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Left ventricular filling and emptying patterns in anemia due to beta thalassemia. A computer-assisted
Insights
Patients with beta thalassemia showed normal or increased left ventricular (LV) filling and emptying patterns. Some experienced diastolic abnormalities, potentially due to relaxation issues or right-sided overload.
Area of Science:
- Cardiology
- Hematology
- Physiology
Background:
- Chronic anemia, particularly beta thalassemia, can affect cardiovascular function.
- Left ventricular (LV) performance is crucial for maintaining adequate circulation.
Purpose of the Study:
- To investigate the patterns of left ventricular (LV) filling and emptying in patients with chronic anemia due to beta thalassemia.
- To compare LV systolic and diastolic performance between beta thalassemia patients and healthy individuals.
Main Methods:
- M-mode echocardiograms were performed on 17 patients with beta thalassemia and 8 normal subjects.
- Digitization and computer analysis of echocardiographic tracings were used to assess LV performance.
Main Results:
- Patients with beta thalassemia exhibited increased LV diameter.
- LV systolic emptying rate, pattern, and timing were normal or enhanced, especially in thalassemia major.
- Peak LV filling rate and early diastolic filling were generally normal or increased, though 3 patients showed diastolic abnormalities.
Conclusions:
- Left ventricular (LV) systolic function is typically preserved or enhanced in beta thalassemia.
- Diastolic dysfunction may occur in a subset of patients, possibly related to impaired relaxation or hemodynamic changes from right-sided overload.
Abstract:
Patterns of left ventricular (LV) filling and emptying were studied in 17 patients with chronic anemia due to beta thalassemia and in 8 normal subjects. M-mode echocardiograms were recorded in each patient and digitization and computer analysis of the tracings provided data relating to the systolic and diastolic performance of the LV. LV diameter was increased. The rate, pattern and time relationships of LV systolic emptying were normal or increased in patients with thalassemia especially in those with thalassemia major requiring a large number of blood transfusions. Peak LV filling rate and the time course of early diastolic ventricular filling were also normal or increased in most patients but an abnormality of diastole was present in 3; this may have been due to abnormal early diastolic relaxation or to right-sided overload altering the LV filling pattern.