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目的探讨甲状腺机能亢进性心脏病的Q-T离散度(Q-Td)及其心率校正值(Q-Tcd)改变的临床意义。方法选择53例临床确诊为甲状腺机能亢进性心脏病患者的体表12导联心电图并与50例单纯甲状腺机能亢进患者及50例正常人作对照。结果甲状腺机能亢进性心脏病组、单纯甲状腺机能亢进组及正常人组Q-Td分别为(53.9±10.2)ms、(31.8±7.9)ms、(29.8±6.2)ms;Q-Tcd分别(62.0±12.4)ms、(36.5ms±8.5)ms、(32.8±6.8)ms显示甲状腺机能亢进Q-Td及Q-Tcd明显延长(P<0.01)。结论揭示Q-Td、Q-Tcd延长对临床甲状腺机能亢进性心脏病的诊断有一定的参考意义。
Objective To investigate the clinical significance of Q-Td (Q-Td) and its Q-Tcd (Q-Tcd) changes in patients with hyperthyroid heart disease. Methods 53 cases of clinically diagnosed as hyperthyroid heart disease in patients with body surface 12-lead ECG and 50 patients with simple hyperthyroidism and 50 normal controls. Results Q-Td was (53.9 ± 10.2) ms, (31.8 ± 7.9) ms and (29.8 ± 6.2) ms respectively in patients with hyperthyroid heart disease, hyperthyroidism and normal controls ± 12.4 ms, 36.5 ms ± 8.5 ms and 32.8 ± 6.8 ms respectively. The Q-Td and Q-Tcd of hyperthyroidism were significantly prolonged (P <0.01). Conclusions revealed Q-Td, Q-Tcd extension of the clinical diagnosis of hyperthyroidism heart disease have some reference value.