MRI assessment of myocardial global function by tei index - a comparison to echocardiographic tei index

Introduction The Tei index is an echocardiographic measure of global ventricular function, calculated as ((isovolumic contraction time) + (isovolumic relaxation time)) / (ejection time). This may be calculated as ((time of atrioventricular valve closure) (time of arterial valve closure)) / (time of arterial valve closure). Used as a measure of systolic as well as diastolic function, the Tei index has been validated for use in the left heart and right heart, in normal patients and those with a variety of pathologies. Measures of systolic and diastolic function by MRI, with few exceptions, are not directly comparable to echocardiographic measures.