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早搏后强化作用(postextrasystolic potentiation PESP)是指一次早搏后心肌收缩力加强现象。国外自80年代以来研究应用于评定心肌收缩性及心脏的储备功能,认为PESP指标具有不受前、后负荷影响,能揭示心肌病变早期或轻度受损的收缩性改变,是目前评定心肌收缩性的良好指标。但检测PESP均以心内起搏诱发早搏,用心导管测定早搏前后的dp/dt_(max),以早搏后与早搏前dp/dt_(max)的比值Rdp/dt_(max)作为评定心肌收缩性指标,属创伤性,设备条件要求高,有一定的危险性,难以普遍推广应用。
Postextrasystolic potentiation (PESP) refers to an early myocardial contractility to strengthen the phenomenon. Abroad since the 1980s studies have been used to assess myocardial contractility and cardiac reserve function, that PESP indicators without before and after the load, can reveal early or mild impaired myocardial lesion contractility changes, is the assessment of myocardial contraction Good indicator of sex. However, the detection of preeclampsia in PESP was preemptively induced by intracardiac pacing. The dp / dt max of preeclampsia was determined by cardiac catheterization. The ratio of Rdp / dt max was determined as the ratio of dp / dt max before premature beat Indicators, is traumatic, demanding equipment conditions, there is a certain danger, it is difficult to promote the general application.