Left atrial function and phenotypes in asymmetric hypertrophic cardiomyopathy

Kobayashi, Yukari; Wheeler, Matthew T.; Finocchiaro, Gherardo; Ariyama, Miyuki; Pérez, Marco; Liang, David; Kuznetsova, Tatiana; Schnittger, Ingela; Ashley, Euan A.; Haddad, François

doi:10.1111/echo.13533

Cited by 9 publications

(4 citation statements)

References 37 publications

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“…However, some researchers showed that contractile function of LA was relatively preserved while reservoir and conduit function were significantly impaired among HCMP patients as measured by LA strain, 22) 23) 29) results of patients with different ages, heart function, and analyzing systems. Kobayashi et al 29) calculated LA strain with LA wall length and presented impaired total and passive LA function in obstructive HCMP. Other studies showed preserved contractile function using XStrain software (Esaote S.p.A, Florence, Italy).…”

Section: Discussionmentioning

confidence: 99%

Left Atrial Velocity Vector Imaging Can Assess Early Diastolic Dysfunction in Left Ventricular Hypertrophy and Hypertrophic Cardiomyopathy

Yoon

Park

Choi

et al. 2023

J Cardiovasc Imaging

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BACKGROUND The function of left atrium (LA) is difficult to assess because of its ventricle-dependent, dynamic movement. The aim of this study was to assess LA function using velocity vector imaging (VVI) and compare LA function in patients with hypertrophic cardiomyopathy (HCMP) and left ventricular hypertrophy (LVH) with normal controls. METHODS Fourteen patients with HCMP (72% male, mean age of 52.6 ± 9.8), 15 hypertensive patients with LVH (88% male, mean age of 54.0 ± 15.3), and 10 age-matched controls (83% male, mean age of 50.0 ± 4.6) were prospectively studied. Echocardiographic images of the LA were analyzed with VVI, and strain rate (SR) was compared among the 3 groups. RESULTS The e′ velocity (7.7 ± 1.1; 5.1 ± 0.8; 4.5 ± 1.3 cm/sec, p = 0.013), E/e′ (6.8 ± 1.6; 12.4 ± 3.3; 14.7 ± 4.2, p = 0.035), and late diastolic SR at mid LA (−1.65 ± 0.51; −0.97 ± 0.55; −0.82 ± 0.32, p = 0.002) were significantly different among the groups (normal; LVH; HCMP, respectively). The e′ velocity, E/e′, and late diastolic SR at mid LA were significantly different between normal and LVH (p = 0.001; 0.022; 0.018), whereas LA size was similar between normal and LVH (p = 0.592). The mean late diastolic peak SR of mid LA was significantly correlated with indices of diastolic function (E/e′, e′, and LA size). CONCLUSIONS The SR is a useful tool for detailed evaluation of LA function, especially early dysfunction of LA in groups with normal LA size.

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Section: Discussionmentioning

confidence: 99%

Left Atrial Velocity Vector Imaging Can Assess Early Diastolic Dysfunction in Left Ventricular Hypertrophy and Hypertrophic Cardiomyopathy

Yoon

Park

Choi

et al. 2023

J Cardiovasc Imaging

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“…We also found that LAV was significantly higher than that of the control group ( P < 0.05). Although HCM patients in this study had no obvious clinical symptoms, LA function was also impaired in HCM patients with no symptoms or mild symptoms [ 24 ]. Moreover, we found that LAV was significantly correlated with GCW, GWW and GWE, considering that patients with HCM had both systolic and diastolic dysfunction.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of global and regional myocardial work in hypertrophic cardiomyopathy patients by left ventricular pressure-strain loop

Xiao,

Zhao,

Sun

et al. 2023

BMC Cardiovasc Disord

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Objective This study aimed to investigate the value of left ventricular (LV) press-strain loop (PSL) in evaluating global and regional myocardial work (MW) in hypertrophic cardiomyopathy (HCM) patients. Methods A total of 30 HCM patients with interventricular septum hypertrophy (HCM group) and 35 healthy subjects (control group) were selected from First Hospital of Qinhuangdao. The general clinical data and conventional ultrasound parameters of two groups were acquired. The MW parameters were analyzed using LV PSL. The regional MW parameters in the HCM group were compared between ventricular septum and the free walls of left ventricle. Results The epicardial adipose tissue thickness of the HCM group was significantly greater than that of the control group (P < 0.05). Global work efficiency was significantly reduced, while global wasted work was increased in patients with HCM compared with controls (all P < 0.05). The HCM group was compared in the group, to be specific, in the HCM group, the work index, the work efficiency, and the longitudinal strain on the interventricular septum were lower than those on the free wall (all P < 0.05). Conclusion PSL is more effective than LVEF in assessing left ventricular systolic function in HCM and is able to quantify regional myocardial work in the ventricular septum in HCM patients with preserved LVEF, suggesting a novel idea for clinical diagnosis and assessment.

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“…However, the view on the LA booster pump function is still divided in the existing literature. Yukari et al [22] demonstrated that all phasic LA functions containing booster pump function significantly declined in patients with HCM compared with the healthy group. Other researchers considered LA booster pump function as a compensatory mechanism for the LVEF via enhancing LAAEF and contraction strain; in their study, HCM patients had lower reservoir and conduit function while having enhanced pump function in comparison with the control group [23, 24].…”

Section: Discussionmentioning

confidence: 99%

Analysis of Left Atrial Function after Percutaneous Intramyocardial Septal Radiofrequency Ablation in Hypertrophic Cardiomyopathy

Dai

Duan

et al. 2022

Cardiology

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Objectives: The main goal of our research is to explore the effect of percutaneous intramyocardial septal radiofrequency ablation (PIMSRA) on left atrial (LA) phasic function in hypertrophic cardiomyopathy (HCM). Methods: The study included 13 patients who underwent PIMSRA in our hospital from. The function of LA including reservoir, conduit, and booster pump was analyzed and compared before and six months after PIMSRA in HCM patients. LA reservoir function parameters contain maximal LA volume (LAV max), minimal LA volume (LAV min), LA ejection fraction (LAEF), LA expansion index (LAEI), and reservoir strain; LA conduit function includes LA volume before atrial systole (LAV pre-A), LA passive volume, LA passive ejection fraction (LAPEF) and conduit strain; LA booster function involves LA booster volume, LA active ejection fraction (LAAEF) and LA contraction strain. Additionally, 20 healthy controls were selected to compare the LA function of HCM patients. Results: The preoperative LA reservoir and conduit function in HCM patients were significantly impaired compared with the control group, while the change in booster pump function was not obvious. HCM patients at six months after PIMSRA had remarkably enhanced reservoir and conduit function which were manifested by lower minimal LA volume (LAV min), higher LA ejection fraction (LAEF), LA expansion index (LAEI), reservoir, and conduit strain than before the operation, and the differences among these parameters between patients after PIMSRA and the healthy control group were not significant. However, with regard to LA contraction function, there was no significant improvement at 6 months after PIMSRA compared with before operation. Conclusion: PIMSRA is effective in the amelioration of LA reservoir and conduit function in patients with HCM, but not in a marked improvement of LA contraction function in these individuals in short term.

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Left atrial function and phenotypes in asymmetric hypertrophic cardiomyopathy

Abstract: LA function was impaired in patients with HCM even in minimally symptomatic nonobstructive phenotype. Total and passive LA function was further impaired in patients with obstructive HCM.

Cited by 9 publications

References 37 publications

Left Atrial Velocity Vector Imaging Can Assess Early Diastolic Dysfunction in Left Ventricular Hypertrophy and Hypertrophic Cardiomyopathy

Left Atrial Velocity Vector Imaging Can Assess Early Diastolic Dysfunction in Left Ventricular Hypertrophy and Hypertrophic Cardiomyopathy

Evaluation of global and regional myocardial work in hypertrophic cardiomyopathy patients by left ventricular pressure-strain loop

Analysis of Left Atrial Function after Percutaneous Intramyocardial Septal Radiofrequency Ablation in Hypertrophic Cardiomyopathy

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