Multi-parametric assessment of left ventricular hypertrophy using late gadolinium enhancement, T1 mapping and

Sorin Giusca1, Henning Steen2, Moritz Montenbruck2

  • 1Departments of Cardiology, Vascular Medicine and Pneumology, GRN Hospital Weinheim, Roentgenstrasse 1, 69469, Weinheim, Germany.

Insights

Single heartbeat fast-strain encoded (SENC) cardiovascular magnetic resonance (CMR) myocardial strain effectively differentiates athletes from hypertrophic cardiomyopathy (HCM) and hypertensive heart disease (HHD). Combining strain with late gadolinium enhancement (LGE) aids in distinguishing HHD from HCM and HCM from cardiac amyloidosis.

Area of Science:

  • Cardiology
  • Medical Imaging
  • Biophysics

Background:

  • Left ventricular hypertrophy (LVH) presents in various forms, including hypertensive heart disease (HHD), hypertrophic cardiomyopathy (HCM), and cardiac amyloidosis, necessitating accurate differentiation.
  • Distinguishing between these conditions and healthy states or athletic adaptations is crucial for appropriate patient management and treatment strategies.

Purpose of the Study:

  • To assess the efficacy of single heartbeat fast-strain encoded (SENC) cardiovascular magnetic resonance (CMR) derived myocardial strain in differentiating various forms of left ventricular hypertrophy (LVH).
  • To evaluate the combined diagnostic utility of SENC strain and late gadolinium enhancement (LGE) for classifying LVH subtypes.

Main Methods:

  • Analysis of 314 patients, including those with HHD, HCM, amyloidosis, competitive athletes, and healthy controls.
  • Assessment of left ventricular ejection fraction (LVEF), LV mass index, interventricular septal (IVS) thickness, T1 mapping, and atypical LGE.
  • Quantification of the percentage of LV myocardial segments with strain ≤ -17% (%normal myocardium).

Main Results:

  • Patients with amyloidosis and HCM showed significantly higher IVS thickness compared to other groups.
  • Amyloidosis patients exhibited the highest LV mass index and lower LVEF than controls.
  • In mild to moderate hypertrophy, %normal myocardium accurately differentiated athletes from HCM (AUC=1.0) and athletes from HHD (AUC=0.85).
  • The combination of %normal myocardial strain and atypical LGE demonstrated high accuracy in differentiating HHD vs. HCM (AUC=0.92) and HCM vs. amyloidosis (AUC=0.83).

Conclusions:

  • Fast-SENC derived myocardial strain is a valuable tool for differentiating athletes from HCM and HHD.
  • Integrating SENC strain with LGE data enhances diagnostic accuracy for distinguishing between HHD, HCM, and cardiac amyloidosis.
Abstract