Berdín M, Rizzardo P, Zevallos J C, Cardín G, Bittante M, Nava A
Arch Inst Cardiol Mex. 1987 Mar-Apr;57(2):111-5.
Morphology, genesis and incidence of isolated T wave abnormalities on right precordial leads of healthy young individuals were studied in this work. ECG were obtained from 1510 healthy subjects aged 14 to 40 years consecutively submitted to a cardiological evaluation in order to assess their fitness for sport. In 510 of them a VCG was made too. The results showed that T waves were rarely negative beyond V1 (0.46%) and even more rarely negative from V1 to V3 (0.13%); diphasic T waves were present in 2.38% and bifid T waves in 6.15% of our cases. The T loop of VCG tended to be more posteriorly displaced and evolved from a counterclockwise to a clockwise rotation as the presence of negative T waves spread toward left on precordial leads. The "+-" type of diphasic T wave corresponded to a counterclockwise rotation of the T loop, the "-+" type to a clockwise rotation. Bifid T waves were associated with figure of eight or "arched" T loops of VCG. The T loops of those subjects who underwent a second evaluation after several years tended to be displaced more anteriorly, with counterclockwise rotation. The causes of these T wave abnormalities have not been clearly explained yet, even if a slight delay in the right final vectors was present in the majority of our cases.
本研究对健康年轻个体右胸前导联孤立性T波异常的形态、发生机制及发生率进行了探讨。连续选取1510例年龄在14至40岁之间的健康受试者进行心电图检查，以评估其运动适应性，同时对其中510例进行了心向量图检查。结果显示，V1导联之后T波倒置罕见（0.46%），V1至V3导联T波倒置更为罕见（0.13%）；双相T波出现率为2.38%，双峰T波出现率为6.15%。随着胸前导联T波倒置向左扩展，心向量图T环向后移位且从逆时针旋转演变为顺时针旋转。双相T波的“+-”型对应T环逆时针旋转，“-+”型对应顺时针旋转。双峰T波与心向量图的“8”字形或“拱形”T环相关。数年后接受二次评估的受试者T环往往向前移位且逆时针旋转。尽管大多数病例存在右终末向量轻度延迟，但这些T波异常的原因尚未明确。
