|Echocardiographic Assessment of Right Atrial Volume Index in Acute Inferior Myocardial Infarction Patients|
|Mehrnoush Toufan Tabrizi1, Najmeh Reshadati1, Ahmad Separham1, Afshin Habibzadeh2, Kambiz Parazaran3|
|1Department of Cardiology,Tabriz University of Medical Sciences, Tabriz, Iran
2Department of Internal Medicine,Ardabil University of Medical Sciences, Ardabil, Iran
3Department of Cardiology, University of social welfare and rehabilitation sciences, Tehran, Iran
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Keywords : Inferior myocardial infarction, Echocardiography, Right atrial volume index, Right ventricle dysfunction
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Objectives: Acute myocardial infarction (AMI) can cause right ventricle (RV) dysfunction. The electrocardiography (ECHO) can provide the first cause to RV involvement in patients with inferior MI. In these patients who ECG is not diagnostic for RV involvement, echocardiographic assessment of RV function can help in early diagnosis and management of these patients. On the other hand ,due to anatomical position and shape of RV, Precise echo assessment of RV systolic function is challenging and additional parameters are needed for diagnosis.
Materials and Methods:We included 116 patients with inferior MI (66 with isolated inferior and 50 with infero RV MI) after 24 hours after MI until 72 hours after MI. RV systolic function parameters including Tricuspid annular plane systolic excursion (TAPSE), RV FAC (Fractional area change), Peak systolic velocity of tricuspid annulus at TDI mode (RV Sm )were measured.Method that used for measurement of RV volume index in these patients are Monoplane Simpson’s method and biplane area length method.
Results: As expected,RA volume index was high in both inferior and infero RV MI patients but was significantly higher in infero RV MI. Patients with infero RV MI patients , compared to isolated inferior MI, more likely have RAEF≤35%, high E/E’, and high Right ventricular end diastolic diameter( RVEDD). The correlation between RAVI in both these groups was very significant, with E/E’ and RVEDD.
Conclusion:RA volume index, measured by both methods, is a good parameter to evaluate RV dysfunction in patients with inferior and infero RV MI. RA volume index also showed higher values in patients with infero RV MI, indicating more severe dysfunction.
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