Background

The incidence of supraventricular arrhythmia (SVA) is high in patients with mitral valve prolapse (MVP). The purpose of our study was to determine the role of parameters showing atrial conduction heterogeneity such as P‑wave dispersion (PWD) and atrial electromechanical delay (AEMD) in predicting the development of SVA in MVP patients.

Methods

A total of 76 patients with MVP (56 female, 20 male) were included in the study. The patients were divided into two groups according to the presence or absence of SVA: 36 patients were allocated to the non-SVA group and 40 patients to the SVA group. Heart rate variability (HRV), PWD, and AEMD values were determined and compared.

Results

The PWD was found to be higher in the SVA group. Interatrial EMD was 32.00 ms (25.00–35.00) in patients with SVA while it was 18.00 ms in patients without SVA (11.00–23.75); the intra-atrial EMD was 17.0 ms (10.00–20.00) in patients with SVA whereas it was 10.00 ms (4.00–14.00) in patients without SVA. Lower HRV was found in the SVA group.

Conclusion

In the SVA group, PWD and AEMD were increased while HRV values were decreased. Noninvasive parameters may help predict the presence and incidence of SVA during the follow-up of this group of patients.

中文翻译：

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二尖瓣脱垂的室上性心律失常

背景

二尖瓣脱垂 (MVP) 患者室上性心律失常 (SVA) 的发生率很高。我们研究的目的是确定显示心房传导异质性的参数，如 P 波分散 (PWD) 和心房机电延迟 (AEMD) 在预测 MVP 患者 SVA 发展中的作用。

方法

共有 76 名 MVP 患者（56 名女性，20 名男性）被纳入研究。根据是否存在SVA将患者分为两组：非SVA组36例，SVA组40例。测定并比较了心率变异性 (HRV)、PWD 和 AEMD 值。

结果

发现 SVA 组的 PWD 较高。SVA 患者的房间 EMD 为 32.00 ms (25.00–35.00)，而没有 SVA 的患者为 18.00 ms (11.00–23.75)；SVA 患者的心房内 EMD 为 17.0 ms (10.00-20.00)，而没有 SVA 的患者为 10.00 ms (4.00-14.00)。在 SVA 组中发现较低的 HRV。

结论

在 SVA 组中，PWD 和 AEMD 增加，而 HRV 值降低。在这组患者的随访过程中，无创参数可能有助于预测 SVA 的存在和发生率。