Ongoing assertion of two-dimensional measurements on differentiation type of left ventricular hypertrophy: Focus on

Gamze Babur Guler1, Arda Guler1, Ibrahim Halil Tanboga2

  • 1Department of Cardiology, University of Health Sciences, Mehmet Akif Ersoy Thoracic Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey.

Insights

Inferior vena cava (IVC) assessment aids in differentiating left ventricular hypertrophy (LVH) subtypes. Dilated and non-collapsible IVC suggests cardiac amyloidosis (CA), while IVC dilation may support hypertrophic cardiomyopathy (HCM) diagnosis.

Area of Science:

  • Cardiology
  • Diagnostic Imaging
  • Echocardiography

Background:

  • Left ventricular hypertrophy (LVH) encompasses hypertensive LVH, hypertrophic cardiomyopathy (HCM), and cardiac amyloidosis (CA), posing diagnostic challenges.
  • Echocardiography is a key tool in cardiology, but differentiating LVH subtypes requires careful evaluation.

Purpose of the Study:

  • To investigate the utility of echocardiographic inferior vena cava (IVC) assessment in distinguishing between hypertensive LVH, HCM, and CA.
  • To determine if IVC diameter and collapsibility can serve as reliable markers for specific LVH etiologies.

Main Methods:

  • Retrospective analysis of 211 patients with diagnosed LVH (hypertensive, HCM, CA).
  • Assessment of echocardiographic IVC diameter and collapsibility alongside clinical and other imaging data.
  • Evaluation of diagnostic probabilities based on IVC parameters and associated clinical findings.

Main Results:

  • Significant differences in IVC diameter (CA > HCM > hypertensive LVH) and collapsibility (hypertensive LVH > HCM > CA) were observed (p < .001).
  • Cardiac amyloidosis (CA) showed significantly dilated IVC (21.1 mm) and reduced collapsibility (12%).
  • Hypertrophic cardiomyopathy (HCM) exhibited intermediate IVC dilation (16.0 mm) and reduced collapsibility (72%). Hypertensive LVH had smaller IVC (13.4 mm) and high collapsibility (95%).

Conclusions:

  • Simple echocardiographic assessment of the IVC is valuable for the differential diagnosis of LVH subtypes.
  • IVC dilation and reduced collapsibility are indicative of more infiltrative cardiomyopathies like CA, while IVC changes may also support HCM diagnosis.
Abstract

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