早期复极综合征与急性心肌梗死的Q-T间期和Q-T离散度

Q-T interval and Q-T dispersion of early repolarization syndrome and myocardial infarction

为了解早期复极综合征与急性心肌梗死患者的Q-T间期,Q-T离散度的差异,比较28例早期复极综合征和42例急性心肌梗死Q-T间期、Q-T离散度。结果显示:(1)各个导联Q-T间期可测量率(与T波终点确认难易相关)两组间情况不同:早期复极综合征组易测量导联比例低于急性心肌梗死组。(2)早期复极综合征组各导联Q-T间期均小于急性心肌梗死组(P<0.01),早期复极综合征组于ST段抬高导联Q-T间期较长。{3)早期复极综合征组Q-T离散度(32.4±11.4ms)显著小于急性心肌梗死组(69.7±22.1ms,P<0.01)。认为Q-T间期和Q-T离散度可作为鉴别早期复极综合征与急性心肌梗死的一项较简便的无创性指标。

Q-T interval duration and Q-T dispersion were compared respectively between a group of 28 patients with documented early repolar-ization syndrome (group Ⅰ ) and another group of 42 patients with a-cute myocardial infarction (group Ⅱ ) .Results showed: (l) Identification of endpoint of T wave in group Ⅰ was similar to that of normal in the degree of difficulty. (2) Duration of Q - T interval in group Ⅰ was shorter than that in group Ⅱ Prolonged Q-T interval duration in groupⅠ occurred only in these leads in which ST segments were elevated. (3) Dispersion of Q-T interval in group Ⅰ (32.4±11.4ms) was significantly lower as compared with that in group Ⅱ (69.7 ± 22. 1ms, P < 0.01) .As a simple noninvasive procedure , Q - T interval duration and Q-Td have proved to be helpful useful in differentiating patients with early repolarization syndrome from those with acute myocardial infarction.