نتایج جستجو برای: fractional flow reserve
تعداد نتایج: 563105 فیلتر نتایج به سال:
Effect of High (200 μg/kg per Minute) Adenosine Dose Infusion on Fractional Flow Reserve Variability
BACKGROUND Variations in distal coronary pressure (Pd)/aortic pressure (Pa) ratio during steady-state hyperemia with standard (140 μg/kg per minute) adenosine dose may hamper accurate fractional flow reserve assessment. This study investigated to what extent an increased adenosine dose can overcome Pd/Pa variation. METHODS AND RESULTS In a prospective, single-arm study, out of 95 prospectivel...
OBJECTIVES This study sought to demonstrate how changes in the collateral function and its clinical significance before and after percutaneous coronary interventions (PCIs) are compared between patients with acute coronary syndrome and total or nearly total occlusions (ATOs) and chronic total occlusions (CTOs). BACKGROUND The functional relevance of the collateral circulation in patients with...
INTRODUCTION We present the different roles of fractional flow reserve and optical coherence tomography in guiding treatment in a patient with recurrent chest pain. CASE PRESENTATION A 66-year-old Chinese woman presented to our department for the third time for her recurrent chest pain. Her physical examination was unremarkable; her previous two angiography examinations indicated that there w...
n engl j med 372;1 nejm.org january 1, 2015 94 difference. The observed loss of FEV1 was neither a time-dependent nor a dose-dependent effect in the withdrawal group, as compared with the maintenance group. A difference of 38 ml between groups became apparent only after the final step of inhaled glucocorticoid withdrawal and did not change to a meaningful extent thereafter. Singanayagam et al. ...
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