Kawakami Y, Sakai Y, Kawamura K
Department of Internal Medicine, Osaka Medical College.
Nihon Rinsho. 1995 Jan;53(1):161-7.
Identification of the focus of premature ventricular contraction (PVC) has been reported by various body surface mapping methods: i.e. PVC isopotential map, ventricular activation time map, QRS isointegral map, PVC T wave map, etc. For evaluating the clinical usefulness and diagnostic significance of QRST isointegral map in patients with PVC, 23 patients without apparent underlying heart disease (group N), and 44 patients with dilated cardiomyopathy (group D), were studied. The significant changes in QRST values at maximal points during two activation sequences (basic rhythm and PVC) were detected in group D (N:D = 26.6 +/- 17.6:52.6 +/- 27.0%, p < 0.01), which were frequently directed to the PVC focus and influenced by the short coupling interval (Q-Q interval: 300-390 ms). In conclusion, QRST isointegral map reflecting ventricular gradient may be useful for identifying the presence of underlying heart disease and may correlate with the focus and coupling interval of PVC.
各种体表标测方法已报道了室性早搏（PVC）起源点的识别：即PVC等电位图、心室激动时间图、QRS等积分图、PVC T波图等。为评估QRST等积分图对PVC患者的临床实用性和诊断意义，对23例无明显潜在心脏病的患者（N组）和44例扩张型心肌病患者（D组）进行了研究。在D组中检测到两个激动序列（基本心律和PVC）期间最大点处QRST值的显著变化（N组：D组=26.6±17.6：52.6±27.0%，p<0.01），这些变化常指向PVC起源点，并受短联律间期（Q-Q间期：300 - 390 ms）影响。总之，反映心室梯度的QRST等积分图可能有助于识别潜在心脏病的存在，并可能与PVC的起源点和联律间期相关。
