J Cardiovasc Imaging.  2023 Jan;31(1):41-48. 10.4250/jcvi.2022.0064.

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

Affiliations
  • 1Division of Cardiology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
  • 2Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
  • 3Division of Cardiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
  • 4Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
  • 5Division of Cardiology, Hallym University Medical Center, Pyungchon, Korea

Abstract

BACKGROUND
The function of left atrium (LA) is difficult to assess because of its ventricledependent, 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.

Keyword

Left atrial function; Left ventricular hypertrophy; Hypertrophic cardiomyopathy
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