门控PET/CT评价猪双侧乳内动脉Y型搭桥术后的心肌血供

目的 应用门控PET/CT评价猪双侧乳内动脉Y型搭桥术后桥血管和冠状动脉形态、心肌灌注、左心室功能.方法 对6头实验猪行双侧乳内动脉Y型搭桥术.术后送至PET中心对其再行门控13N-NH3心肌灌注和CT冠状动脉造影.结果 6头猪共12条桥血管的18处吻合口中15处显示清晰,冠状动脉充盈良好；左心室各壁心肌灌注放射性分布均匀,室壁运动正常,左心室功能均大于50％.结论 门控PET/CT可无创地评价搭桥术后血管形态、心肌灌注和左心室功能.双侧乳内动脉Y型搭桥术可为心脏提供充足血供.

Gated PET/CT evaluation on myocardial blood-supply of pigs after bilateral internal mammary artery Y-bypass operation

Objective To observe the shape of bridge vessels and coronary artery, myocardial perfusion and left ventricle function of pigs after bilateral internal mammary artery Y-bypass operation with gated PET/CT. Methods Six pigs were proceeded bilateral internal mammary artery Y-bypass operation, and were sent to PET center after operation. Then ¹³N-NH₃ gated PET and CT coronary angiography were performed. Results Twelve bridge vessels and 15 in 18 anastomotic places were showed clearly. Coronary arteries filled well. The myocardial perfusion was well-distributed of left ventricular wall. The motion of the wall was normal. The left ventricular ejection function was greater than 50%. Conclusion Gated PET/CT can be used for noninvasive evaluation of vessels, myocardial perfusion and left ventricle function. Bilateral internal mammary artery Y-bypass operation can provide enough blood supply for the pig's heart.