Background -Atherosclerosis has been implicated as a cause of valvular calcification. The aim of this study was to determine whether atherosclerotic calcification in multiple vascular areas is significantly associated...Background -Atherosclerosis has been implicated as a cause of valvular calcification. The aim of this study was to determine whether atherosclerotic calcification in multiple vascular areas is significantly associated with aortic or mitral annular calcification independent of traditional risk factors. Methods and Results -A total of 1242 consecutive asymptomatic patients free of clinical coronary heart disease were studied by electron-beam computed tomography for the extent of calcium due to atherosclerosis in 5 distinct vascular beds and calcium in the aortic and mitral annuli. Nearly 24%had calcium in the aortic annulus, whereas 8%were found to have mitral annular calcification. Age and a history of hypertension were the only traditional cardiovascular risk factors that were independently associated with prevalent calcification in the aortic and mitral annuli. After adjustment for age, gender, and cardiovascular disease risk factors, subjects with calcium in the thoracic aorta had the highest odds for the presence of aortic annular calcium(OR=3.9, P< 0.01), whereas those with calcium in the abdominal aorta had the highest odds for mitral annular calcification(OR=5.1, P=0.01). Standardized increases in calcium in the abdominal aorta(OR=2.0, P< 0.01) and iliacs(OR=1.8, P=0.01) were significantly associated with calcium in the aortic annulus after adjustment for the extent of calcium in the other vascular beds, whereas the thoracic aorta was significantly associated(OR=1.4, P=0.02) with calcium in the mitral annulus. Conclusions -This study supports the hypothesis that calcification of the mitral and aortic annuli is related to atherosclerosis in other vascular beds.展开更多
目的采用超声心动图评价原发性高血压合并Ⅱ型糖尿病(hypertension and typeⅡdiabetes melllitus,DMTH)患者与健康人群的二尖瓣环与主动脉瓣环平面夹角(Aortomitral angle,AMA)的运动变化及其与左室收缩功能的关系。方法纳入59例DMTH...目的采用超声心动图评价原发性高血压合并Ⅱ型糖尿病(hypertension and typeⅡdiabetes melllitus,DMTH)患者与健康人群的二尖瓣环与主动脉瓣环平面夹角(Aortomitral angle,AMA)的运动变化及其与左室收缩功能的关系。方法纳入59例DMTH患者及63例性别年龄相匹配的健康人作为对照组,所有参选病例均行常规超声心动图检查,平静状态下采集连续五个心动周期的二维灰阶动态图像,于胸骨旁左室长轴切面上,依次测量等容收缩期起始(Start of isovolume contraction,Sivct-AMA)、S波顶点(S wave peak,Sp-AMA)、等容舒张期起始(Start of isovolume relaxtion,Sivrt-AMA)、舒张期末(End of diastolic,Ed-AMA)对应的AMA,角度差(⊿θ)=AMAmax-AMAmin,角度变化率=⊿θ/AMAmax。使用Philips QLAB 10.3二维斑点追踪定量分析软件获取左室整体纵向应变(The global longitudinal strain,GLS)及整体周向应变(The global circumferntial strain,GCS)。采用Simpson’s双平面法测量左室射血分数(Left ventrical eject fraction,LVEF)。两组间结果的比较采用两独立样本t检验,P<0.001为差异有统计学意义;两参数间的相关性分析采用Pearson相关分析,P<0.05为差异有统计学意义。结果 DMTH组的GLS、GCS较对照组明显减低,差异有统计学意义(P<0.05),LVEF无明显差异(P>0.05);Sp-AMA较对照组明显增大,P<0.05,差异有统计学意义;其余时相的AMA与对照组相比,无统计学差异(P>0.05);⊿θ、⊿θ/AMAmax较对照组明显减小,差异有统计学意义(P<0.05)。正常对照组内⊿θ、⊿θ/AMAmax均与GLS绝对值呈正相关性(r=0.372、P=0.004,r=0.349、P=0.007),而与GCS的绝对值、LVEF均无相关性。与对照组相比,DMTH组患者⊿θ、⊿θ/AMAmax与LVEF均呈正相关(r=0.289、P=0.022,r=0.325、P=0.009),与GLS、GCS均无相关性。结论 DMTH患者AMA的增大可能是瓣环联合体为保持左室有效射血而发生的适应性改变,是心肌间质纤维立体网络重构的一种表现。展开更多
二尖瓣环钙化(简称 MAC)是老年人常见的退行性病变,国外已将本病定为临床上有意义的疾病,由于诊断方法的限制,不易在生前做出临床诊断。近年来超声心动图的迅速发展为 MAC 提供了可靠的诊断手段,我们对老年性 MAC 超声心动图诊断、临床...二尖瓣环钙化(简称 MAC)是老年人常见的退行性病变,国外已将本病定为临床上有意义的疾病,由于诊断方法的限制,不易在生前做出临床诊断。近年来超声心动图的迅速发展为 MAC 提供了可靠的诊断手段,我们对老年性 MAC 超声心动图诊断、临床特点进行了探讨和分析。展开更多
文摘Background -Atherosclerosis has been implicated as a cause of valvular calcification. The aim of this study was to determine whether atherosclerotic calcification in multiple vascular areas is significantly associated with aortic or mitral annular calcification independent of traditional risk factors. Methods and Results -A total of 1242 consecutive asymptomatic patients free of clinical coronary heart disease were studied by electron-beam computed tomography for the extent of calcium due to atherosclerosis in 5 distinct vascular beds and calcium in the aortic and mitral annuli. Nearly 24%had calcium in the aortic annulus, whereas 8%were found to have mitral annular calcification. Age and a history of hypertension were the only traditional cardiovascular risk factors that were independently associated with prevalent calcification in the aortic and mitral annuli. After adjustment for age, gender, and cardiovascular disease risk factors, subjects with calcium in the thoracic aorta had the highest odds for the presence of aortic annular calcium(OR=3.9, P< 0.01), whereas those with calcium in the abdominal aorta had the highest odds for mitral annular calcification(OR=5.1, P=0.01). Standardized increases in calcium in the abdominal aorta(OR=2.0, P< 0.01) and iliacs(OR=1.8, P=0.01) were significantly associated with calcium in the aortic annulus after adjustment for the extent of calcium in the other vascular beds, whereas the thoracic aorta was significantly associated(OR=1.4, P=0.02) with calcium in the mitral annulus. Conclusions -This study supports the hypothesis that calcification of the mitral and aortic annuli is related to atherosclerosis in other vascular beds.
文摘目的采用超声心动图评价原发性高血压合并Ⅱ型糖尿病(hypertension and typeⅡdiabetes melllitus,DMTH)患者与健康人群的二尖瓣环与主动脉瓣环平面夹角(Aortomitral angle,AMA)的运动变化及其与左室收缩功能的关系。方法纳入59例DMTH患者及63例性别年龄相匹配的健康人作为对照组,所有参选病例均行常规超声心动图检查,平静状态下采集连续五个心动周期的二维灰阶动态图像,于胸骨旁左室长轴切面上,依次测量等容收缩期起始(Start of isovolume contraction,Sivct-AMA)、S波顶点(S wave peak,Sp-AMA)、等容舒张期起始(Start of isovolume relaxtion,Sivrt-AMA)、舒张期末(End of diastolic,Ed-AMA)对应的AMA,角度差(⊿θ)=AMAmax-AMAmin,角度变化率=⊿θ/AMAmax。使用Philips QLAB 10.3二维斑点追踪定量分析软件获取左室整体纵向应变(The global longitudinal strain,GLS)及整体周向应变(The global circumferntial strain,GCS)。采用Simpson’s双平面法测量左室射血分数(Left ventrical eject fraction,LVEF)。两组间结果的比较采用两独立样本t检验,P<0.001为差异有统计学意义;两参数间的相关性分析采用Pearson相关分析,P<0.05为差异有统计学意义。结果 DMTH组的GLS、GCS较对照组明显减低,差异有统计学意义(P<0.05),LVEF无明显差异(P>0.05);Sp-AMA较对照组明显增大,P<0.05,差异有统计学意义;其余时相的AMA与对照组相比,无统计学差异(P>0.05);⊿θ、⊿θ/AMAmax较对照组明显减小,差异有统计学意义(P<0.05)。正常对照组内⊿θ、⊿θ/AMAmax均与GLS绝对值呈正相关性(r=0.372、P=0.004,r=0.349、P=0.007),而与GCS的绝对值、LVEF均无相关性。与对照组相比,DMTH组患者⊿θ、⊿θ/AMAmax与LVEF均呈正相关(r=0.289、P=0.022,r=0.325、P=0.009),与GLS、GCS均无相关性。结论 DMTH患者AMA的增大可能是瓣环联合体为保持左室有效射血而发生的适应性改变,是心肌间质纤维立体网络重构的一种表现。
