibio-pedal accesses. The average tibio-pedal arterial pressure at baseline was 87.0 ± 1.8 mmHg vs. 135.5 ± 1.7 mmHg post-intervention (p < 0.001). Average baseline and 30-day WIQ scores were summation (99.8 ± 3.3 vs. 115.0 ± 3.1, p < 0.001), walking distance (35.7 ± 1.3 vs. 42.5 ± 1.3, p < 0.001), walking speed (21.1 ± 0.9 vs. 23.6 ± 0.8, p = 0.036), stair climbing (4.7 ± 1.4 vs. 24.2 ± 1.4, p = 0.019), and symptoms (18.8 ± 0.2 vs. 20.1 ± 0.2, p < 0.001), respectively. When comparing the increased post-intervention tibio-pedal arterial pressure <60 mmHg vs. ≥60 mmHg, the average delta WIQ scores were all significantly improved with summation (10.0 ± 3.9 to 25.8 ± 5.5, p = 0.01), walking distance (4.1 ± 1.7 to 9.8 ± 2.5, p = 0.02), walking speed (1.5 ± 1.1 to 4.3 ± 1.5, p = 0.02), stair climbing (2.3 ± 1.8 to 9.4 ± 2.5, p = 0.02), and symptoms (1.0 ± 0.3 to 1.8 ± 0.4, p = 0.04), respectively.ConclusionIncreasing the post-intervention tibio-pedal arterial pressure by 60 mmHg can enhance QOL as suggested by improvement of WIQ scores.
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Karls CW, Combs DK, Liou M, Schaefer DM. Alfalfa biotypes with putative enhanced cell wall digestibility and effects on performance of growing beef steers. Transl Anim Sci 2022; 6:txac032. [PMID: 35419514 PMCID: PMC9002142 DOI: 10.1093/tas/txac032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 03/03/2022] [Indexed: 11/14/2022] Open
Abstract
Abstract
Three alfalfa biotypes were chosen based on the presumption that they would be sources of alfalfa herbage that differed in lignin concentration and therefore cell wall digestibility. The hypothesis was that a lesser lignin concentration would result in greater alfalfa neutral detergent fiber (NDF) digestibility and greater beef steer growth performance. The three alfalfa biotypes were HarvXtra (Forage Genetics International), Hi-Gest 360 (Alforex Seeds), and a control alfalfa, and LegenDairy XHD (Winfield Solutions LLC). High-moisture wrapped bales were prepared from second-harvest, d 30 crops. Digestibility of NDF was determined using in vitro incubations and a steer digestibility trial. Alfalfa baleage and trace mineral salt were fed to Angus steers (300 kg initial body weight, 4 pens/treatment) in an 83-day growing-phase trial. Alfalfa acid detergent lignin concentrations were 75.6, 71.8, and 63.0 g/kg dry matter (P = 0.34) for LegenDairy, Hi-Gest and HarvXtra, respectively. Based on in vitro total-tract NDF digestibility coefficients, HarvXtra tended (P ≥ 0.09) to have the highest NDF digestibility. Alfalfa biotype affected in vivo apparent total tract digestibility of NDF (P < 0.001) and there was a trend for an effect on acid detergent fiber digestibility (P = 0.051). Hi-Gest and HarvXtra had similar in vivo apparent NDF digestibilities, which were greater than for LegenDairy (P < 0.05). There was no alfalfa biotype effect on daily alfalfa dry matter intake (DMI; P = 0.51) or average daily gain (P = 0.25) by growing steers. The absence of an effect by the novel alfalfa biotypes on DMI by growing steers suggests that the compositional and digestibility differences of the novel alfalfa biotypes compared to LegenDairy were not sufficient to alleviate the limitation of physical fill (if evident) on DMI. If more disparity in cell wall composition and NDF digestibility were to exist between control and reduced-lignin biotypes, then perhaps an advantage in cattle growth performance for a reduced-lignin alfalfa biotype would be detectable.
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Affiliation(s)
- Caleb W Karls
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - David K Combs
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - M Liou
- Department of Statistics, University of Wisconsin-Madison, Madison, WI, USA
| | - Daniel M Schaefer
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI, USA
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Fadul-Pacheco L, Liou M, Reinemann DJ, Cabrera VE. A Preliminary Investigation of Social Network Analysis Applied to Dairy Cow Behavior in Automatic Milking System Environments. Animals (Basel) 2021; 11:ani11051229. [PMID: 33923167 PMCID: PMC8146444 DOI: 10.3390/ani11051229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Cows are social animals, therefore understanding the ways that they interact can help improve their management and welfare. We used social network analysis (SNA) to data on voluntary cow movement through a sort gate in an automatic milking system to identify pairs of cows that repeatedly passed through a sort gate in close succession (affinity pairs). Results from this exploratory study showed that when cows were separated from their affinity-pair cow the day-day variability in milk production increased by a factor of 3, a possible indicator of stress. The results of this exploratory study suggest that SNA could be used as a tool to better understand the social dynamics of dairy cows and inform group and regrouping process to produce positive outcomes. Abstract We have applied social network analysis (SNA) to data on voluntary cow movement through a sort gate in an automatic milking system to identify pairs of cows that repeatedly passed through a sort gate in close succession (affinity pairs). The SNA was applied to social groups defined by four pens on a dairy farm, each served by an automatic milking system (AMS). Each pen was equipped with an automatic sorting gate that identified when cows voluntarily moved from the resting area to either milking or feeding areas. The aim of this study was two-fold: to determine if SNA could identify affinity pairs and to determine if milk production was affected when affinity pairs where broken. Cow traffic and milking performance data from a commercial guided-flow AMS dairy farm were used. Average number of milked cows was 214 ± 34, distributed in four AMS over 1 year. The SNA was able to identify clear affinity pairs and showed when these pairings were formed and broken as cows entered and left the social group (pen). The trend in all four pens was toward higher-than-expected milk production during periods of affinity. Moreover, we found that when affinities were broken (separation of cow pairs) the day-to-day variability in milk production was three times higher than for cows in an affinity pair. The results of this exploratory study suggest that SNA could be potentially used as a tool to reduce milk yield variation and better understand the social dynamics of dairy cows supporting management and welfare decisions.
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Affiliation(s)
- Liliana Fadul-Pacheco
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA;
- Correspondence:
| | - Michael Liou
- Department of Statistical Science, University of Wisconsin-Madison, Madison, WI 53706, USA;
| | - Douglas J. Reinemann
- Biological and Systems Engineering Department, University of Wisconsin-Madison, Madison, WI 53706, USA;
| | - Victor E. Cabrera
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA;
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Kwan TW, Htun WW, Lee S, Csavajda Á, Patel A, Shah S, Huang Y, Liou M, Merkely B, Ruzsa Z. Approach to Tibiopedal Retrograde Revascularization of Below-The-Knee Peripheral Arterial Diseases With or Without Transradial Guidance Peripheral Angiography. J Invasive Cardiol 2020; 32:6-11. [PMID: 31893502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
OBJECTIVE We sought to compare the use of transradial peripheral angiography to guide retrograde revascularization of below-the-knee (BTK) lesions using tibiopedal access (TPA). BACKGROUND Tibiopedal retrograde revascularization of BTK lesions is an emerging technique in peripheral interventions. METHODS We performed an observational cohort study of 194 consecutive adult patients with critical limb ischemia (CLI) who underwent endovascular intervention for BTK diseases using peripheral angiography and primary TPA access with vs without transradial (TR) guidance at 2 centers (New York, USA and Budapest, Hungary). The primary endpoints were procedure success, 30-day major adverse event rate, 30-day access-site complication rate, and 30-day access-site patency rate by ultrasound. Secondary endpoints were periprocedural complications, fluoroscopy time, procedure length, and crossover rate to femoral access. RESULTS There were 78 patients in the TR-guidance group and 116 patients in the non-TR guidance group. Overall procedure success rates with TR guidance vs without TR guidance were 97% and 98%, respectively. Fluoroscopy times (732.8 ± 615.7 seconds vs 769.8 ± 565.8 seconds; P=NS) and procedure times (46.5 ± 24.4 minutes vs 55.4 ± 12.6 minutes; P=NS) were similar in the TR-guidance group vs the non-TR guidance group, but contrast volumes were higher in the TR-guidance group (100.0 ± 60.1 mL vs 43.8 ± 10.2 mL in the non-TR guidance group; P<.05). There was no difference in 30-day major adverse events, other than higher amputation rate in the TR-guidance group (15.3%), which was attributed to severe baseline complex CLI status in this patient group. There was 1 case of arteriovenous fistula, 1 case of pseudoaneurysm, and 1 case of tibiopedal artery occlusion at 30 days in the group without TR guidance. There were 3 cases (3.8%) of radial artery occlusion in the TR-guidance group. CONCLUSIONS The treatment of CLI with BTK lesions is feasible and safe, with a high procedural success rate and low access-site complication rate using the TPA approach regardless of whether or not TR guidance is utilized.
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Affiliation(s)
- Tak W Kwan
- Icahn School of Medicine at Mount Sinai, 139 Centre St., Rm 307, New York, NY 10013, USA.
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Kwan TW, Parikh S, Patel A, Htun WW, Shah S, Huang Y, Liou M, Ruzsa Z. Functional hemodynamics assessment during endovascular Tibio-pedal retrograde intervention of peripheral arterial disease. Catheter Cardiovasc Interv 2019; 94:256-263. [PMID: 31094088 DOI: 10.1002/ccd.28337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 04/04/2019] [Accepted: 04/30/2019] [Indexed: 11/09/2022]
Abstract
OBJECTIVE We sought to use a novel technique to measure the functional hemodynamics of peripheral arterial lesions during endovascular interventions. BACKGROUND Functional hemodynamics has not been thoroughly evaluated during endovascular interventions. The aim of our study is to evaluate the feasibility and the potential benefits of pedal pressures measurements from tibio-pedal access. METHODS We retrospectively reviewed 100 consecutive patients who underwent endovascular interventions via tibio-pedal artery access between October 3, 2018 and December 15, 2018. Baseline and postintervention pedal pressures from the pedal sheaths were measured. We also evaluated the pedal-brachial index (PBI) which is defined as the pedal sheath pressure divided by the simultaneously brachial cuff pressure. We compared baseline pedal pressures, postintervention pedal pressures, baseline PBI, postintervention PBI, % change of PBI ([postintervention PBI minus baseline PBI]/baseline PBI), and resting ankle-brachial index (ABI) versus baseline PBI in this cohort of patients. RESULTS All 100 patients had successful tibio-pedal artery access. Baseline pedal pressure was 70 + 30 mmHg with post intervention pedal pressure of 133 + 27 mmHg (p < .001). Baseline PBI was 0.75 + 0.24 with post intervention PBI of 1.09 + 0.19 (p < .001). The correlation coefficient of resting ABI vs. baseline PBI was 0.55. The % change of PBI was 63.2 + 52.4%. There was significant improvement of postintervention PBI when compared to baseline PBI in the majority of patients. CONCLUSIONS Obtaining pedal pressures and PBI from tibio-pedal access can be a feasible tool for endovascular interventions. This simple technique can provide us important functional hemodynamics information before and after peripheral revascularization.
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Affiliation(s)
- Tak W Kwan
- Department of Cardiology, Mount Sinai Beth Israel, New York, New York.,Department of Cardiology, Mount Sinai West, New York, New York.,Department of Cardiology, Chinatown Cardiology, PC, New York, New York
| | - Sahil Parikh
- Department of Cardiology, Columbia University Medical Center, New York, New York
| | - Apurva Patel
- Department of Cardiology, Houston Methodist DeBakey Heart and Vascular Center, Houston, Texas
| | - Wah Wah Htun
- Department of Cardiology, Mount Sinai Beth Israel, New York, New York.,Department of Cardiology, Chinatown Cardiology, PC, New York, New York
| | - Sooraj Shah
- Department of Cardiology, Mount Sinai Beth Israel, New York, New York.,Department of Cardiology, Mount Sinai West, New York, New York.,Department of Cardiology, Chinatown Cardiology, PC, New York, New York
| | - Yili Huang
- Department of Cardiology, Mount Sinai Beth Israel, New York, New York.,Department of Cardiology, Chinatown Cardiology, PC, New York, New York
| | - Michael Liou
- Department of Cardiology, Mount Sinai Beth Israel, New York, New York.,Department of Cardiology, Chinatown Cardiology, PC, New York, New York
| | - Zoltan Ruzsa
- Department of Cardiology, Semmelweis University, Budapest, Hungary
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Patel A, Parikh R, Huang Y, Liou M, Ratcliffe J, Bertrand OF, Puma J, Kwan TW. Pseudoaneurysm after transpedal arterial access for evaluation and treatment of peripheral arterial disease. Cardiovascular Revascularization Medicine 2017; 18:123-127. [DOI: 10.1016/j.carrev.2016.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/08/2016] [Accepted: 10/11/2016] [Indexed: 11/30/2022]
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Kwan TW, Patel A, Parikh R, Auguste U, Rosero H, Huang Y, Liou M, Ratcliffe J, Puma J. Comparison of TR Band™ and VasoStat™ Hemostasis Devices following Transpedal Catheterization for Lower Extremity Revascularization for Peripheral Arterial Disease. J Interv Cardiol 2016; 29:424-30. [DOI: 10.1111/joic.12311] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Tak W. Kwan
- Chinatown Cardiology, P.C.; New York New York
- Mount Sinai Beth Israel; New York New York
| | | | | | | | | | - Yili Huang
- Chinatown Cardiology, P.C.; New York New York
- Mount Sinai Beth Israel; New York New York
| | - Michael Liou
- Chinatown Cardiology, P.C.; New York New York
- Mount Sinai Beth Israel; New York New York
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Amoroso NS, Shah S, Liou M, Ratcliffe J, Lala M, Diwan R, Huang Y, Rosero H, Coppola J, Bertrand OF, Kwan TW. Superficial Femoral Artery Intervention by Single Transpedal Arterial Access. J Invasive Cardiol 2015; 27:E236-E241. [PMID: 26524208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND Atherosclerotic disease of the superficial femoral artery (SFA) is frequently seen and can be treated with percutaneous interventions, traditionally via femoral artery access. There are limited reports of transpedal artery access for peripheral artery interventions, but none to date describing routine primary transpedal artery approach for SFA stenting. METHODS In this preliminary study, we report 4 patients who underwent successful endovascular SFA stenting using a single transpedal artery access via a new ultra-low profile 6 Fr sheath (Glidesheath Slender; Terumo Corporation). RESULTS All patients underwent successful SFA stenting without complication. Procedure time varied from 51 to 72 minutes. The mean contrast amount used was 56 mL; mean fluoroscopy time was 21 minutes; mean radiation dose was 91 mGy. At 1-month follow-up, duplex ultrasonography showed that all pedal arteries had remained patent. CONCLUSIONS Transpedal artery approach as a primary approach to SFA stenting appears feasible and safe. Comparative trials with standard percutaneous femoral approach are warranted.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Tak W Kwan
- Mount Sinai Beth Israel Heart Institute, 16th Street at First Avenue, New York, NY 10013 USA.
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Kwan TW, Diwan R, Ratcliffe JA, Huang Y, Patri R, James D, Liou M, Fallahi A, Young B, Nanjundappa A, Daggubati R. Tips and tricks for antegrade recanalization of chronic total occlusions using the CrossBoss catheter. J Invasive Cardiol 2015; 27:E18-E24. [PMID: 25661766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES To provide new strategies and techniques for the successful recanalization of chronic total occlusions (CTOs) with the sole use of the CrossBoss catheter. In addition, some common CTO scenarios are illustrated in detail. BACKGROUND CTOs are one of the most challenging complex coronary lesion subsets to intervene upon. Even with the innovation of specialized catheters, the success rate of antegrade recanalization remains low. METHODS Between June and December 2013, a retrospective analysis of 50 consecutive patients who presented with a planned percutaneous intervention (PCI) of a CTO was performed. In all patients, the CrossBoss catheter was used. No additional reentry devices were necessary. Procedural success was defined as <20% residual stenosis and TIMI-3 distal blood flow of the treated vessel at the end of the procedure. RESULTS The majority of the patients were male (72%), with an average age of 68 years. Thirty percent of patients presented with prior CTO-PCI failure. The average fluoroscopy time was 45.9 minutes and the average amount of contrast use was 273.8 mL. No patient suffered a coronary perforation from the CrossBoss catheter. CONCLUSIONS With increased experience using the CrossBoss catheter, the antegrade success rate of CTOs can be improved. Some tips include identifying the likely course of the artery with the aid of retrograde injection, proper guidewire selection and manipulation, and redirecting the CrossBoss catheter if there is substantial deviation from the original path.
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Affiliation(s)
- Tak W Kwan
- Beth Israel Medical Center, 139 Centre St, Rm 307, New York, NY 10013 USA.
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Kwan TW, Diwan R, Ratcliffe JA, James D, Patri R, Huang Y, Liou M, Nanjundappa A, Daggubati R, Pancholy S, Patel T. The utility of extension catheters in transradial percutaneous coronary intervention. J Invasive Cardiol 2015; 27:28-32. [PMID: 25589697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES To evaluate the use of extension catheters in transradial intervention of complex coronary lesions. BACKGROUND Complex percutaneous coronary intervention (PCI) via transradial approach remains a challenge for many interventionalists, primarily due to the difficulty in obtaining adequate guide catheter support. METHODS A retrospective case series identified 54 patients who presented for PCI of complex coronary lesions. A lesion was defined as complex if it contained severe calcification, proximal tortuosity, chronic total occlusion, or was located distal to a previously implanted stent. After identifying the complex lesions, a conversion to femoral approach was considered, but an attempt via the transradial approach with the use of an extension catheter was chosen as the initial strategy. Specific cases highlighting this approach are illustrated in detail. RESULTS The average age of the patients was 72 years old, with male predominance (55%). The success rate of completing the transradial intervention with the help of an extension catheter was 96%. Stent delivery failed due to severe tortuosity and calcification in only 2 cases. The coronary artery involved was either the left anterior descending (n = 25), the left circumflex (n = 10), the right coronary artery (n = 14), or a saphenous vein graft (n = 5). There were no coronary dissections evident from use of the extension catheter. CONCLUSION In the treatment of complex coronary lesions via the transradial approach, the use of an extension catheter may assist in improving successful intervention and decrease the frequency of crossover to a femoral approach.
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Affiliation(s)
- Tak W Kwan
- Beth Israel Medical Center, 139 Centre St, Rm 307, New York, NY 10013 USA.
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Shah B, Mai X, Tummala L, Kliger C, Bangalore S, Miller LH, Sedlis SP, Feit F, Liou M, Attubato M, Coppola J, Slater J. Effectiveness of fluorography versus cineangiography at reducing radiation exposure during diagnostic coronary angiography. Am J Cardiol 2014; 113:1093-8. [PMID: 24513469 DOI: 10.1016/j.amjcard.2013.12.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 12/08/2013] [Accepted: 12/08/2013] [Indexed: 11/24/2022]
Abstract
Coronary angiography is the gold standard for defining obstructive coronary disease. However, radiation exposure remains an unwanted hazard. Patients referred for coronary angiography with abdominal circumference<45 inches and glomerular filtration rate>60 ml/min were randomized to the fluorography (n=25) or cineangiography (n=25) group. Patients in the fluorography group underwent coronary angiography using retrospectively stored fluorography with repeat injection under cineangiography only when needed for better resolution per operator's discretion. Patients in the cineangiography group underwent coronary angiography using routine cineangiography. The primary end point was patient radiation exposure measured by radiochromic film. Secondary end points included the radiation output measurement of kerma-area product and air kerma at the interventional reference point (Ka,r) and operator radiation exposure measured by a dosimeter. Patient radiation exposure (158.2 mGy [76.5 to 210.2] vs 272.5 mGy [163.3 to 314.0], p=0.001), kerma-area product (1,323 μGy·m2 [826 to 1,765] vs 3,451 μGy·m2 [2,464 to 4,818], p<0.001), and Ka,r (175 mGy [112 to 252] vs 558 mGy [313 to 621], p<0.001) were significantly lower in the fluorography compared with cineangiography group (42%, 62%, and 69% relative reduction, respectively). Operator radiation exposure trended in the same direction, although statistically nonsignificant (fluorography 2.35 μGy [1.24 to 6.30] vs cineangiography 5.03 μGy [2.48 to 7.80], p=0.059). In conclusion, the use of fluorography in a select group of patients during coronary angiography, with repeat injection under cineangiography only when needed, was efficacious at reducing patient radiation exposure.
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Abstract
Abstract
A numerical model for non-isothermal mold filling and curing simulation in thin cavities with preplaced fiber mats was developed based on the control volume method. Both lumped temperature system (i.e. local thermal equilibrium between the resin and the fiber) and unlumped temperature system (i.e. thermal non-equilibrium locally) were considered. A Lagrangian coordinate system was used in the flow front region to improve the energy transfer calculation. Several molding simulation results were presented to show the effect of fiber mat presence (in the mold cavity) on the inlet pressure and temperaturedistribution.
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Affiliation(s)
- R. Lin
- Engineering Research Center for Net Shape Manufacturing, The Ohio State University, Columbus, U.S.A
| | - L. J. Lee
- Engineering Research Center for Net Shape Manufacturing, The Ohio State University, Columbus, U.S.A
| | - M. Liou
- Engineering Research Center for Net Shape Manufacturing, The Ohio State University, Columbus, U.S.A
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Kanei Y, Nakra NC, Liou M, Singh J, Fox JT, Kwan TW. The importance of bifurcation lesions in patients undergoing percutaneous coronary interventions in ST-segment elevation myocardial infarction. Cardiovasc Revasc Med 2013; 14:81-3. [PMID: 23415387 DOI: 10.1016/j.carrev.2012.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 11/27/2012] [Accepted: 12/10/2012] [Indexed: 11/26/2022]
Abstract
BACKGROUND Bifurcation lesions at the time of emergent PCI for STEMI are relatively common. However, there are little data regarding their significance. The objective of this study is to evaluate the impact of bifurcation lesions in the setting of emergent percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI). METHODS In 391 patients who underwent primary and rescue PCI, the clinical characteristics, procedural success, and in-hospital cardiac events were compared retrospectively between the patients with and without bifurcation lesions. The PCI strategy was at the discretion of the operator. RESULTS The culprit artery involved a bifurcation lesion in 54/391 (14%) patients. The baseline clinical characteristics between the groups with and without bifurcation lesions were similar. The majority of bifurcation lesions (81%) were seen in the left anterior ascending (LAD) artery. All lesions were treated with the provisional stenting approach, and only 2 (3%) patients required 2 stents. There were no difference in the procedural success and the final TIMI-3 flow, but PCI of bifurcation lesion required higher amount of contrast use. There was no in-hospital MACE in the bifurcation group. The peak cardiac enzyme, left ventricular function, and length of stay were similar in these 2 groups. CONCLUSIONS Bifurcation lesions are relatively common in emergent PCI for STEMI involving the LAD. It can be safely treated with a provisional stenting approach, and the immediate outcome is similar to non-bifurcation lesions.
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Affiliation(s)
- Yumiko Kanei
- Division of Cardiology, Department of Medicine, Beth Israel Medical Center, New York, NY 10003, USA.
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20
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Kwan TW, Chaudhry M, Huang Y, Liou M, Wong S, Zhou X, Pancholy S, Patel T. Approaches for dislodged stent retrieval during transradial percutaneous coronary interventions. Catheter Cardiovasc Interv 2012; 81:E245-9. [PMID: 22581524 DOI: 10.1002/ccd.24483] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Revised: 04/21/2012] [Accepted: 05/06/2012] [Indexed: 11/11/2022]
Abstract
Transradial percutaneous coronary intervention (PCI) has been associated with a lower incidence of major access site related complications. With the increased implementation of transradial approach in complex PCI, stent dislodgement is unavoidable in any interventionalists' career. Stent retrieval is different in a transradial approach as compared to a transfemoral approach because of the former's smaller arterial size. In this review, we outline the different stent retrieval techniques with considerations from transradial access.
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Affiliation(s)
- Tak W Kwan
- Beth Israel Medical Center, New York, New York, USA.
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21
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Kwan TW, James D, Huang Y, Liou M, Wong S, Coppola J. Perfection of precise ostial stent placement. J Invasive Cardiol 2012; 24:354-358. [PMID: 22781478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Ostial lesions, including aorta-ostial lesions and Medina 001 bifurcation lesions, are known to create difficulty in precise stent placement. There are many techniques used to help in precise ostial stent placement; these include using multiple angiographic views to assist in placement, the use of the Ostial Pro device, the aorta flowing wire technique, Szabo (anchor-wire) techniques, the T-stent and small protrusion (TAP) technique, the cross-over 1-stent technique, and new dedicated ostial stents. In this review, we summarize these different techniques and show that there is no universal technique that allows for perfect ostial stent placement.
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Affiliation(s)
- Tak W Kwan
- Beth Israel Medical Center, New York, NY, USA.
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Kwan TW, Chen JP, Cherukuri S, Huang Y, Liou M, El Sakr F, Wong S, Coppola J. Transradial Szabo technique for intervention of ostial lesions. J Interv Cardiol 2012; 25:447-51. [PMID: 22672433 DOI: 10.1111/j.1540-8183.2012.00750.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES The aim of our study is to assess the feasibility and safety of transradial intervention (TRI) of coronary ostial lesions using the Szabo technique. BACKGROUND When performing TRI of coronary ostial lesions, precise stent positioning is of paramount importance. TRI has experienced increasing popularity in the U.S.; however, utilization of the Szabo technique has not been systematically evaluated in this setting. We report the results of ostial stent deployment using the Szabo technique for 2 experienced TRI operators and centers. METHODS This was a retrospective analysis of 40 consecutive patients who underwent PCI from April 2009 to September 2011. All patients who underwent PCI via the transradial route with the Szabo technique for ostial lesions performed by experienced transradial operators (>200 cases/yr) were included. RESULTS In our study of 40 patients with 41 coronary ostial lesions, overall procedural success rate was 100%. Stent dislodgement was seen in 1 patient. Clinical follow up was 100%, with a mean duration of 292.7±200 days. Target lesion revascularization (TLR) was seen in 2 patients (5%). One patient had an episode of transient ischemic attack (TIA) at 33 days after PCI; another experienced subacute stent thrombosis at 81 days while on dual antiplatelet therapy. MACE was 7.5% overall. CONCLUSION In our study, treatment of coronary ostial lesions with the Szabo technique via TRI is associated with a high procedural success rate and a low MACE of 7.5%.
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Affiliation(s)
- Tak W Kwan
- Beth Israel Medical Center, New York, New York 10013, USA.
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Kwan TW, Cherukuri S, Huang Y, Pancholy S, Daggubati R, Liou M, Coppola J, Saito S. Feasibility and safety of 7F sheathless guiding catheter during transradial coronary intervention. Catheter Cardiovasc Interv 2012; 80:274-80. [PMID: 22566381 DOI: 10.1002/ccd.24310] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Accepted: 12/27/2011] [Indexed: 11/07/2022]
Abstract
OBJECTIVE The aim of our study is to assess the feasibility, safety, and rate of radial artery occlusion (RAO) using 7F sheathless guiding catheter in a large population undergoing transradial intervention (TRI). BACKGROUND There is a frequent need for large bore guiding catheter to perform complex coronary interventions. Hydrophilic sheathless guiding catheters are not available in the US, therefore, we present the results of a multicenter study using the modified sheathless technique and readily available catheters. METHODS Between December 2010 and February 2011, 116 consecutive patients from four tertiary US centers who underwent TRI using 7F sheathless guiding catheter were included in this study. RESULTS In our study of 116 patients with 123 coronary lesions, 57 stenoses (49%) were complex interventions, which included patients with acute coronary syndromes, chronic total occlusion (CTO), bifurcation stenting, calcified lesions, left main artery, and saphenous venous graft interventions. Overall procedural success rate was 95%. At 7-day, there were six patients (5%) with RAO, of which two of the six had severe radial artery spasm during the procedure. At 30-day, the overall persistent RAO was only detected in three patients (2.5%), as three patients had return of antegrade radial artery flow. CONCLUSIONS In our multicenter study of 116 consecutive patients, using 7F sheathless guiding catheter to perform TRI is associated with a high procedural success (95%) and a low 30-day RAO rate (2.5%).
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Affiliation(s)
- Tak W Kwan
- Division of Cardiology, Beth Israel Medical Center, New York, New York 10013, USA.
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24
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Kwan TW, Ratcliffe JA, Huang Y, Liou M, Pancholy S, Patel TM. Balloon-assisted sheathless transradial intervention (BASTI) using 5 Fr guiding catheters. J Invasive Cardiol 2012; 24:231-233. [PMID: 22562919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND The sheathless approach to transradial percutaneous coronary intervention (PCI) has recently gained popularity among interventionalists. However, technical problems and lack of approved equipment in the United States has limited its applicability. We describe a new approach, balloon-assisted sheathless transradial intervention (BASTI) that can ease the use of 5 Fr sheathless guiding catheters and decrease complication rates. METHODS Twenty-seven consecutive patients undergoing staged elective PCI were enrolled. Radial artery access was obtained using the BASTI method - inflation of a compliant coronary balloon at the tip of the guiding catheter was used to ease the transition of the catheter into the skin. The guidewire and coronary balloon were reused during the PCI. Each of the patients had clinical postprocedure follow-up at radial compression device release, and at 1 day, 7 days, and 30 days. Major adverse cardiac events and access-site complications, including radial artery occlusion (RAO), were documented. RESULTS In this consecutive series, we successfully attempted (27/27) BASTIs. There were no difficulties in obtaining radial artery access with the 5 Fr sheathless guiding catheter. Two patients had balloon rupture during initial radial artery access, but were successfully re-attempted with a higher balloon inflation pressure. All patients then underwent successful coronary intervention. There were no adverse events or procedure-related complications at any time period during follow-up. CONCLUSION BASTI is a feasible alternative to conventional techniques and may reduce vascular access-site complications and patient morbidity in a cost-effective manner.
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Affiliation(s)
- Tak W Kwan
- Department of Cardiology, Beth Israel Medical Center, New York, New York 10003, USA
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Kanei Y, Kwan T, Nakra NC, Liou M, Huang Y, Vales LL, Fox JT, Chen JP, Saito S. Transradial cardiac catheterization: A Review of Access Site Complications. Catheter Cardiovasc Interv 2011; 78:840-6. [DOI: 10.1002/ccd.22978] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2011] [Accepted: 01/08/2011] [Indexed: 11/09/2022]
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Kanei Y, Nakra NC, Liou M, Vales LL, Gowda R, Rosero H, Kwan T, Fox JT. Randomized comparison of transradial coronary angiography via right or left radial artery approaches. Am J Cardiol 2011; 107:195-7. [PMID: 21129711 DOI: 10.1016/j.amjcard.2010.08.065] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2010] [Revised: 08/26/2010] [Accepted: 08/26/2010] [Indexed: 10/18/2022]
Abstract
Previous studies have shown that the right radial approach encounters more tortuosity than the left radial approach during transradial coronary angiography. The objective of this study was to compare the procedural difficulty of the right and left radial approaches in the modern era with dedicated transradial catheters. One hundred ninety-three patients scheduled for transradial coronary angiography with normal Allen test results and without histories of coronary artery bypass grafting were randomized to the right or left radial approach. The choice of catheter was left to the discretion of the operator, with the preferred catheter being a dedicated transradial Optitorque catheter. The primary end point was procedural difficulty, defined as (1) hydrophilic or coronary wire use for tortuosity, (2) stiff wire use for the coronary engagement, (3) multiple catheters used, or (4) nonselective injection. The clinical characteristics were similar between the 2 groups. Procedural success was achieved in 98 of 101 (98%) in the right radial group and 91 of 92 (99%) in the left radial group. Procedural difficulty, fluoroscopy time, and contrast use were similar between the 2 groups. The use of a single catheter was more common in the right radial group (73% vs 18%, p <0.001). In conclusion, procedural success and difficulty were similar in the comparison groups. The right and left radial approaches are feasible and effective to perform coronary angiography and intervention.
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Kwan TW, Vales L, Liou M, Kanei Y, Chen SL. Tips and tricks for stenting of bifurcation coronary lesions. J Invasive Cardiol 2010; 22:440-444. [PMID: 20814053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Although the provisional stenting technique to treat coronary bifurcation lesions is the preferred method, many bifurcation lesions still require a two-stent technique to optimize the result and clinical outcome. This manuscript summarizes the tips and tricks of bifurcation stenting with cases illustrations. As interventionists are encountering more complex and difficult cases, one may find the tips and tricks in this manuscript helpful in daily practice.
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Affiliation(s)
- Tak W Kwan
- Department of Medicine, Division of Cardiology, Beth Israel Medical Center, 16 Street at 1st Avenue, New York, NY 10013, USA.
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Liou M, Kwan TW. Is same-day discharge after elective PCI in the elderly ready for prime time? J Invasive Cardiol 2010; 22:306. [PMID: 20603500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- Michael Liou
- Division of Cardiology, Beth Israel Medical Center, 16 Street at 1st Avenue, New York, NY 10013, USA
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Liou M, Tung F, Kanei Y, Kwan T. Treatment of radial artery pseudoaneurysm using a novel compression device. J Invasive Cardiol 2010; 22:293-295. [PMID: 20516511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Radial artery pseudoaneurysm is an extremely rare complication associated with transradial catheterization. We report 2 cases of pseudoaneurysm of the radial artery that were successfully treated using the Terumo TR band. We believe that the safety, efficiency, speed and minimal invasiveness of this method make it feasible for use as a treatment for peripheral pseudoaneurysm in such patients.
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Affiliation(s)
- Michael Liou
- Divison of Cardiology, Department of Medicine, Beth Israel Medical Center, New York, New York, USA.
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Liou JW, Liou M, Cheng PE, Savostyanov AN, Tsai AC, Liou CY. Strongly Reproducible ERSPs in EEG Experiments. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70554-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Jani S, Liou M, Sibert KA, Stelzer P, Berger M, Hecht SR. Images in cardiovascular medicine. Serial images demonstrating proximal extension of an aortic intramural hematoma. Circulation 2007; 115:e38-40. [PMID: 17242288 DOI: 10.1161/circulationaha.106.653550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Sonal Jani
- Beth Israel Medical Center, University Hospital of the Albert Einstein College of Medicine, New York, NY 10010, USA.
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33
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Shah B, Liou M, Grossi E, Mass H, Lorin JD, Danoff A, Sedlis SP. Relation of elevated periprocedural blood glucose to long-term survival after percutaneous coronary intervention. Am J Cardiol 2005; 96:543-6. [PMID: 16098309 DOI: 10.1016/j.amjcard.2005.04.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2005] [Revised: 04/08/2005] [Accepted: 04/08/2005] [Indexed: 01/15/2023]
Abstract
Strict glycemic control improves outcomes in critically ill patients. We evaluated the hypothesis that strict glycemic control might be similarly beneficial after percutaneous coronary intervention. This study reports the correlation of periprocedural blood glucose with long-term survival in 1,746 patients who underwent percutaneous coronary intervention from 1990 to 2003 in a Department of Veterans Affairs hospital.
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Affiliation(s)
- Binita Shah
- Veterans Affairs New York Harbor Health Care System and New York University School of Medicine, New York, New York, USA
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Huang IJ, Chen CY, Chung HW, Chang DC, Lee CC, Chin SC, Liou M. Time course of cerebral infarction in the middle cerebral arterial territory: deep watershed versus territorial subtypes on diffusion-weighted MR images. Radiology 2001; 221:35-42. [PMID: 11568318 DOI: 10.1148/radiol.2211001412] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To examine possible differences between the evolution of cerebral watershed infarction (WI) and that of territorial thromboembolic infarction (TI) by using diffusion-weighted (DW) and T2-weighted magnetic resonance (MR) images and apparent diffusion coefficient (ADC) maps. MATERIALS AND METHODS Fourteen patients with TI and nine with WI underwent MR imaging from the acute to chronic infarction stages. ADC maps were derived from DW images. Lesion-to-normal tissue signal intensity ratios on ADC maps (rADC), echo-planar T2-weighted images, and DW images were calculated. Lesion volumes at acute or early subacute infarction stages were measured on DW images, and final lesion volumes were estimated on fluid-attenuated inversion-recovery images. RESULTS Analysis of variance revealed a significant difference in temporal evolution patterns of rADC between WI and TI (P <.001). rADC pseudonormalization following TI began about 10 days after symptom onset, but that following WI did not occur until about 1 month after symptom onset. The Pearson correlation coefficient between final and initial infarct volumes was 0.9899 for both infarction subtypes, indicating that the initial ischemic injury volume measured at the acute or early subacute stage predicted the final lesion volume fairly well. CONCLUSION The evolution time of ADC is faster for TI than for WI. This difference, which likely originates from the different pathophysiologic and hemodynamic features of the two infarction types, might account for the relatively large range of ADC values reported for the time course of ischemic strokes.
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Affiliation(s)
- I J Huang
- Department of Electrical Engineering, National Taiwan Univ, Taipei, Taiwan, Republic of China
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Wu TS, Liou M, Lee CJ, Jong TT, McPhail A, McPhail D, Lee KH. Structure and synthesis of murrapanine, a novel skeletal indole-naphthoquinone alkaloid and cytotoxic principal from Murraya paniculata var. omphalocarpa, Tetrahedron Lett., 1989, 30, 6649. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)98784-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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