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Evaluation of Systolic and Diastolic Properties of Hypertensive Heart Failure Using Speckle-tracking Echocardiography with High Volume Rates

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Journal Heart Vessels
Date 2017 Jun 23
PMID 28638961
Citations 5
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Abstract

Left ventricular (LV) properties in hypertension (HTN) could be deteriorated by pressure overload, especially in endocardium, resulting in hypertensive heart failure (HHF). We sought to noninvasively examine LV systolic and diastolic functions at three myocardial layers in HTN and elucidate features of HHF by speckle-tracking echocardiography (STE) with high volume rates. We examined normotensive controls (n = 54), HTN patients without LV hypertrophy (LVH) (n = 50), and HTN patients with LVH (n = 40) and HHF patients (n = 45). The HHF group was divided into two subgroups based on their LVEF (20 heart failure with preserved ejection fraction: HFpEF and 25 heart failure with reduced ejection fraction: HFrEF). LV layer systolic function was assessed by strain rate during systole. Pulmonary capillary wedge pressure (PCWP) was estimated (ePCWP) using kinetics-tracking index (KT index) that we previously reported. HTN patients with LVH had a significant deterioration of systolic and diastolic properties compared with normotensive controls in the absence of a significant reduction in LVEF. Patients with HHF had further deterioration of systolic and diastolic properties compared with HTN patients with LVH. LV strain at entire myocardium and ePCWP in HFrEF was deteriorated compared with those in HFpEF. Deterioration of LV layer SR was more typical during systole, isovolumic relaxation, and early diastole compared with control. LV dilation was independently associated with LVEF (r = -0.48, p < 0.001) and ePCWP (r = 0.47, p < 0.001), and LVH (LV mass index) was independently associated with E/e' (r = 0.37, p = 0.025), LVEF (r = -0.44, p < 0.001), and ePCWP (r = 0.67, p < 0.001). LV layer analysis by STE could detect subtle impairments in systolic function before the deterioration of LVEF in patients with HTN. The ePCWP that was estimated using KT index was the independent factor associated with HHF. The ePCWP may be useful to noninvasively detect the early stage of HHF.

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