Early echocardiographic findings in β-thalassemia intermedia patients using standard and tissue Doppler methods

Area of Science:

• Cardiology
• Hematology
• Medical Imaging

Background:

• Beta-thalassemia intermedia (TI) is a severe genetic blood disorder.
• Cardiac complications, including heart failure, are a significant cause of morbidity and mortality in TI patients.
• Early detection of myocardial dysfunction is crucial for managing TI patients.

Purpose of the Study:

• To evaluate myocardial function in patients with beta-thalassemia intermedia.
• To compare standard Doppler and pulsed Doppler tissue imaging parameters between TI patients and healthy controls.
• To identify subclinical cardiac changes in TI patients.

Main Methods:

• A comparative study involving 51 TI patients and 20 healthy controls.
• Echocardiography including M-mode, standard Doppler, and pulsed Doppler tissue imaging (TDI).
• Analysis of clinical parameters and various echocardiographic indices.

Main Results:

• Pulmonary artery hypertension was detected in 21.5% of TI patients.
• M-mode echocardiography (ejection fraction, fractional shortening) showed no significant changes.
• Pulsed Doppler revealed significant differences in mitral and tricuspid valve diastolic function (E/A ratio).
• Pulsed TDI demonstrated significant increases in septal and tricuspid annular systolic and diastolic velocities (Ss, Aas, St, Eat, Aat).
• Significant changes were observed in posterior wall systolic velocity and anterior wall late diastolic velocity.

Conclusions:

• Beta-thalassemia intermedia patients exhibit significant myocardial functional changes detectable by pulsed Doppler and TDI, despite normal M-mode and 2D echocardiography.
• Pulsed Doppler and TDI are valuable tools for assessing subclinical cardiac involvement in TI.
• These findings underscore the importance of advanced echocardiographic techniques for comprehensive cardiac evaluation in TI.