Publications by authors named "ZP Ding"

Article Synopsis
  • * Conducted on 122 patients with moderate to severe aortic stenosis, the research identified specific circulating proteins that correlate with higher risks of heart failure, severe symptoms, and mortality.
  • * Key proteins linked to inflammation and immune responses were significantly associated with worse outcomes, particularly in patients showing reduced heart strain, suggesting new avenues for assessing patient risk beyond standard imaging methods.
View Article and Find Full Text PDF

Photo-responsive adsorption has emerged as a vibrant area because it provides a promising route to reduce the energy consumption of the traditional adsorption separation. However, the current methodology to fabricate photo-responsive sorbents is still subject to the photo-deforming molecular units. In this study, a new initiative of photo-dissociated electron-hole pairs is proposed to generate amazing adsorption activity, and prove its feasibility.

View Article and Find Full Text PDF

Patients with EGFR-mutated non-small cell lung cancer (NSCLC) respond poorly to immune checkpoint inhibitors (ICIs). It has been reported that the number of CD8T cells is reduced in EGFR-mutated NSCLC. However, the extent of heterogeneity and effector function of distinct populations of CD8T cells has not been investigated intensively.

View Article and Find Full Text PDF

Background: Despite promising overall survival of stage I lung adenocarcinoma (LUAD) patients, 10-25 % of them still went through recurrence after surgery. [1] While it is still disputable whether adjuvant chemotherapy is necessary for stage I patients. [2] IASLC grading system for non-mucinous LUAD shows that minor high-grade patterns are significant indicator of poor prognosis.

View Article and Find Full Text PDF

Introduction: Messenger ribonucleic acid (mRNA) severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines have been associated with myocarditis/pericarditis, especially in young males. We evaluated the risk of myocarditis/pericarditis following mRNA vaccines by brand, age, sex and dose number in Singapore.

Methods: Adverse event reports of myocarditis/pericarditis following mRNA vaccines received by the Health Sciences Authority from 30 December 2020 to 25 July 2022 were included, with a data lock on 30 September 2022.

View Article and Find Full Text PDF
Article Synopsis
  • A meta-analysis was conducted to compare clinical outcomes between left atrial appendage closure (LAAC) and direct oral anticoagulants (DOACs) in patients with atrial fibrillation, examining various cardiovascular events and mortality rates.
  • The analysis included 7 studies with over 8,900 patients, showing that LAAC was linked to lower rates of major adverse cardiovascular events, all-cause mortality, and cardiovascular mortality compared to DOACs after an average follow-up of 22 months.
  • However, there were no significant differences in ischemic stroke, systemic embolism, major bleeding, or hemorrhagic stroke rates between the two groups, suggesting that LAAC could be an effective alternative for stroke prevention in these patients
View Article and Find Full Text PDF
Article Synopsis
  • * A study analyzed almost 25,000 patients who had multiple echocardiograms, revealing that the average expansion rate of the thoracic aorta is less than 2 mm per decade.
  • * Younger males with larger aortas showed faster expansion rates, which could influence future management strategies for aortic health.
View Article and Find Full Text PDF

Background: Recent data showed poor long-term survival in patients with moderate AS. Although sex differences in left ventricular (LV) remodeling and outcome are well described in severe AS, it has not been evaluated in moderate AS.

Methods: In this retrospective, multicenter study, patients with a first diagnosis of moderate AS diagnosed between 2001 and 2019 were identified.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the relationship between atrial fibrillation (AF) and aortic stenosis (AS), two common heart conditions that often occur together, focusing on their impact on patient mortality while considering left ventricular (LV) diastolic function.
  • Out of 2849 patients with significant AS, 24.1% had a history of AF, and after a median follow-up of 60 months, the ten-year mortality rate was significantly higher in patients with AF (46.8%) compared to those with normal sinus rhythm (36.8%).
  • Despite the initial findings linking AF to higher mortality, when adjusting for factors related to LV diastolic function, AF was not seen as
View Article and Find Full Text PDF
Article Synopsis
  • * Using speckle-tracking echocardiography, researchers measured three types of LA strain and tracked patient outcomes over an average of 2.7 years, finding that lower strain values correlated with worse clinical results.
  • * LA strain metrics (particularly LASr < 20%) demonstrated superior prognostic value compared to traditional echocardiographic variables and were strongly linked to adverse outcomes like heart failure hospitalizations and mortality.
View Article and Find Full Text PDF

The rate of aortic stenosis (AS) progression in patients with moderate AS is unclear. This study examined the risk factors of progression from moderate to severe AS and its impact on clinical outcomes. A total of 954 patients with moderate AS (valve area >1.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigated the prevalence and prognostic implications of different flow-gradient patterns in patients with moderate aortic stenosis (AS), highlighting a gap in knowledge about their outcomes.
  • Among 1,974 patients analyzed, 40% exhibited discordant grading, which correlated with significantly higher mortality rates compared to those with concordant moderate AS.
  • Key findings indicated that both "paradoxical" and "classical" low-flow, low-gradient patterns were independently linked to increased all-cause mortality, emphasizing the importance of improved patient classification in moderate AS cases.
View Article and Find Full Text PDF

Objective: To investigate the prognostic impact of left ventricular (LV) diastolic dysfunction in patients with moderate aortic stenosis (AS) and preserved LV systolic function.

Methods: Patients with a first diagnosis of moderate AS (aortic valve area >1.0 and ≤1.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to find the significance of various biomarkers in predicting outcomes for patients with aortic stenosis (AS), particularly in terms of mortality and heart failure.
  • Researchers measured biomarkers like NT-proBNP, hsTnT, and MR-proADM in 173 patients with moderate to severe AS over several years, analyzing their effectiveness in predicting primary and secondary health outcomes.
  • Results indicated that MR-proADM had the strongest correlation with worse health outcomes, suggesting it could be the key biomarker for assessing risk in AS patients.
View Article and Find Full Text PDF

Introduction: Despite reports suggesting an association between COVID-19 mRNA vaccination and pericarditis and myocarditis, detailed nationwide population-based data are sparsely available. We describe the incidence of pericarditis and myocarditis by age categories and sex after COVID-19 mRNA vaccination from a nationwide mass vaccination programme in Singapore.

Methods: The incidence of adjudicated cases of pericarditis and myocarditis following COVID-19 mRNA vaccination that were reported to the vaccine safety committee between January to July 2021 was compared with the background incidence of myocarditis in Singapore.

View Article and Find Full Text PDF

Aims: Moderate aortic stenosis (AS) is associated with an increased risk of adverse events. Because outcomes in patients with AS are ultimately driven by the condition of the left ventricle (LV) and not by the valve, assessment of LV remodelling seems important for risk stratification. This study evaluated the association between different LV remodelling patterns and outcomes in patients with moderate AS.

View Article and Find Full Text PDF

Aims: The aim of this study is to investigate the independent determinants of survival in patients with moderate aortic stenosis (AS), stratified by severity of symptoms and left ventricular ejection fraction (LVEF).

Methods And Results: Patients with a first diagnosis of moderate AS (aortic valve area >1.0 and ≤1.

View Article and Find Full Text PDF

Left ventricular ejection fraction is the conventional measure used to guide heart failure management, regardless of underlying etiology. Left ventricular global longitudinal strain (LV-GLS) by speckle tracking echocardiography (STE) is a more sensitive measure of intrinsic myocardial function. We aim to establish LV-GLS as a marker of replacement myocardial fibrosis on cardiovascular magnetic resonance (CMR) and validate the prognostic value of LV-GLS thresholds associated with fibrosis.

View Article and Find Full Text PDF

Objective: Inflammation plays a crucial role in tumorigenesis and progression. Our purpose was to investigate the prognostic value of neutrophil-to-lymphocyte ratio (NLR), systemic inflammation response index (SIRI) and systemic immune-inflammation index (SII), and develop a nomogram to predict the cancer-specific survival (CSS) and disease-free survival (DFS) of stage I lung adenocarcinoma patients.

Methods: 1431 patients undergoing surgical resection with pathologically confirmed stage I lung adenocarcinoma were reviewed.

View Article and Find Full Text PDF

Aims: Clinical guidelines recommend that the exercise protocol of a stress echocardiogram is selected to induce volitional exhaustion after a target duration of at least 8 minutes. While the Bruce protocol is very commonly used for clinical stress tests, it is known to be "steep", and many patients therefore fail to reach 8 minutes. We studied predictors of failure and developed a method for identifying patients not suitable for Bruce protocol which was accurate and yet simple enough to be used as a point-of-care decision support tool.

View Article and Find Full Text PDF

Background: The criteria to define the grade of aortic stenosis (AS)-aortic valve area (AVA) and mean gradient (MG) or peak jet velocity-do not always coincide into one grade. Although in severe AS, this discrepancy is well characterised, in moderate AS, the phenomenon of discordant grading has not been investigated and its prognostic implications are unknown.

Objectives: To investigate the occurrence of discordant grading in patients with moderate AS (defined by an AVA between 1.

View Article and Find Full Text PDF

Objectives: This study aimed to evaluate the prevalence and prognostic value of the extent of extra-aortic valvular cardiac abnormalities in a large multicenter registry of patients with moderate AS.

Background: The prognostic significance of a new classification system that incorporates the extent of cardiac injury (beyond the aortic valve) has been proposed in patients with severe aortic stenosis (AS). Whether this can be applied to patients with moderate AS is unclear.

View Article and Find Full Text PDF

Background: Diastolic dysfunction can be caused by hypertension or diabetes mellitus, and it is also often found with increasing age. In a given patient, the cause of diastolic dysfunction is therefore not always obvious. We sought to study the interplay of these risk factors for diastolic dysfunction in an outpatient population with a low likelihood of ischemic heart disease.

View Article and Find Full Text PDF

Aims: Cardiac damage in severe aortic stenosis (AS) can be classified according to a recently proposed staging classification. The present study investigated the incremental prognostic value of left ventricular (LV) global longitudinal strain (GLS) over stages of cardiac damage in patients with severe AS.

Methods And Results: From an ongoing registry, a total of 616 severe symptomatic AS patients with available LV GLS by speckle tracking echocardiography were selected and retrospectively analysed.

View Article and Find Full Text PDF