No-reflow phenomenon epidemiology and demographics

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Jennifer Giuseffi, M.D.; David M. Leder, M.D.; Ayokunle Olubaniyi, M.B,B.S [2]

Overview

Epidemiology and Demographics

The reported incidence of no-reflow phenomenon ranges between 0.6-42% depending on the defining criteria and the clinical setting. It has been reported in anywhere from 11-30% of patients following thrombolysis or intervention in acute myocardial infarction. However, in routine, elective coronary intervention, the prevalence has been reported to be as low as 0.6-2%. This phenomenon appears to be more frequent during interventions on saphenous vein grafts (SVG) or thrombus containing lesions as well as during the use of rotational atherectomy. Gender does not appear to play a role in this phenomenon, but it seems to occur more frequently in older patients and in those who did not experience pre-infarct angina. Admission hyperglycemia has also been associated with higher incidence of no-reflow as well as worse outcomes. Lesions at high-risk forno-reflow include: diffuse atherosclerotic involvement, angiographic demonstrable thrombus, irregular or ulcerative lesions, and long lesions with large plaque volume. No-reflow is a common (15%) finding during primary angioplasty for acute MI.

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