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Study of coronary sinus anatomy during levophase of coronary angiography

World Journal of Cardiology 2022年第6期14卷 372-381页

作者： Akshyaya Pradhan Vrishank Bajaj Pravesh Vishwakarma Monika Bhandari Akhil Sharma Gaurav Chaudhary Sharad Chandra Rishi Sethi varun shankar narain Sudhanshu Dwivedi Department of Cardiology King George Medical UniversityLucknow 226003Uttar PradeshIndia

BACKGROUND Coronary sinus(CS)imaging has recently gained importance due to increasing need for mapping and ablation of electrophysiological arrhythmias and left ventricular(LV)pacing during cardiac resynchronization therapy(CRT).Retrograde venogram is the current standard for imaging CS and its *** To evaluate CS anatomy during levophase of routine coronary angiography to aid LV lead implantation during *** In this prospective observational study,164 patients undergoing routine coronary angiography for various indications(Chronic stable angina-44.5%,acute coronary syndrome-39.5%,Dilated cardiomyopathy-11%,atypical chest pain-5%)were *** phase(levophase)of left coronary injection was recorded in left anterior oblique-cranial and right anterior oblique-cranial *** of coronary veins,width and shape of CS ostium,angulations of proximal CS with body of CS were ***,size,take-off angle and tortuosity of posterolateral vein(PLV),anterior interventricular veins(AIV)and middle cardiac vein(MCV)were also *** During levophase,visibility grade(Muhlenbruch grade)for coronary veins was 3 in 74%and 2 in 26%of *** of CS did not correlate with body mass *** diameter of CS ostium was15 mm in 48%,42%and 10%of patients *** CS was tubular in 136(83%)patients and funnel-shaped in 28(17%)*** take-off angulation between ostium and body of CS was seen in 16(10%)*** or more PLV were present in 8 patients while PLV was absent in 52(32%)*** of take-off of PLV with body of CS was favourable(0°-45°)in 65(40%)*** angle was 45°-90°in 36 patients and difficult take-off angle(>90°)was seen in 8 *** of PLV reached distal third of myocardium in 84 cases and middle third in 11 *** was no tortuosity in 79 cases,a single bend in 29 cases and more than 2 bends in 4 *** nine(24%)patients had other veins supplying poste

关键词： Posterolateral vein Ostium Angiography Sharp take off Favourable angulation

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Feasibility and efficacy of delayed pharmacoinvasive therapy for STelevation myocardial infarction

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World Journal of Cardiology 2023年第1期15卷 23-32页

作者： Rishi Sethi Lalit Mohan Pravesh Vishwakarma Abhishek Singh Swati Sharma Monika Bhandari Ayush Shukla Akhil Sharma Gaurav Chaudhary Akshyaya Pradhan Sharad Chandra varun shankar narain Sudhanshu Kumar Dwivedi Department of Cardiology King George's Medical UniversityLucknow 226003Uttar PradeshIndia

BACKGROUND ST-elevation myocardial infarction(STEMI)refers to a clinical syndrome that features symptoms of myocardial ischemia with consequent ST-elevation on electrocardiography and an associated rise in cardiac *** restoration of brisk flow in the coronary vasculature is critical in reducing mortality and *** patients with STEMI who could not receive primary percutaneous coronary intervention(PCI)on time,pharmacoinvasive strategy(thrombolysis followed by timely PCI within 3-24 h of its initiation)is an effective *** To analyze the role of delayed pharmacoinvasive strategy in the window period of 24-72 h after *** This was a physician-initiated,single-center prospective registry between January 2017 and July 2017 which enrolled 337 acute STEMI patients with partially occluded coronary *** received routine pharmacoinvasive therapy(PCI within 3-24 h of thrombolysis)in one group and delayed pharmacoinvasive therapy(PCI within 24-72 h of thrombolysis)in another *** primary endpoint was major adverse cardiac and cerebrovascular events(MACCE)within 30 d of the *** secondary endpoints included major bleeding as defined by Bleeding Academic Research Consortium classification,angina,and dyspnea within 30 *** The mean age in the two groups was comparable(55.1±10.1 years vs 54.2±10.5 years,P=0.426).Diabetes was present among 20.2%and 22.1%of patients in the routine and delayed groups,*** rate was 54.6%and 55.8%in the routine and delayed groups,*** was initiated within 6 h of onset of symptoms in both groups(P=0.125).The mean time from thrombolysis to PCI in the routine and delayed groups was 16.9±5.3 h and 44.1±14.7 h,*** significant difference was found for the occurrence of measured clinical outcomes in the two groups within 30 d(8.7%vs 12.9%,P=0.152).Univariate analysis of demographic characteristics and risk factors for patients who reporte

关键词： Coronary artery disease ST-elevation myocardial infarction Primary percutaneous coronary intervention Pharmacoinvasive strategy Thrombolysis Atherosclerosis

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Ground Rupturing Due to Entrapped Air/Gas in the Unconfined Zone

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International Journal of Geosciences 2010年第3期1卷 149-154页

作者： Manas Banerjee Vimla Prasad Singh Hridaya narain Singh Daya shankar Sun jay Uma Shanker Singh 不详

The sudden and large oscillation of pressure of compressed air/gas entrapped in porous medium due to the changes in the actual pore-fluid pressure, during recharge of water following intense rainfall after a prolonged period of dryness such that the rainfall intensity exceeding infiltration capacity, leads to the generation of hydo-tremors. These hydro-tremors cause ground rupturing, subsidence, developments of cracks in the building, etc. A theoretical model has been presented to estimate the successive values of compressed air/gas pressures due to the successive development of actual pore-fluid pressures and effective stresses during recharge of water of the unconfined zone during the onset of the summer monsoon of 2008 in the northern parts of India.

关键词： Unconfined Zone Compressed Air/Gas Pore-Fluid Pressure Hydro-Tremor Ground Rupturing Effective Stress

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