1.One‑year outcomes of anterior–posterior vs. anterior‑lateral method of cardioversion for atrial fibrillation: a tertiary center experience
Sarim RASHID ; Syed Ahmed SALAHUDDIN ; Fatima SAJID ; Syed Yasir SHAH ; Jahanzeb MALIK ; Saifullah KHAN
International Journal of Arrhythmia 2024;25(1):3-
This retrospective cohort study aimed to compare the one-year outcomes of anterior–posterior (AP) and anterior— lateral (AL) methods of cardioversion for atrial fibrillation (AF). A total of 2168 patients were included, with 1125 patients in the AP cardioversion group (Group 1) and 1043 patients in the AL cardioversion group (Group 2). Baseline characteristics, primary and secondary outcomes, safety outcomes, and logistic regression predictors of sinus rhythm were analyzed. The results showed comparable rates of maintaining sinus rhythm at the one-year follow-up between the two groups (65.8% in Group 1 vs. 65.7% in Group 2, p = 0.042). There were no significant differences in the incidence of AF recurrence or safety outcomes between the groups. Logistic regression analysis identified the duration of AF and the presence of coronary artery disease as significant predictors of sinus rhythm maintenance. Additionally, the use of the AL method was associated with a higher likelihood of AF recurrence compared to the AP method (p = 0.043). These findings suggest that both the AP and AL methods of cardioversion are effective in achieving and maintaining sinus rhythm in AF patients. The duration of AF and the presence of coronary artery disease should be considered when selecting the cardioversion approach. These results contribute to the understanding of optimal treatment strategies for AF and support personalized management decisions based on individual patient characteristics.
2.Rapid Identification of Methylglyoxal Trapping Constituents from Onion Peels by Pre-column Incubation Method.
Ji Hoon KIM ; Myeong Il KIM ; Ahmed Shah SYED ; Kiwon JUNG ; Chul Young KIM
Natural Product Sciences 2017;23(4):247-252
The methylglyoxal (MGO) trapping constituents from onion (Allium cepa L.) peels were investigated using pre-column incubation of MGO and crude extract followed by HPLC analysis. The peak areas of MGO trapping compounds decreased, and their chemical structures were identified by HPLC-ESI/MS. Among major constituents in outer scale of onion, 2-(3,4-dihydroxybenzoyl)-2,4,6-trihydroxy-3(2H)-benzofuranone (2) was more effective MGO scavenger than quercetin (6) and its 4′-glucoside, spiraeoside (3). After 1 h incubation, compound 2 trapped over 90% MGO at a concentration of 0.5 mM under physiological conditions, but compounds 3 and 6 scavenged 45%, 16% MGO, respectively. HPLC-ESI/MS showed that compound 2 trapped two molecules of MGO to form a di-MGO adduct and compounds 3 and 6 captured one molecule of MGO to form mono-MGO adducts, and the positions 6 and 8 of the A ring of flavonoids were major active sites for trapping MGO.
Catalytic Domain
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Chromatography, High Pressure Liquid
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Flavonoids
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Methods*
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Onions*
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Pyruvaldehyde*
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Quercetin
3.Trapping of Methylglyoxal by Sieboldin from Malus baccata L. and Identification of Sieboldin-Methylglyoxal Adducts Forms
Ji Hoon KIM ; Kaixuan ZHANG ; Juhee LEE ; En Mei GAO ; Yun Jung LEE ; Rak Ho SON ; Ahmed Shah SYED ; Chul Young KIM
Natural Product Sciences 2021;27(4):245-250
The methylglyoxal (MGO) trapping constituents from Malus baccata L. were investigated using incubation of MGO and crude extract under physiological conditions followed by HPLC analysis. The peak areas of MGO trapping compounds decreased, and their chemical structures were identified by HPLC-ESI/MS. Sieboldin was identified as a major active molecule representing MGO-trapping activity of the crude extract. After reaction of sieboldin and MGO, remaining MGO was calculated by microplate assay method using imine (Schiff base) formation of 2,4-dinitrophenylhydrazine (DNPH) and aldehyde group. After 4 h incubation, sieboldin trapped over 43.8% MGO at a concentration of 0.33 mM and showed MGO scavenging activity with an RC 50 value of 0.88 mM for the incubation of 30 min under physiological conditions. It was also confirmed that sieboldin inhibited the production of advanced glycation end products (AGE) produced by bovine serum albumins (BSA)/MGO. Additionally, MGO trapping mechanism of sieboldin was more specifically identified by 1 H-, 13 C-, 2D NMR and, confirm to be attached to the position of C-3' (or 5').
4. Syzygium aromaticum ethanol extract reduces AlCl
Sanila AMBER ; Touqeer AHMED ; Saadia ZAHID ; Syed ALI SHAH ; Syed ALI SHAH
Asian Pacific Journal of Tropical Medicine 2018;11(2):123-130
Objective: To investigate the neuroprotective effects of Syzygium aromaticum (S. aromaticum) extract (500 mg/kg) on AlCl