320排动态容积CT对左心室静脉系统的评价
Evaluation of left ventricular venous system with 320-slice dynamic volume computed tomography
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摘要: 目的 应用320排动态容积CT对左心室静脉系统进行评价,以指导心脏再同步治疗(CRT)中左心室电极的植入。 方法 对110例行冠状动脉检查的患者同时进行冠状静脉系统重建,重建时相在体表心电图RR间期的30%-80%。其中男性40例,女性70例,年龄(57.9±10.8)岁。 结果 所有患者均可清晰显示心脏静脉系统,91.2%的患者在30%-50%的RR间期得到最佳成像效果;在CRT最常用的靶静脉(心后侧静脉和心侧静脉),单支靶静脉缺如合并另一支细小的占23.6%-26.4%,双支均缺如占5.5%。 结论 320排动态容积CT可以提供清晰的心脏静脉系统影像,特别是可以对CRT最常用的靶静脉进行系统评价,帮助指导CRT左室电极的植入。Abstract: Objective To facilitate the implantation of left ventricular（LV） lead in cardiac resynchronization therapy（CRT） by evaluating the LV venous system with 320-slice dynamic volume computed tomography（CT）. Methods The LV venous system was reconstructed in 110 patients with coronary heart disease（40 males and 70 females） at the age of 57.9±10.8 years during which the R–R interval of body surface ECG was 30%-80%. Results The LV venous system was clearly observed in all patients.The best imaging was achieved in 91.2% of the patients when the R–R interval of body surface ECG was 30%-50%.One of the 2 most frequently used target veins（postero-lateral vein and lateral vein） in CRT was not found in 23.6%-26.4% of the patients,while both of them were not be observed in 5.5% of the patients. Conclusion 320-slice dynamic volume CT can clearly show the LV venous system and evaluate the most frequently used target veins in CRT,thus contributing to the implantation of LV lead during CRT.
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