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目的比较稳定型心绞痛(SAP)与不稳定型心绞痛(UAP)患者冠状动脉斑块CT特征的差异。方法搜集UAP和SAP各32例患者的MSCT图像进行对照分析。结果 UAP组和SAP组正性重构的发生率(26/45和7/54)差异有统计学意义(P<0.01)。点状钙化的发生率(10/17和9/33)差异有统计学意义(P<0.05)。偏心性斑块的发生率(39/45和32/54)差异有统计学意义(P<0.01)。软斑块的平均CT值[(34.0±13.7)HU和(68.7±29.4)HU]差异有统计学意义(P<0.01)。结论 UAP患者冠状动脉粥样斑块的主要CT特征包括正性血管重构、斑块密度低和点状钙化等。
Objective To compare the differences of CT features of coronary plaque between patients with stable angina pectoris (SAP) and patients with unstable angina pectoris (UAP). Methods The MSCT images of 32 patients with UAP and SAP were collected for comparison. Results The incidence of positive remodeling between UAP group and SAP group (26/45 and 7/54) was statistically significant (P <0.01). The incidence of punctate calcification (10/17 and 9/33) was significantly different (P <0.05). The incidence of eccentric plaque (39/45 and 32/54) was statistically significant (P <0.01). The average CT value of soft plaques [(34.0 ± 13.7) HU and (68.7 ± 29.4) HU] was significantly different (P <0.01). Conclusions The main CT features of coronary atherosclerotic plaques in UAP patients include positive vascular remodeling, low plaque density and punctate calcification.