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- W2891086185 abstract "Introduction: Cold temperatures increase the incidence of myocardial infarction. Precise mechanisms remain unclear. Sudden severe myocardial oxygen supply/demand mismatch may be responsible. We measured coronary flow and myocardial work during cold air inhalation (CAI), invasively and with cardiac magnetic resonance imaging (CMR), aiming to elucidate the dominant mechanisms. Methods: All data were acquired at rest and peak stress during CAI: 5minutes -15oC via a face-mask. Simultaneous intracoronary pressure and flow velocity data were acquired in a target artery from 20 patients (10 with normal coronary arteries, 10 with a significant stenosis (CAD). Coronary flow average peak velocity (APV), microvascular resistance (MVR) and buckberg index (BI: a surrogate for subendocardial ischemia) were calculated. Wave intensity analysis also differentiated waves that accelerate and decelerate coronary flow. Separately CMR perfusion was performed in 7 patients with a significant stenosis to quantify myocardial perf..." @default.
- W2891086185 created "2018-09-27" @default.
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- W2891086185 date "2015-11-10" @default.
- W2891086185 modified "2023-09-26" @default.
- W2891086185 title "Abstract 15835: Cold Air Inhalation Induces Differential Effects on Coronary Microvascular Resistance and Flow Depending on Presence of Significant Coronary Artery Disease" @default.
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