Prevalence of Heart Failure in the Cases of Beta-thalassemia Major; Two Years Follow-Up

摘要

Inroduction: Heart failure (HF) is an important cause of morbidity and mortality in the cases of Beta-thalassemia major. The purpose of this study was to estimate HF prevalence in these patients and to assess the survivability of those who were treated with intensive chelating therapy. Design and methods: This cross sectional study included 72 beta-thalassemia major cases, the mean age at the time of referral was 15.7±6.2 years (range 6-35 years) and were followed in a prospective 2 year study. A self-reporting symptom questionnaire was administered, a 12-lead ECG was taken and an echocardiography was obtained from all participants. Echocardiography was performed at 6 month intervals or when a new symptom developed. Results: Risk factors (except for iron overload) in the study population were hypothyroidism and diabetes mellitus. The male to female ratio was0.75.Twelve patients had left ventricular (LV) systolic dysfunction and 57,79% had LV diastolic dysfunction whereas 11,15% had RV failure. Fifty-nine (81%) patients had cardiac disease of which diastolic dysfunction was the most common manifestation .Those with systolic dysfunction were older at presentation (22 ± 6 years versus 31 ± 4 years; P