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平均年龄66(43～88)岁的30(男13、女17)例症状性窦性缓慢心律失常患者(A组),确诊为SND。其中冠心病7例、高血压性心脏病3例和心肌炎1例;心脏增大10例;心力衰竭在治疗中6例。另以平均年龄67(53～76)岁的18(男7、女11)例健康人(B组)为对照。作者曾以75例健康人为对象,1分钟体表心电图经测定20～29岁、30～39岁、40～49岁、50～59岁和60～69岁各年龄组的正常值如下:(1)标化SCL变异范围([最长SCL-最短SCL]/平均SCL,均值±2x标准差)分别为29.2±2×8.7％、29.0±2×6.6％,
Thirty (13 males and 17 females) symptomatic patients with sinus arrhythmia (group A) with a mean age of 66 (43-88) years were diagnosed as SND. Of which 7 cases of coronary heart disease, hypertensive heart disease in 3 cases and myocarditis in 1 case; heart increased 10 cases; heart failure in the treatment of 6 cases. Another 18 (male 7, female 11) healthy subjects (group B) with a mean age of 67 (53-76) were used as controls. The authors have 75 healthy subjects, 1 minute body surface electrocardiogram measured 20 to 29 years old, 30 to 39 years old, 40 to 49 years old, 50 to 59 years old and 60 to 69 age groups of normal values are as follows: (1 ) The range of standardization SCL ([longest SCL-shortest SCL] / average SCL, mean ± 2 standard deviation) was 29.2 ± 2 × 8.7%, 29.0 ± 2 × 6.6%, respectively,