Assessment Of Regional Myocardium Function Of Left Ventricular In Children Of Severe Pneumonia With Respiratory Failure By Speckle Tracking Imaging

Objective:In order to help children whohave been diagnosed with severe pneumonia and respiratory failure, the two-dimensional speckle tracking technology has been used to evaluate those children’s left ventricular segmental longitudinal myocardial function. Methods: Collect data from our ICU inpatients:take 31 cases of children with severe pneumonia and type I respiratory failure; 28 cases of children with severe pneumonia and type II respiratory failure, apart from this, 30 healthy children will be control group. Children with severe pneumonia andrespiratory failure need to meet requirements of inadvertently myopathy, cardiac significantly expanded over, moderate or maximum pericardial effusion, severe arrhythmia, heart disease and children with complex radiotherapy and chemotherapy treatment. Collecting left ventricular apical three-chamber heart, and apical four-chamber heart, and apical two-dimensional dynamic grayscale images chamber view, then the use of ultrasound imaging technology automatic function(AFI) to measure the left ventricular myocardial strain of the long axis of 18 segments, namely contraction peak strain rate(PSS) and contraction after contraction index(PSI). Result: 1. Three groups of infants with M-ultrasound acquisition detect groups was not statistically significant difference between Ejection Fractions(EF) and Fractional Shortening(FS) parameters(P>0.05). 2. Compared with the normal group, the PSS value of the basal and middle segment in severe pneumonia and type I respiratory failure group was lower, so the difference was statistically significant(P <0.05); 3. Severe pneumonia and type Ⅱ respiratory failure group compared with the normal group, the PSS values of the basal and middle segmentwere lower, the difference was statistically significant(P<0.05); 4. Compared with severe pneumonia andⅠrespiratory failure group, the severe pneumonia and type Ⅱ respiratory failure groupPSS values in the basal anteroseptal wall, middle posterior wall and apical posterior wall are statistically significant difference(P<0.05). 5. Severe pneumonia and respiratory failure Ⅰ group PSI> 0(median 7), and severe pneumonia and respiratory failure Ⅱ group(median 7) were significantly higher than the normal group(median 2), which means the differences between the above two groups and the normal group were statistically significant(P <0.01); Among those two groups(the severe the severe pneumonia and respiratory failure groupⅠandⅡ),the difference was not statistically significant(P> 0.05). Conclusion: 1. Children with severe pneumonia and respiratory failure have had damaged segmental cardiac function before the change of LVEF and LVFS. 2.Cardiac dysfunction segments in children who have severe pneumonia and respiratory failure can occur in any of myocardial segments. 3. 2D speckle tracking technology(AFI) is a sensitive indicator that evaluatesleft ventricular segmental longitudinal myocardial function in children who have severe pneumonia.