Publications by authors named "Guo Dong Tang"

Objectives: Patients undergoing a prior failed attempt of chronic total occlusion-percutaneous coronary intervention (CTO-PCI) represent a challenging subgroup across all patients undergoing CTO-PCI. There are limited data on the effects of a prior failed attempt on the outcomes of subsequent CTO-PCI. We aimed to compare the procedural results and 24-month outcomes of prior-failed-attempt CTO-PCI with those of initial-attempt CTO-PCI.

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Article Synopsis
  • The study aimed to analyze the characteristics of the anterior chamber and angle in Chinese children of different refractive statuses using advanced imaging techniques.
  • A total of 383 children were examined, focusing on measurements like anterior chamber depth, width, angle-opening distance, and trabecular-iris space area, and they were categorized into hyperopic, emmetropic, and myopic groups.
  • Results showed that myopic children had deeper anterior chambers and wider angles, while girls exhibited shorter axial lengths and shallower anterior chambers compared to boys.
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Background: There are scarce published data reporting the effect of rotational atherectomy (RA) on coronary microcirculation function.

Objectives: We aimed to evaluate coronary microcirculation function indicated by the coronary angiography-derived index of microvascular resistance (caIMR) in patients undergoing RA.

Methods: RA procedures between January 2013 and December 2021 were retrospectively analyzed.

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Purpose: Renal artery stenosis leads to ischemic renal insufficiency, but methods for assessing renal perfusion are limited. This study aimed to evaluate the association between renal slow perfusion and impaired renal function in atherosclerotic renal artery stenosis (ARAS).

Patients And Methods: A total of 79 consecutive patients with uncontrolled hypertension who underwent renal angiography and renal dynamic scintigraphy for suspected ARAS were enrolled in the retrospective descriptive study.

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Objective: We evaluated the safety and efficacy of rotational atherectomy (RA) in patients with a reduced left ventricular ejection fraction (LVEF).

Methods: In total, 140 consecutive patients with severe coronary artery calcification (CAC) who underwent RA were retrospectively enrolled. Patients were grouped based on LVEF: ≤35% (n = 10), 36% to 50% (n = 11), and >50% (n = 119).

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Background: In prenatal diagnosis, CMA has begun to emerge as a favorable alternative to karyotype analysis, but it could not identify balanced translocations, triploidies, inversion and heteromorphisms. Therefore, conventional cytogenetic and specific staining methods still play an important role in the work-up of chromosome anomaly. This study investigated the application of C-banding and AgNOR-staining techniques in prenatal diagnosis of chromosomal heteromorphisms and some structure abnormalities.

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Background: There are little published data reporting the effect of coronary artery chronic total occlusion (CTO) percutaneous coronary intervention (PCI) on the prognosis of elderly patients with identified CTOs. We sought to evaluate the clinical effect of CTO PCI on the prognosis of elderly patients with CTOs.

Methods: A total of 445 consecutive patients diagnosed with a CTO by angiography from January 2011 to December 2013 were enrolled.

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Rationale: Coronary artery aneurysms and fistulas are not rare conditions in clinical practice, but bilateral fistulas with a giant coronary aneurysm in just one person are quite rare.

Patient Concerns: We report a case of a 66-year-old woman with these 2 coronary abnormalities accompanied with a huge mediastinum mass.

Interventions: The giant aneurysm was ligated and the mass was resected which was proved to be an organized hematoma finally.

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An efficient and mild Ir(III)-catalyzed, chelation assisted C-H alkynylation of arenes has been developed using hypervalent iodine alkynes as alkynylating reagents. A broad scope of N-phenyl-2-aminopyridines and 2-phenoxypyridines has been established as effective substrates for this C-H functionalization and the desired alkynylated products were isolated in moderate to high yields.

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In the setting of primary percutaneous coronary intervention (PCI), encountering with chronic total occlusion (CTO) in a noninfarct-related artery (IRA) is not a rare situation. Limited information on the impact of CTO on clinical outcomes in acute ST-elevation myocardial infarction (STEMI) patients undergoing primary PCI has raised more concerns. The aim of the present study was to evaluate the effect of concurrent CTO in a non-IRA on the clinical outcomes in patients with STEMI undergoing primary PCI.

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Rh(iii)-catalyzed C-H activation of 3-aryl-dihydroisoxazoles in the coupling with diarylacetylenes has been developed under redox-neutral conditions. This reaction occurred under mild conditions with no by-product, and the N-O bond functions as an oxidizing directing group, leading to efficient synthesis of isoquinolines functionalized with a proximal secondary alcohol.

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A series of asymmetric donor-acceptor substituted salen-type Schiff-bases have been synthesized and their structures, electronic properties and second order nonlinearities were investigated by DFT methods. In order to verify the stable of these Schiff-base derivates, the IR spectrum of these Schiff-base derivates were calculated, the result showed that these compounds are stable. The results of TD-DFT calculation indicate that the derivatives with the electron-donating group (CH3, OCH3 or N(C2H5)2) have a red shift absorption compared to derivatives with the electron-withdrawing group (NO2).

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Theoretical calculations were carried out on some neutral nest-shaped heterothiometallic cluster compounds [MOS(3)Py(5)Cu(3)X] (M=Mo, W; X=F, Cl, Br, I) with the high first static hyperpolarizabilities beta values. The geometries of these cluster compounds were optimized by the restricted DFT method at B3LYP level with LanL2DZ base set without any constrains. In order to understand the relationship between the first static hyperpolarizabilities and the compositions of these clusters, the frontier orbital compositions and energy gaps between the HOMO and LUMO orbitals were calculated and analysed.

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