Development of a Modified QuEChERS Extraction for the Detection of Rosemary Extracts (E392) Expressed as Sum of Carnosol and Carnosic Acid in Food by LC-MS/MS.

Background: Rosemary extracts are derived from the leaves of Rosmarinus officinalis and commonly employed as natural food preservative. They serve as natural antioxidants in food, preventing spoilage and extending shelf life.

Objective: This study aimed to develop a modified QuEChERS extraction with liquid chromatography tandem mass spectrometry for the analysis of rosemary extracts in food as sum of its markers Carnosol and Carnosic Acid.

Guideline-Based Critical Care Pathway Improves Long-Term Clinical Outcomes in Patients with Acute Coronary Syndrome.

Implementation of a critical care pathway (CCP) for acute coronary syndrome (ACS) has been shown to improve early compliance to guideline-directed therapies and reduce early mortality. Nevertheless its long-term impact on the compliance with medications or clinical outcomes remains unknown. Between 2004 and 2015, 2023 consecutive patients were admitted to our coronary care unit with ACS.

Incidence of dual antiplatelet therapy interruption within 1 year after primary percutaneous coronary intervention in patients with acute ST elevation myocardial infarction.

Background: After primary percutaneous coronary intervention (PPCI) in patients with acute ST elevation myocardial infarction (STEMI), dual antiplatelet therapy (DAPT) is recommended to continue for 1 year. Occasionally, DAPT interruption may be required due to bleeding issues or unplanned surgical procedures.

Objective: To systematically evaluate the incidence of DAPT interruption within 1 year after PPCI.

TIMI risk score for secondary prevention of recurrent cardiovascular events in a real-world cohort of post-non-ST-elevation myocardial infarction patients.

Background: Patients who survive non-ST-elevation myocardial infarction (NSTEMI) are at heightened risk of recurrent cardiovascular events. Data on long-term secondary atherothrombotic risk stratification are limited.

Objectives: To stratify post-NSTEMI patients for risk of recurrent cardiovascular events to maximise benefit from aggressive secondary prevention strategies using the TIMI Risk Score for Secondary Prevention (TRS 2°P) score in a real-world cohort of NSTEMI patients.

Thrombolysis in Myocardial Infarction Risk Score for Secondary Prevention of Recurrent Cardiovascular Events in a Real-World Cohort of Post-Acute Myocardial Infarction Patients.

Background: Patients who survive myocardial infarction (MI) are at risk of recurrent cardiovascular (CV) events. This study stratified post-MI patients for risk of recurrent CV events using the Thrombolysis in Myocardial Infarction (TIMI) Risk Score for Secondary Prevention (TRS 2°P).

Methods and results: This was an observational study that applied TRS 2°P to a consecutive cohort of post-MI patients.

Phenylboronic Acid Solid Phase Extraction Cleanup and Isotope Dilution Liquid Chromatography-Tandem Mass Spectrometry for the Determination of Florfenicol Amine in Fish Muscles.

Florfenicol (FFC) residues in foods are regulated as the sum of florfenicol and its metabolites measured as florfenicol amine (FFA). An isotope dilution LC-MS/MS method utilizing phenylboronic acid (PBA) SPE cleanup is established for the accurate determination of FFA in fish muscles (i.e.

Fast and high throughput screening ofamantadine in chicken muscle by extractive derivatization with pentafluorobenzoyl chloride and gas chromatography/negative ion chemical ionization-tandem mass spectrometry.

A fast and high throughput screening method for the determination of amantadine (ADA) in chicken muscle is presented. After acidic extraction and extractive derivatization with pentafluorobenzoyl chloride, ADA was analyzed directly without any preconcentration by GC/negative ion chemical ionization-tandem MS/MS. With the selective MS/MS detection, ADA in chicken muscle can be detected at concentrations well below 1 microg/kg.

Long-term clinical outcomes after deployment of femoral vascular closure devices in coronary angiography and percutaneous coronary intervention: an observational single-centre registry follow-up.

Objectives: There are few data evaluating the long-term effect of femoral vascular closure devices (FCDs) on patients' clinical outcome. We aim to evaluate the incidence of peripheral vascular disease (PVD) in patients who received FCD following its deployment in coronary angiography and percutaneous coronary intervention (PCI) procedures.

Design And Setting: Observational study of a single-centre registry.

Determination of avilamycin as dichloroisoeverninic acid in poultry and porcine muscles by isotope dilution liquid chromatography-tandem mass spectrometry.

Avilamycin residue in food is regulated as its marker residue dichloroisoeverninic acid (DIA). An isotope dilution liquid chromatography-tandem mass spectrometry method is established for the accurate determination of DIA in animal muscles without any pre-extraction and preconcentration prior to alkaline hydrolysis. Optimization of the sample cleanup procedures such as liquid-liquid extraction and solid phase extraction was performed by fine-tuning several critical parameters to reduce the matrix effects.

Determination of N-methyl-1,3-propanediamine in bovine muscle by liquid chromatography with triple quadrupole and ion trap tandem mass spectrometry detection.

Morantel, pyrantel and their drug-related metabolites in food of animal-origin are regulated as sum of residues which may be hydrolysed to N-methyl-1,3-propanediamine (NMPA). In this study, an isotope dilution liquid chromatography tandem mass spectrometry (LC-MS/MS) method with pentafluoropropionic acid anhydride (PFPA) derivatization was developed for the determination of NMPA in bovine muscle. A stable isotope labeled internal standard N-methyl-d(3)-3,3'-d(2)-propane-1,3-diamine (NMPA-d(5)) was synthesized as internal standard.

Determination of closantel and rafoxanide in animal tissues by online anionic mixed-mode solid-phase extraction followed by isotope dilution liquid chromatography tandem mass spectrometry.

A rapid and high-throughput isotope dilution LC-MS/MS method with online sample pre-concentration and clean-up using anionic mixed-mode SPE was described for the determination of closantel and rafoxanide in edible bovine and ovine tissues. Tissue samples were extracted with acetonitrile and acetone mixture (60:40, v/v). Sample pre-concentration, clean-up and analysis were completed simultaneously with the online MAX SPE LC-MS/MS system.

Quantitative analysis of closantel and rafoxanide in bovine and ovine muscles by high-performance liquid chromatography with fluorescence detection.

An HPLC method with a fluorescence detector (HPLC-FLD) was described for the quantitative determination of closantel and rafoxanide in bovine and ovine muscles. A structural analog closely related to rafoxanide, viz., N-[4-(4-chlorophenoxy)phenyl]-2-hydroxy-3,5-diiodobenzamide, was synthesized as an internal standard.

Screening of closantel and rafoxanide in animal muscles by HPLC with fluorescence detection and confirmation using MS.

A sensitive and selective LC-FLD method was described for determination of closantel and rafoxanide in bovine and ovine muscles. Bovine and ovine muscles were extracted with ACN and acetone mixture (80:20, v/v). After cleanup with Oasis MAX SPE cartridges, the sample was analyzed by LC-FLD using the control point approach.