Background: The Future Revascularization Evaluation in Patients with Diabetes Mellitus: Optimal Management of Multi-Vessel Disease (FREEDOM) clinical trial randomized only a proportion of screened patients with diabetes mellitus (DM) and multi-vessel disease (MVD).
Methods And Results: We determined late rates of death, non-fatal myocardial infarction (MI) and stroke in all 430 patients with DM who had MVD identified on angiographic screening for the FREEDOM Trial, which recruited from June 2006 -March 2010 at Liverpool Hospital, Sydney, Australia. Mortality at 6 years [median] was 23% among 192 FREEDOM-eligible patients and 26% among 238 FREEDOM-ineligible patients, of whom 139 [58%] had prior.
Objectives: The primary aim was to investigate the efficacy and safety of dual antiplatelet therapy (DAPT) using ticagrelor (T-DAPT) versus clopidogrel (C-DAPT) in a real-world ST-elevation myocardial infarction (STEMI) population.
Methods: We retrospectively analyzed 655 consecutive patients having primary percutaneous coronary intervention (PCI) for STEMI at Liverpool Hospital, Sydney, Australia (from January 2013 to April 2016). Medical and procedural therapies were at clinician discretion.
Background: Immediate cardiac catheterisation (CC) is recommended in ST-elevation myocardial infarction (STEMI) following sudden cardiac arrest (SCA). Guidelines advise urgent CC for SCA patients without-STEMI, at clinician discretion. We examined the clinical and angiographic factors predicting mortality in SCA patients having CC.
View Article and Find Full Text PDFInt J Radiat Oncol Biol Phys
September 2017
Purpose: We examined the utility of echocardiographic 2-dimensional speckle tracking strain imaging (SI) for the evaluation of segmental myocardial dysfunction before and after radiation therapy (RT) and the relationship to dose exposure.
Methods And Materials: We prospectively recruited 40 women with left-sided breast cancer, undergoing only adjuvant RT to the left chest. Comparisons of traditional echocardiographic parameters and SI parameters at baseline and 6 weeks after RT were analyzed.
Objectives: We sought to determine the relationship of adverse diastolic remodeling (ie, worsening diastolic or persistent restrictive filling) with infarct scar characteristics, and to evaluate its prognostic value after ST-segment elevation myocardial infarction (STEMI).
Background: Severe diastolic dysfunction (restrictive filling) has known prognostic value post STEMI. However, ongoing left ventricular (LV) remodeling post STEMI may alter diastolic function even if less severe.
Background: Myocardial infarct size (IS) following ST-segment elevation myocardial infarction (STEMI) is an important prognostic factor. We assessed the Selvester 32-point QRS score from the 12-lead ECG for measurement of IS in STEMI patients receiving reperfusion therapy compared to cardiac magnetic resonance imaging (CMRI). Furthermore we sought to explore the impact of microvascular obstruction (MVO) on the scoring system, and determine factors contributing to discrepancies between CMRI IS and Selvester score.
View Article and Find Full Text PDFAims: To determine if high sensitivity troponin T (hs-TnT) measurements performed during the 'plateau phase' of troponin release (≥48 h) following ST-segment elevation myocardial infarction (STEMI) can predict major adverse cardiovascular endpoints (MACE), and to evaluate its prognostic value compared with cardiac magnetic resonance imaging (CMRI) parameters.
Methods And Results: We prospectively recruited 201 first presentation STEMI patients. Serial hs-TnT levels were measured at admission, peak (highest), 24, 48 and 72 h.
Objectives: The aims of this study were to evaluate clinical outcomes following PCI using SeQuent Please paclitaxel-coated balloons (PCB) of ISR and denovo lesions (DNL), in all-comer patients at Liverpool Hospital, Sydney, Australia.
Background: There have been promising results for PCI using drug-coated balloons; however, long-term data for clinical outcomes are lacking.
Methods: Baseline patient demographics, PCI procedural details, and clinical outcomes were collected.
Neuropharmacology
January 2017
The kynurenine pathway of tryptophan metabolism has been implicated in brain function, immunoregulation, anti-microbial mechanisms and pregnancy. Some of these actions are due to depletion of tryptophan and others to the formation of biologically active metabolites. This review focuses on the roles of the kynurenine pathway in host responses during two parasitic diseases of major health and economic importance, malaria and toxoplasmosis, with an emphasis on their impacts on CNS function.
View Article and Find Full Text PDFBackground: Late gadolinium enhancement cardiac magnetic resonance imaging (CMRI) is the current standard for evaluation of myocardial infarct scar size and characteristics. Because post-ST-segment elevation myocardial infarction (STEMI) troponin levels correlate with clinical outcomes, we sought to determine the sampling period for high-sensitivity troponin T (hs-TnT) that would best predict CMRI-measured infarct scar characteristics and left ventricular (LV) function.
Methods And Results: Among 201 patients with first presentation with STEMI who were prospectively recruited, we measured serial hs-TnT levels at admission, peak, 24 hours, 48 hours, and 72 hours after STEMI.
Purpose: To evaluate 2-dimensional strain imaging (SI) for the detection of subclinical myocardial dysfunction during and after radiation therapy (RT).
Methods And Materials: Forty women with left-sided breast cancer, undergoing only adjuvant RT to the left chest, were prospectively recruited. Standard echocardiography and SI were performed at baseline, during RT, and 6 weeks after RT.
Objectives: To investigate the correlation between "target-lesion" SYNTAX score (tSS) and radiation dose (RD) and examine the predictive value of tSS and other variables on RD from percutaneous coronary intervention (PCI).
Background: The complexity of PCI influences procedural RD. The novel tSS was utilized to quantify targeted-PCI complexity.
Background And Objectives: Patients with CKD have increased cardiovascular morbidity and mortality. This study investigated the prognostic value of common clinical echocardiographic parameters.
Design, Setting, Participants, & Measurements: There were 289 unselected consecutive patients who had a transthoracic echocardiogram between January and June 2003.
Background: Chronic kidney disease (CKD) is associated with increased cardiovascular morbidity and mortality; hence detection of early cardiovascular involvement in CKD is important to prevent future adverse cardiovascular events. Left atrial (LA) enlargement and dysfunction has been reported in end stage renal disease. However, there is a paucity of published data regarding the evaluation of LA function in CKD using noninvasive imaging parameters.
View Article and Find Full Text PDFBackground: During percutaneous coronary intervention (PCI) performed in the emergent setting of ST-segment elevation myocardial infarction (STEMI), uncertainty about patients' ability to comply with 12 months dual antiplatelet therapy after drug-eluting stenting is common, and thus, selective bare-metal stent (BMS) deployment could be an attractive strategy if this achieved low target vessel revascularization (TVR) rates in large infarct-related arteries (IRAs) (≥3.5 mm).
Methods And Results: To evaluate this hypothesis, among 1,282 patients with STEMI who underwent PCI during their initial hospitalization, we studied 1,059 patients (83%) who received BMS, of whom 512 (48%) had large IRAs ≥3.
Clinical outcomes in patients with diabetes mellitus and multivessel disease (MVD) undergoing coronary revascularization have not been extensively evaluated, we sought to examine outcomes in a diabetic cohort of 195 consecutive patients with MVD characterized by SYNTAX scores (SSs) undergoing nonrandomized revascularization, 102 (52%) by percutaneous intervention (PCI) and 93 (48%) by coronary artery bypass grafting (CABG) at Liverpool Hospital (Sydney, Australia) from June 2006 to March 2010. Clinical outcomes were assessed at a median term of 14 months. The overall median SS was 44, with significantly higher SSs in CABG- than PCI-treated patients (48 vs 39, p <0.
View Article and Find Full Text PDFThere is little information on whether identification of multi-vessel disease (MVD) in patients with diabetic mellitus (DM) affects risk factor management. From 1125 consecutively screened patients between June 2006 and March 2010, we examined 227 diabetic patients with MVD on coronary angiography. Diabetic control and cholesterol levels were assessed by glycated haemoglobin (HbA1c) and total cholesterol (TC) respectively which were evaluated at baseline and at 1-year follow-up.
View Article and Find Full Text PDFLung complications during malaria infection can range from coughs and impairments in gas transfer to the development of acute respiratory distress syndrome (ARDS). Infecting C57BL/6 mice with Plasmodium berghei K173 strain (PbK) resulted in pulmonary oedema, capillaries congested with leukocytes and infected red blood cells (iRBCs), and leukocyte infiltration into the lungs. This new model of malaria-associated lung pathology, without any accompanying cerebral complications, allows the investigation of mechanisms leading to the lung disease.
View Article and Find Full Text PDFCerebral malaria (CM) is an infrequent but serious complication of Plasmodium falciparum infection in humans. Animal and human studies suggest that the pathogenesis of CM is immune mediated, but the precise mechanisms leading to cerebral pathology are unclear. In mice, infection with Plasmodium berghei ANKA results in CM on day 6 postinoculation (p.
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