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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Hemodynamic and histomorphometric characteristics of heart failure induced by aortic stenosis in the guinea pig: comparison of two constriction sizes.
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Hemodynamic and histomorphometric characteristics of heart failure induced by aortic stenosis in the guinea pig: comparison of two constriction sizes.

机译:豚鼠主动脉瓣狭窄引起的心力衰竭的血流动力学和组织形态学特征:两种收缩大小的比较。

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摘要

Heart failure induced by aortic stenosis in young guinea pigs could constitute an interesting model for pharmacology, but its natural history needs to be characterized. One hundred five guinea pigs (3-4 weeks old) underwent thoracic aortic banding with 12- (B12G) or 14-gauge (B14G) needles or similar sham operations (S12G, S14G). Animals alive at 7 d (S12G, n = 16; B12G, n = 28; S14G, n = 19; B14G, n = 27) were assessed at 60 or 120 d. At 60 d, compared with sham groups, left ventricular (LV) mass and wall thickness increased in operated groups, but LV systolic pressure and right ventricular (RV) wall thickness only increased in the B14G group. At 120 d, B12G animals still showed signs of compensated hypertrophy with LV and RV wall thickening (+8%, +21%) and LV dilation (+20%), whereas B14G animals showed signs of decompensation with LV end-diastolic pressure increase (+167%) and mean arterial pressure decrease (-28%) associated with LV and RV hypertrophy (+77%, + 51%) and greater increases of LV and RV wall thickening (+19%, + 57%), as well as LV dilation (+43%). A 12G stenosis results in compensated hypertrophy at 60 and 120 d; a 14G stenosis leads to compensated hypertrophy at 60 d and heart failure at 120 d.
机译:在幼小豚鼠中,由主动脉瓣狭窄引起的心力衰竭可能构成了一种有趣的药理模型,但其自然史需要加以描述。对一百五十只豚鼠(3-4周龄)用12针(B12G)或14针(B14G)针或类似的假手术(S12G,S14G)进行胸主动脉束带。在第60天或120天评估7天存活的动物(S12G,n = 16; B12G,n = 28; S14G,n = 19; B14G,n = 27)。与假手术组相比,在第60天,手术组左心室(LV)质量和壁厚增加,但B14G组仅左心室收缩压和右心室(RV)壁厚增加。在120天时,B12G动物仍然表现出代偿性肥大的迹象,LV和RV壁增厚(+ 8%,+ 21%)和LV扩张(+ 20%),而B14G动物表现出代偿失调的迹象,LV舒张末期压力升高与LV和RV肥大相关的(+ 167%)和平均动脉压降低(-28%)(+ 77%,+ 51%)和LV和RV壁增厚的更大增加(+ 19%,+ 57%)以及LV扩张(+ 43%)。 12G狭窄会在60和120 d导致代偿性肥大。 14G狭窄在60 d导致代偿性肥大,在120 d导致心力衰竭。

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