William Kemp

Dr. William Kemp

orcid

Research Focus & Metrics

Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 September 2021 in Journal of Hepatology
Verified
Journal Article
Closed access
GOGeraldine J. Ooi
Geraldine J. Ooi
Peter MeiklePeter Meikle
Peter Meikle
KHKevin Huynh
Kevin Huynh
AEArul Earnest
Arul Earnest
SRStuart Keith Roberts
Stuart Keith Roberts
MWMatthew J. Watt
Matthew J. Watt

1 June 2013 in Technology in Cancer Research & Treatment
Verified
Journal Article
Open access
WCW. Cheung
W. Cheung
HKHelen Kavnoudias
Helen Kavnoudias
SRS. Roberts
S. Roberts
BSB. Szkandera
B. Szkandera
WKWilliam Kemp
William Kemp
KTK. R. Thomson
K. R. Thomson
The aims of this study were to evaluate the safety, feasibility and tumour response of irreversible electroporation, a non-thermal ablation technique, for the treatment of unresectable hepatocellular carcinoma. The endpoints were safety and local treatment efficacy. Patients with unresectable tumours and tumours not amenable for radiofrequency ablation because of their vicinity to organs vulnerable to thermal damage such as the bowel or because they were close to large blood vessels that would limit efficacy of ablation due to the heat sink effect were treated with irreversible electroporation using percutaneous ultrasound and/or computed tomography guided electrode placement between November 2008 and December 2009. Early, late, minor and major complications were recorded. Tumour response was determined on triphasic helical computed tomography follow-up at one month, then every three months post-procedure. Eleven patients received IRE therapy to 18 HCC lesions (Mean diameter 2.44 ± 0.99 cm; range 1.0–6.1 cm) with five patients having more than one treated HCC. Mean follow-up was 18 months (range 14–24 months). Six patients required repeat treatments for local residual or recurrent disease; two of these also had IRE for distant intrahepatic recurrence. No serious complications were observed despite seven lesions lying adjacent to important structures or organs. Four patients developed transient urinary retention and seven developed transient local post-procedure pain. After IRE therapy, 13 (72%) lesions were completely ablated with 93% success for lesions <3 cm (13/14). The local recurrence-free period was 18 ± 4 months and the distance recurrence free period was 14 ± 6 months. These preliminary results suggest that IRE is a safe and feasible technique for local ablation of HCC, particularly for lesions less than 3 cm. No major complications were encountered during this study even for tumours close to essential structures or organs.

1 June 2012 in European Journal of Heart Failure
Verified
Journal Article
Open access
PDF file
IHIngrid Hopper
Ingrid Hopper
WKWilliam Kemp
William Kemp
PPPornwalee Porapakkham
Pornwalee Porapakkham
YSYusuke Sata
Yusuke Sata
ECEilis Condon
Eilis Condon
HKHenry Krum
Henry Krum
Aim The impact of cardiac dysfunction on the liver is known as cardiac hepatopathy. In certain instances this can result in significant hepatic fibrosis or cirrhosis. The validity of non‐invasive tools to assess hepatic fibrosis, such as FibroScan® which measures liver stiffness (LSM), has not been established in this setting. We examined the impact of cardiac dysfunction on LSM using FibroScan® and the influence of volume changes on LSM. Methods and results A prospective, cross‐sectional study examined the use of FibroScan® in subjects with left‐sided heart failure (LHF, n = 32), right‐sided heart failure (RHF, n = 9), and acute decompensated heart failure (ADHF, n = 8). The impact of volume changes upon LSM was further examined in the ADHF group (pre‐ and post‐diuresis) and in a haemodialysis group (HD, n = 12), pre‐ and post‐ultrafiltration on dialysis. Compared with healthy controls [n = 55, LSM = median 4.4 (25th percentile 3.6, 75th percentile 5.1) kPa], LSM was increased in all the cardiac dysfunction subgroups [LHF, 4.7 (4.0, 8.7) kPa, P = 0.04; RHF, 9.7 (5.0, 10.8) kPa, P < 0.001; ADHF, 11.2 (6.7, 14.3) kPa, P < 0.001]. Alteration in volume status via diuresis did not change the baseline LSM in ADHF [11.2 (6.7, 14.3) to 9.5 (7.3, 21.6) kPa, P > 0.05] with mean diuresis 5051 ± 1585 mL, or ultrafiltration in HD [6.0 (3.6, 5.1) vs. 5.7 (4.8, 7.0) kPa, P > 0.05] with mean diuresis 1962 ± 233 mL. Conclusion Our findings support the concept of increased LSM in the cardiac failure population. LSM was not altered to a statistically significant level with acute volume changes.

1 November 2021 in Journal of Hepatology
Verified
Journal Article
Closed access
DCDaniel Clayton-Chubb
Daniel Clayton-Chubb
DSDaniel Schneider
Daniel Schneider
EFElliot Freeman
Elliot Freeman
WKWilliam Kemp
William Kemp
SRStuart Keith Roberts
Stuart Keith Roberts

4 September 2018 in Alimentary Pharmacology & Therapeutics
Verified
Journal Article
Open access
PDF file
RBRiley Batchelor
Riley Batchelor
RKRadya Kumar
Radya Kumar
JGJulia F. M. Gilmartin‐Thomas
Julia F. M. Gilmartin‐Thomas
IHIngrid Hopper
Ingrid Hopper
WKWilliam Kemp
William Kemp
DLDanny Liew
Danny Liew
Summary: Background: Clopidogrel's anti‐platelet effects may be attenuated by a pharmacokinetic interaction with co‐prescribed proton pump inhibitors, which inhibit oxidative pathways that convert clopidogrel into its active metabolites. Despite this, the impact of PPIs on cardiovascular risk in the absence of clopidogrel is not well defined.Aim: To report on a systematic review and meta‐analysis of the association between PPIs and cardiovascular risk, independent of clopidogrel.Methods: The databases of MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, Scopus, Web of Science, and ClinicalTrials.gov were systematically searched in October 2017. The primary outcome was association between PPI monotherapy and any adverse cardiovascular event. The secondary outcome was association between proton pump inhibitor monotherapy and acute myocardial infarction. Studies were excluded if they reported or did not adjust for concomitant anti‐platelet therapy or involved participants aged less than 18 years.Results: A total of 22 studies were included in the systematic review. Data from 16 studies were included in the meta‐analysis (involving 447 408 participants). Of these, eight were randomised controlled trials, seven were observational studies and one was a retrospective analysis of a randomised controlled trial. An increased risk of any adverse cardiovascular event with PPI monotherapy was observed using pooled data from observational studies (risk ratio 1.25, 95% CI 1.11‐1.42, I2 81%, P < 0.001), but not from randomised controlled trials (risk ratio 0.89, 95% CI 0.34‐2.33, I2 0%, P = 0.85).Conclusion: There is no clear evidence of an association between PPI monotherapy and increased cardiovascular risk.

12 September 2023 in Liver International
Verified
Journal Article
Open access
DCDaniel Clayton-Chubb
Daniel Clayton-Chubb
WKWilliam Kemp
William Kemp
AMAmmar Majeed
Ammar Majeed
JLJohn S. Lubel
John S. Lubel
RWRobyn L. Woods
Robyn L. Woods
SRStuart Keith Roberts
Stuart Keith Roberts
Background & Aims: The burden of metabolic dysfunction‐associated steatotic liver disease (MASLD) is growing rapidly, as is the number of older adults globally. However, relatively few studies have been performed evaluating the prevalence and risk factors for MASLD in older adults. As such, we aimed to identify the prevalence of MASLD in older adults, as well as sociodemographic, clinical, functional and biochemical associations.Methods: The study population included older adults without a history of cardiovascular disease, dementia or independence‐limiting functional impairment who had participated in the ASPirin in Reducing Events in the Elderly (ASPREE) randomised trial. MASLD was defined using the Fatty Liver Index (FLI). Associations were identified using Poisson regression with robust variance for FLI ≥ 60 vs FLI < 30.Results: 9097 Australian participants aged ≥70 years had complete biochemical and anthropometric data to identify MASLD. The study population had a mean age of 75.1 ± 4.3 years and was 45.0% male. Almost one‐third (33.0%) had prevalent MASLD, and the prevalence decreased with increasing age (adjusted RR [aRR] 0.96, 95% CI: 0.96–0.97). MASLD was also negatively associated with social advantage (aRR 0.94, 95% CI: 0.90–0.99) and exercise tolerance and was positively associated with diabetes mellitus (aRR: 1.22, 95% CI: 1.16–1.29), hypertension (aRR: 1.31, 95% CI: 1.22–1.41), male sex (aRR: 1.66, 95% CI: 1.57–1.74), pre‐frailty (aRR: 1.99, 95% CI: 1.82–2.12) and frailty (aRR: 2.36, 95% CI: 2.16–2.56). MASLD and nonalcoholic fatty liver disease (NAFLD) results were 100% concordant.Conclusion: This study in a large cohort of relatively healthy community‐dwelling older adults shows that MASLD is common, decreases with age and is associated with poorer metabolic health, social disadvantage and frailty.