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  1. Article ; Online: Correction: Radiation dosimetry and pharmacokinetics of the tau PET tracer florzolotau (18F) in healthy Japanese subjects.

    Miyamoto, Masaomi / Okuyama, Chio / Kagawa, Shinya / Kusano, Kuninori / Takahashi, Masaaki / Takahata, Keisuke / Jang, Ming-Kuei / Yamauchi, Hiroshi

    Annals of nuclear medicine

    2024  Volume 38, Issue 4, Page(s) 328

    Language English
    Publishing date 2024-03-07
    Publishing country Japan
    Document type Published Erratum
    ZDB-ID 1146984-5
    ISSN 1864-6433 ; 0914-7187
    ISSN (online) 1864-6433
    ISSN 0914-7187
    DOI 10.1007/s12149-024-01917-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Serum myostatin at dialysis initiation may predict 1-year mortality and hospitalization.

    Sakashita, Midori / Hamasaki, Yoshifumi / Oki, Rikako / Komaru, Yohei / Miyamoto, Yoshihisa / Yoshida, Teruhiko / Matsuura, Ryo / Doi, Kent / Nangaku, Masaomi

    Nephron

    2024  

    Abstract: Objective: Myostatin, which is known as a negative skeleton muscle regulator, is associated with mortality in maintenance hemodialysis patients. However, the significance of serum myostatin concentrations at dialysis initiation has not been established. ...

    Abstract Objective: Myostatin, which is known as a negative skeleton muscle regulator, is associated with mortality in maintenance hemodialysis patients. However, the significance of serum myostatin concentrations at dialysis initiation has not been established. We investigated the relation between serum myostatin concentrations and mortality or hospitalization within one year in incident dialysis patients.
    Methods: After a patient initiating hemodialysis or peritoneal dialysis during 2016-2018 was enrolled, the patient's serum myostatin at dialysis initiation was measured. Composite outcomes comprising mortality and hospitalization within 1 year after dialysis initiation were compared between two groups divided according to myostatin levels. The Cox proportional hazards model was used to assess significant relations between myostatin and outcomes.
    Results: This study examined 104 incident dialysis patients with mean age of 65.5±14.0 (68% male). Kaplan-Meier analyses indicated the 1-year hospitalization-free and survival rate as significantly lower in the lower myostatin group than in the higher myostatin group (p = .0020). Cox proportional hazards regression analyses revealed that the value of myostatin logarithm at dialysis initiation was inversely associated with the occurrence of a composite outcome, independently of age (hazard ratio 0.16, 95% confidence interval 0.05-0.57). Receiver operating characteristic (ROC) analysis showed the area under the curve of serum myostatin for predicting death or hospitalization within 1 year as higher than those of clinical indices of nutritional disturbance and frailty.
    Conclusion: Serum myostatin concentration at dialysis initiation is inversely associated with adverse outcomes in these dialysis-initiated patients.
    Language English
    Publishing date 2024-03-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 207121-6
    ISSN 2235-3186 ; 1423-0186 ; 1660-8151 ; 0028-2766
    ISSN (online) 2235-3186 ; 1423-0186
    ISSN 1660-8151 ; 0028-2766
    DOI 10.1159/000538533
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Solute Clearance Evaluation and Filter Clotting Prediction in Continuous Renal Replacement Therapy.

    Yoshimoto, Kohei / Matsuura, Ryo / Komaru, Yohei / Yoshida, Teruhiko / Miyamoto, Yoshihisa / Hamasaki, Yoshifumi / Inokuchi, Ryota / Nangaku, Masaomi / Doi, Kent

    Journal of clinical medicine

    2023  Volume 12, Issue 24

    Abstract: Unexpected filter clotting is a major problem in continuous renal replacement therapy (CRRT). Reduced solute clearance is observed prior to filter clotting. This single-center, retrospective, observational study aimed to determine whether reduced solute ... ...

    Abstract Unexpected filter clotting is a major problem in continuous renal replacement therapy (CRRT). Reduced solute clearance is observed prior to filter clotting. This single-center, retrospective, observational study aimed to determine whether reduced solute clearance of low- and medium-molecular-weight molecules in CRRT can predict filter clotting. Solute clearances of urea and myoglobin (Mb) were measured at 24 h after initiation of continuous hemodiafiltration (CHDF). Clearance per flow (CL/F) was calculated. The primary outcome was clotting of the filter in the subsequent 24 h, and 775 CHDF treatments conducted on 230 patients for at least 24 consecutive hours in our ICU were analyzed. Filter clotting was observed in 127 treatments involving 39 patients. Urea and Mb CL/F at 24 h were significantly lower in the patients who experienced clotting. Further analysis was limited to the first CHDF treatment of each patient to adjust for confounding factors. Multivariate logistic regression analysis revealed that both urea CL/F < 94% and Mb CL/F < 64% were significant predictors of clotting within the next 24 h. Lower urea and Mb CL/F measured at 24 h after CRRT initiation were associated with filter clotting in the next 24 h. Further study is necessary to ascertain whether measurement of urea and MB CL/F will help with avoiding unexpected filter clotting.
    Language English
    Publishing date 2023-12-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12247703
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: HMGB1 Is a Prognostic Factor for Mortality in Acute Kidney Injury Requiring Renal Replacement Therapy.

    Matsuura, Ryo / Komaru, Yohei / Miyamoto, Yoshihisa / Yoshida, Teruhiko / Yoshimoto, Kohei / Yamashita, Tetsushi / Hamasaki, Yoshifumi / Noiri, Eisei / Nangaku, Masaomi / Doi, Kent

    Blood purification

    2023  Volume 52, Issue 7-8, Page(s) 660–667

    Abstract: Instruction: High mobility group box 1 (HMGB1) is a pro-inflammatory cytokine that reportedly causes kidney injury and other organ damage in rodent acute kidney injury (AKI) models. However, it remains unclear whether HMGB1 is associated with clinical ... ...

    Abstract Instruction: High mobility group box 1 (HMGB1) is a pro-inflammatory cytokine that reportedly causes kidney injury and other organ damage in rodent acute kidney injury (AKI) models. However, it remains unclear whether HMGB1 is associated with clinical AKI and related outcomes. This study aimed to evaluate the association with HMGB1 and prognosis of AKI requiring continuous renal replacement therapy (CRRT).
    Methods: AKI patients treated with CRRT in our intensive care unit were enrolled consecutively during 2013-2016. Plasma HMGB1 was measured on initiation. Classic initiation was defined as presenting at least one of the following conventional indications: hyperkalemia (K ≥6.5 mEq/L), severe acidosis (pH <7.15), uremia (UN >100 mg/dL), and diuretics-resistant pulmonary edema. Early initiation was defined as presenting no conventional indications. The primary outcome was defined as 90-day mortality.
    Results: A total of 177 AKI patients were enrolled in this study. HMGB1 was significantly associated with the primary outcome (hazard ratio, 1.06; 95% CI, 1.04-1.08). When the patients were divided into two-by-two groups by the timing of CRRT initiation and the HMBG1 cutoff value obtained by receiver operating curve (ROC) analysis, the high HMGB1 group (>10 ng/mL) with classic initiation was significantly associated with the primary outcome compared with the others, even after adjusting for other factors including the nonrenal serial organ failure assessment (SOFA) score.
    Conclusion: HMGB1 was associated with 90-day mortality in AKI patients requiring CRRT. Notably, the highest mortality was observed in the high HMGB1 group with classic initiation. These findings suggest that CRRT should be considered for AKI patients with high HMGB1, regardless of the conventional indications.
    MeSH term(s) Humans ; Continuous Renal Replacement Therapy ; Prognosis ; HMGB1 Protein ; Renal Replacement Therapy ; Intensive Care Units ; Acute Kidney Injury ; Retrospective Studies
    Chemical Substances HMGB1 Protein
    Language English
    Publishing date 2023-06-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 605548-5
    ISSN 1421-9735 ; 0253-5068
    ISSN (online) 1421-9735
    ISSN 0253-5068
    DOI 10.1159/000530774
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Different Roles of Functional and Structural Renal Markers Measured at Discontinuation of Renal Replacement Therapy for Acute Kidney Injury.

    Yoshida, Teruhiko / Matsuura, Ryo / Komaru, Yohei / Miyamoto, Yoshihisa / Yoshimoto, Kohei / Hamasaki, Yoshifumi / Noiri, Eisei / Nangaku, Masaomi / Doi, Kent

    Blood purification

    2023  Volume 52, Issue 9-10, Page(s) 786–792

    Abstract: Introduction: Severe acute kidney injury (AKI) requiring renal replacement therapy (RRT) has been associated with an unacceptably high mortality of 50% or more. Successful discontinuation of RRT is thought to be linked to better outcomes. Although ... ...

    Abstract Introduction: Severe acute kidney injury (AKI) requiring renal replacement therapy (RRT) has been associated with an unacceptably high mortality of 50% or more. Successful discontinuation of RRT is thought to be linked to better outcomes. Although functional and structural renal markers have been evaluated in AKI, little is known about their roles in predicting outcomes at the time of RRT discontinuation.
    Methods: In this prospective single-center cohort study, we analyzed patients who received continuous RRT (CRRT) for AKI between August 2016 and March 2018 in the intensive care unit of the University of Tokyo Hospital (Tokyo, Japan). Clinical parameters and urine samples were obtained at CRRT discontinuation. Successful CRRT discontinuation was defined as neither resuming CRRT for 48 h nor receiving intermittent hemodialysis for 7 days from the CRRT termination. Major adverse kidney events (MAKEs) were defined as death, requirement for dialysis, or a decrease in the estimated glomerular filtration rate (eGFR) of more than 25% from the baseline at day 90.
    Results: Of 73 patients, who received CRRT for AKI, 59 successfully discontinued CRRT and 14 could not. Kinetic eGFR, urine volume, urinary neutrophil gelatinase-associated lipocalin (NGAL), and urinary L-type fatty acid binding protein were predictive for CRRT discontinuation. Of these factors, urine volume had the highest area under the curve (AUC) 0.91 with 95% confidence interval [0.80-0.96] for successful CRRT discontinuation. For predicting MAKEs at day 90, the urinary NGAL showed the highest AUC 0.76 [0.62-0.86], whereas kinetic eGFR and urine volume failed to show statistical significance (AUC 0.49 [0.35-0.63] and AUC 0.59 [0.44-0.73], respectively).
    Conclusions: Our prospective study confirmed that urine volume, a functional renal marker, predicted successful discontinuation of RRT and that urinary NGAL, a structural renal marker, predicted long-term renal outcomes. These observations suggest that the functional and structural renal makers play different roles in predicting the outcomes of severe AKI requiring RRT.
    MeSH term(s) Humans ; Continuous Renal Replacement Therapy/adverse effects ; Lipocalin-2/urine ; Prospective Studies ; Cohort Studies ; Renal Dialysis ; Biomarkers/urine ; Renal Replacement Therapy/adverse effects ; Acute Kidney Injury ; Kidney/metabolism
    Chemical Substances Lipocalin-2 ; Biomarkers
    Language English
    Publishing date 2023-09-27
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 605548-5
    ISSN 1421-9735 ; 0253-5068
    ISSN (online) 1421-9735
    ISSN 0253-5068
    DOI 10.1159/000532034
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Radiation dosimetry and pharmacokinetics of the tau PET tracer florzolotau (18F) in healthy Japanese subjects.

    Miyamoto, Masaomi / Okuyama, Chio / Kagawa, Shinya / Kusano, Kuninori / Takahashi, Masaaki / Takahata, Keisuke / Jang, Ming-Kuei / Yamauchi, Hiroshi

    Annals of nuclear medicine

    2023  Volume 37, Issue 5, Page(s) 300–309

    Abstract: Objective: Abnormal aggregation of tau in the brain is a major contributing factor in various neurodegenerative diseases. Florzolotau (18F) (florzolotau, APN-1607, PM-PBB3) has been shown to be a probe for tau fibrils in an animal model and patients ... ...

    Abstract Objective: Abnormal aggregation of tau in the brain is a major contributing factor in various neurodegenerative diseases. Florzolotau (18F) (florzolotau, APN-1607, PM-PBB3) has been shown to be a probe for tau fibrils in an animal model and patients with Alzheimer's disease and those with non-Alzheimer's disease tauopathies. The objective of this study is to evaluate the safety, pharmacokinetics, and radiation dose following a single intravenous administration of florzolotau in healthy Japanese subjects.
    Methods: Three healthy male Japanese subjects aged between 20 and 64 were enrolled in this study. Subjects were determined to be eligible based on the screening assessments at the study site. Subjects received a single intravenous dose of 195.0 ± 0.5 MBq of florzolotau and underwent the whole-body PET scan 10 times in total to calculate absorbed doses to major organs/tissues and effective dose. Radioactivities in whole blood and urine were also measured for pharmacokinetic evaluation. Absorbed doses to major organs/tissues and effective dose were estimated using the medical internal radiation dose (MIRD) method. Vital signs, electrocardiography (ECG), and blood tests were done for safety evaluation.
    Results: The intravenous injection of florzolotau was well tolerated. There were no adverse events or clinically detectable pharmacologic effects related to the tracer in any subjects. No significant changes in vital signs and ECG were observed. The highest mean initial uptake at 15 min after injection was in the liver (29.0 ± 4.0%ID), intestine (4.69 ± 1.65%ID), and brain (2.13 ± 0.18%ID). The highest absorbed dose was 508 μGy/MBq of the gallbladder wall, followed by the liver of 79.4 μGy/MBq, the pancreas of 42.5 μGy/MBq, and the upper large intestine of 34.2 μGy/MBq. The effective dose was calculated as 19.7 μSv/MBq according to the tissue weighting factor reported by ICRP-103.
    Conclusion: Florzolotau intravenous injection was well tolerated in healthy male Japanese subjects. The effective dose was determined as 3.61 mSv when 185 MBq florzolotau was given.
    MeSH term(s) Humans ; Male ; East Asian People ; Positron-Emission Tomography/methods ; Radiometry ; Radiopharmaceuticals/pharmacokinetics ; Tissue Distribution ; Young Adult ; Adult ; Middle Aged
    Chemical Substances Radiopharmaceuticals
    Language English
    Publishing date 2023-03-09
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1146984-5
    ISSN 1864-6433 ; 0914-7187
    ISSN (online) 1864-6433
    ISSN 0914-7187
    DOI 10.1007/s12149-023-01828-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Solute Clearance Evaluation and Filter Clotting Prediction in Continuous Renal Replacement Therapy

    Kohei Yoshimoto / Ryo Matsuura / Yohei Komaru / Teruhiko Yoshida / Yoshihisa Miyamoto / Yoshifumi Hamasaki / Ryota Inokuchi / Masaomi Nangaku / Kent Doi

    Journal of Clinical Medicine, Vol 12, Iss 24, p

    2023  Volume 7703

    Abstract: Unexpected filter clotting is a major problem in continuous renal replacement therapy (CRRT). Reduced solute clearance is observed prior to filter clotting. This single-center, retrospective, observational study aimed to determine whether reduced solute ... ...

    Abstract Unexpected filter clotting is a major problem in continuous renal replacement therapy (CRRT). Reduced solute clearance is observed prior to filter clotting. This single-center, retrospective, observational study aimed to determine whether reduced solute clearance of low- and medium-molecular-weight molecules in CRRT can predict filter clotting. Solute clearances of urea and myoglobin (Mb) were measured at 24 h after initiation of continuous hemodiafiltration (CHDF). Clearance per flow (CL/F) was calculated. The primary outcome was clotting of the filter in the subsequent 24 h, and 775 CHDF treatments conducted on 230 patients for at least 24 consecutive hours in our ICU were analyzed. Filter clotting was observed in 127 treatments involving 39 patients. Urea and Mb CL/F at 24 h were significantly lower in the patients who experienced clotting. Further analysis was limited to the first CHDF treatment of each patient to adjust for confounding factors. Multivariate logistic regression analysis revealed that both urea CL/F < 94% and Mb CL/F < 64% were significant predictors of clotting within the next 24 h. Lower urea and Mb CL/F measured at 24 h after CRRT initiation were associated with filter clotting in the next 24 h. Further study is necessary to ascertain whether measurement of urea and MB CL/F will help with avoiding unexpected filter clotting.
    Keywords clearance ; urea ; myoglobin ; clotting ; filter ; continuous hemodiafiltration ; Medicine ; R
    Language English
    Publishing date 2023-12-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article: [A novel therapeutic drug: ramelteon].

    Miyamoto, Masaomi

    Nihon rinsho. Japanese journal of clinical medicine

    2009  Volume 67, Issue 8, Page(s) 1595–1600

    Abstract: Current treatment of insomnia with hypnotics, GABA(A) receptor modulators, induces various side effects, including cognitive impairment, motor disturbance, dependence, tolerance, hang-over, and rebound insomnia. Ramelteon (Rozerem) is an orally active, ... ...

    Abstract Current treatment of insomnia with hypnotics, GABA(A) receptor modulators, induces various side effects, including cognitive impairment, motor disturbance, dependence, tolerance, hang-over, and rebound insomnia. Ramelteon (Rozerem) is an orally active, highly selective melatonin MT1/MT2 receptor agonist. Unlike the sedative hypnotics that target GABA(A) receptor complexes, ramelteon is a chronohypnotic that acts on the melatonin MT1 and MT2 receptors, which are primarily located in the suprachiasmatic nucleus. Ramelteon has demonstrated sleep-promoting effects in clinical trials, and coupled with its favorable safety profile and lack of abuse potential or dependence, this chronohypnotic provides an important treatment option for insomnia.
    MeSH term(s) Humans ; Indenes/therapeutic use ; Receptor, Melatonin, MT1/agonists ; Receptor, Melatonin, MT2/agonists ; Sleep Initiation and Maintenance Disorders/drug therapy
    Chemical Substances Indenes ; Receptor, Melatonin, MT1 ; Receptor, Melatonin, MT2 ; ramelteon (901AS54I69)
    Language Japanese
    Publishing date 2009-08
    Publishing country Japan
    Document type English Abstract ; Journal Article ; Review
    ZDB-ID 390903-7
    ISSN 0047-1852
    ISSN 0047-1852
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Pharmacology of ramelteon, a selective MT1/MT2 receptor agonist: a novel therapeutic drug for sleep disorders.

    Miyamoto, Masaomi

    CNS neuroscience & therapeutics

    2009  Volume 15, Issue 1, Page(s) 32–51

    Abstract: An estimated one-third of the general population is affected by insomnia, and this number is increasing due to more stressful working conditions and the progressive aging of society. However, current treatment of insomnia with hypnotics, gamma- ... ...

    Abstract An estimated one-third of the general population is affected by insomnia, and this number is increasing due to more stressful working conditions and the progressive aging of society. However, current treatment of insomnia with hypnotics, gamma-aminobutyric acid A (GABA(A)) receptor modulators, induces various side effects, including cognitive impairment, motor disturbance, dependence, tolerance, hangover, and rebound insomnia. Ramelteon (Rozerem; Takeda Pharmaceutical Company Limited, Osaka, Japan) is an orally active, highly selective melatonin MT(1)/MT(2) receptor agonist. Unlike the sedative hypnotics that target GABA(A) receptor complexes, ramelteon is a chronohypnotic that acts on the melatonin MT(1) and MT(2) receptors, which are primarily located in the suprachiasmatic nucleus, the body's "master clock." As such, ramelteon possesses the first new therapeutic mechanism of action for a prescription insomnia medication in over three decades. Ramelteon has demonstrated sleep-promoting effects in clinical trials, and coupled with its favorable safety profile and lack of abuse potential or dependence, this chronohypnotic provides an important treatment option for insomnia.
    MeSH term(s) Animals ; Circadian Rhythm/drug effects ; Electroencephalography/drug effects ; Humans ; Indenes/adverse effects ; Indenes/metabolism ; Indenes/pharmacology ; Indenes/therapeutic use ; Learning/drug effects ; Memory/drug effects ; Receptor, Melatonin, MT1/agonists ; Receptor, Melatonin, MT2/agonists ; Reward ; Sleep Wake Disorders/drug therapy ; Substance-Related Disorders/etiology
    Chemical Substances Indenes ; Receptor, Melatonin, MT1 ; Receptor, Melatonin, MT2 ; ramelteon (901AS54I69)
    Language English
    Publishing date 2009-03-04
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2423461-8
    ISSN 1755-5949 ; 1755-5930
    ISSN (online) 1755-5949
    ISSN 1755-5930
    DOI 10.1111/j.1755-5949.2008.00066.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Postoperative outcomes of cancer surgery in patients with and without kidney failure with dialysis therapy: a matched-pair cohort study.

    Miyamoto, Yoshihisa / Iwagami, Masao / Aso, Shotaro / Uda, Kazuaki / Fushimi, Kiyohide / Hamasaki, Yoshifumi / Nangaku, Masaomi / Yasunaga, Hideo / Doi, Kent

    Clinical kidney journal

    2022  Volume 15, Issue 6, Page(s) 1137–1143

    Abstract: Background: The difference in outcomes of cancer surgery between patients with and without kidney failure with dialysis therapy (KFDT) remains uncertain.: Methods: Using 2010-18 data in a national inpatient database in Japan, we identified patients ... ...

    Abstract Background: The difference in outcomes of cancer surgery between patients with and without kidney failure with dialysis therapy (KFDT) remains uncertain.
    Methods: Using 2010-18 data in a national inpatient database in Japan, we identified patients who had undergone resection of colorectal, lung, gastric or breast cancer. We matched selected patient characteristics, type of cancer, surgical procedure and hospital of up to four patients without KFDT to each patient with KFDT. We assessed 30-day mortality and postoperative complications.
    Results: Through matching, we identified 2248 patients with KFDT (807 with colorectal, 579 with lung, 500 with gastric and 362 with breast cancer) and 8210 patients without KFDT (2851 with colorectal, 2216 with lung, 1756 with gastric and 1387 with breast cancer). Postoperative complications occurred in a higher proportion of patients with KFDT than of those without KFDT after colorectal {20.3% versus 14.6%; risk difference (RD): 5.7% [95% confidence interval (95% CI) 2.6%-8.8%]}, lung [18.0% versus 12.9%; RD: 5.1% (95% CI 1.6%-8.4%)], gastric [25.0% versus 13.2%; RD: 11.8% (95% CI 7.6%-16.2%)] and breast cancer surgery [7.5% versus 3.5%; RD: 3.9% (95% CI 1.1%-6.9%)]. Patients with KFDT had a higher 30-day mortality than those without KFDT after gastric cancer surgery [1.6% versus 0.3%; RD: 1.3% (95% CI 0.1%-2.3%)]. Heart failure and ischemic heart disease occurred more frequently in patients with KFDT.
    Conclusions: Patients with KFDT had higher rates of postoperative complications and 30-day mortality; however, RDs varied between cancer types. The higher rates of postoperative complications in patients with KFDT were mainly attributable to cardiovascular complications.
    Language English
    Publishing date 2022-01-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2655800-2
    ISSN 2048-8513 ; 2048-8505
    ISSN (online) 2048-8513
    ISSN 2048-8505
    DOI 10.1093/ckj/sfac005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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