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- W2000511786 abstract "Hypothermic synchronized retroperfusion (HSRP) was applied in closed-chest dogs after acute coronary occlusion to determine whether this intervention can significantly retard the otherwise rapidly developing irreversible ischemic injury. The left anterior descending coronary artery (LAD) was occluded for 3 hours in 22 dogs and for 6 hours in 16 dogs. Starting 30 minutes after occlusion, HSRP was applied during maintained coronary occlusion in 21 dogs. The remaining dogs served as untreated controls. Arterial blood was cooled to 20 degrees C and retroperfused in diastole into the regional coronary veins. Hemodynamics, contrast cineangiography and two-dimensional echocardiography were measured sequentially. Glycogen-depleted ischemic areas and necrotic zones were delineated in transverse slices of the left ventricle. Untreated controls dogs further deteriorated; in contrast, HSRP between 30 minutes and 3- and 6-hour LAD occlusion significantly reduced the rate-pressure product (21.3 +/- 4.0% or 26.8 +/- 8.2%) and left ventricular end-diastolic pressure (39.5 +/- 9.5% or 51.4 +/- 7.7%) and increased ejection fraction (28 +/- 17% and 33 +/- 2.0%). HSRP caused no arrhythmias and led to much less necrosis of ischemic myocardium in the treated 3- or 6-hour occlusion series (7.4 +/- 2.7% or 28.9 +/- 12.6%) than in respective untreated controls (47.1 +/- 8.9% and 72.3 +/- 5.9%). Moderately hypothermic closed-chest phased retroperfusion appears to protect reversibly injured ischemic myocardium and improve cardiac function. Such treatment may be particularly suitable in the earliest stages of evolving myocardial infarction, when maintenance of myocardial viability is essential for preservation of jeopardized myocardium while awaiting coronary bypass revascularization or nonsurgical thrombolytic reperfusion." @default.
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- W2000511786 date "1982-06-01" @default.
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- W2000511786 title "Hypothermic coronary venous phased retroperfusion: a closed-chest treatment of acute regional myocardial ischemia." @default.
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- W2000511786 doi "https://doi.org/10.1161/01.cir.65.7.1435" @default.
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