Effect on left ventricular mass and geometry in patients with takotsubo cardiomyopathy

Area of Science:

• Cardiology
• Cardiovascular Imaging
• Medical Diagnostics

Background:

• Takotsubo cardiomyopathy (TTC) is characterized by transient left ventricular (LV) dysfunction.
• The impact of TTC on LV mass (LVM) and geometry requires further investigation.
• Comparative analysis of echocardiography and MRI in TTC is crucial for accurate assessment.

Purpose of the Study:

• To evaluate the effects of TTC on LVM and LV geometry.
• To compare LVM measurements between transthoracic echocardiography (TTE) and cardiac magnetic resonance imaging (MRI).
• To assess the coherence between TTE and MRI in quantifying LVM and segmental wall thickness (SWT) in TTC patients.

Main Methods:

• Retrospective analysis of 13 women with TTC who underwent both TTE and MRI at onset and three months later.
• LVM estimation using MRI and two TTE methods, including the truncated ellipsoid formula (TEF).
• Measurement of SWT and assessment of radial strain by TTE, with statistical analyses including Wilcoxon's, Mann-Whitney U, McNemar's, and Bland-Altman tests.

Main Results:

• LVM significantly decreased during recovery, as measured by MRI and the TEF method.
• The TEF method demonstrated better coherence with MRI for LVM assessment compared to other TTE methods.
• SWT decreased in most segments, but coherence between modalities was ambiguous; TEF data showed partial interaction with increased radial strain.

Conclusions:

• TTC is associated with an acute increase in LVM, potentially an apical effect linked to wall motion changes.
• MRI and TTE provide adequate coherence for assessing LVM in TTC.
• The TEF method shows particular promise for reliable LVM quantification in TTC using TTE.