Key result
β-Thalassemia minor is associated with a significantly lower heart rate-corrected augmentation index compared to controls (median 22.25 vs 27, P=.008).
Why the study?
Is β-Thalassemia minor associated with favorable pulse wave augmentation indices and left ventricular diastolic profile in asymptomatic individuals?
Cross-Sectional (n=202)
Is β-Thalassemia minor associated with favorable pulse wave augmentation indices and left ventricular diastolic profile in asymptomatic individuals?
β-Thalassemia minor is associated with favorable pulse wave augmentation indices and left ventricular diastolic function profile in asymptomatic individuals with cardiovascular risk factors.
Hypothesis-generating for vascular protection in β-thalassemia minor; should not yet change practice or guide management.
β-Thalassemia minor (β-Τm) is associated with rheological and biochemical alterations that can affect cardiovascular function. We aimed to evaluate the elastic arterial properties and the pulse wave augmentation indices in a population of patients with β-Τm. Seventy-five individuals with β-Τm (age 55.5 [42.75-65.25], women 48%) and 127 controls (age 57 years [48-63], women 55.1%) underwent comprehensive echocardiographic evaluation and applanation tonometry of the radial and femoral artery. Pulse wave analysis revealed that augmentation pressure, augmentation index (AIx), and heart rate-corrected AIx were significantly lower (median [interquartile range]: 8.75 [4.625-13] vs 11 [6.5-14.5], P = .017; 26.5 [17.5-33.375] vs 30.5 [20.75-37.5], P = .014; and 22.25 [15.125-29.5] vs 27 [20.5-33], P = .008, respectively) in the β-Τm group compared to controls. The left atrial active emptying volume was significantly lower and the isovolumic relaxation time was shorter in the β-Τm group compared to the control group (10.2 [7.4-14.4] vs 12.0 [8.6-15.8], P = .040 and 78 [70-90] vs 90 [70-104], P = .034, respectively). β-Thalassemia minor is associated with favorable pulse wave augmentation indices and left ventricular diastolic function profile in asymptomatic individuals with cardiovascular risk factors.
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Chamaidi et al. (2017) conducted a cross-sectional in β-Thalassemia minor (n=202). β-Thalassemia minor vs. Controls was evaluated on Heart rate-corrected augmentation index (AIx) (p=.008). β-Thalassemia minor is associated with a significantly lower heart rate-corrected augmentation index compared to controls (median 22.25 vs 27, P=.008).
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