Department of Cardiology, Faculty of Medicine, Niğde Ömer Halisdemir University, Niğde, Turkey
Department of Cardiology, Sivas Numune Hospital, Sivas, Turkey
Turk J Med Sci. 2020 Jun 23;50(4):724-730. doi: 10.3906/sag-1901-69.
BACKGROUND/AIM: This study aimed to evaluate the effect of successful percutaneous mitral balloon valvuloplasty (PMBV) on left ventricular systolic functions using strain and strain rate echocardiography in moderate–severe mitral stenosis (MS) patients with normal left ventricular systolic function confirmed by conventional echocardiography.
Patients with moderate–severe MS who had undergone successful PMBV were included. Conventional echocardiographic parameters were evaluated before and after PMBV. Peak systolic strain and strain rate values of basal, mid, and apical segments of the left ventricular anterior, inferior, septum, and lateral walls were determined.
After PMBV, significant decreases were determined in the peak and mean gradients of the mitral valve and pulmonary artery pressure, but a significant increase in the mitral valve area. Significant increases (improvement) were determined in the peak systolic strain and strain rate in the basal, mid, and apical segments of the left ventricular septum, lateral, anterior, and inferior walls and in the left ventricular global peak systolic strain (–17.32 ± 0.58% vs. –12.38 ± 1.06%) and strain rate (–1.65 ± 0.07 vs. –1.22 ± 0.12).
Strain and strain rate echocardiography can be used for quantitative evaluation of the effect of PMBV on the left ventricular systolic functions in moderate–severe MS patients.
背景/目的：本研究旨在通过应变和应变率超声心动图评估常规超声心动图证实左心室收缩功能正常的中重度二尖瓣狭窄（MS）患者经皮二尖瓣球囊成形术（PMBV）成功后左心室收缩功能的影响。
纳入接受成功 PMBV 的中重度 MS 患者。评估 PMBV 前后的常规超声心动图参数。测量左心室前壁、下壁、间隔和侧壁基底、中部和心尖段的收缩期峰值应变和应变率值。
PMBV 后，二尖瓣和肺动脉压力的峰值和平均梯度显著降低，但二尖瓣瓣口面积显著增加。左心室间隔、侧壁、前壁和下壁基底、中部和心尖段以及左心室整体收缩期峰值应变（-17.32±0.58% vs. -12.38±1.06%）和应变率（-1.65±0.07 vs. -1.22±0.12）均显著增加（改善）。
应变和应变率超声心动图可用于定量评估 PMBV 对中重度 MS 患者左心室收缩功能的影响。
