scholarly journals The Impact of Delivery Type on Ventricular Performances of Healthy Neonates

2019 ◽  
pp. 1
Author(s):  
Erman Cilsal
Keyword(s):  
Relaxation Time ◽  
Cesarean Section ◽  
Right Ventricle ◽  
Doppler Echocardiography ◽  
Performance Index ◽  
Tissue Doppler ◽  
Myocardial Performance ◽  
Isovolumic Relaxation Time ◽  
Cardiac Functions ◽  
Isovolumic Relaxation

<p><strong>Objective:</strong> The present study aims to evaluate how the mode of delivery affects the alterations in myocar­dial functions of healthy newborns within the first month of life. </p><p><strong>study desıgn:</strong> This is a prospective review of 60 healthy term newborns whose cardiac functions were examined by M-mode and tissue Doppler echocardiography on the first day of their lives and subsequently at one month of age. </p><p><strong>Results:</strong> At the first visit, the tricuspid annular plane systolic excursion was significantly higher in vaginally delivered newborns. Mitral and tricuspid E velocities and E/E’ ratio of the right ventricle and isovolumic relaxation time of right ventricle were also significantly higher in newborns delivered by cesarean section. Both of the groups had statistically similar M-mode and tissue Doppler echocardiography measurements at the time of the second visit. Only the increase in the tricuspid A velocity and myocardial performance index measured from septum between the first and second visits were significantly higher in the cesarean delivery group. When compared with the first visit, both isovolumic contraction time and isovolumic relaxation time were lower between the groups but myocardial performance index values were increased without significance at the second visit.</p><p><strong>Conclusion:</strong> Diastolic indices were significantly elevated in newborns delivered by cesarean section than neonates delivered by vaginal route. After one-month-long follow up, an increase was observed in diastolic ventricle functions of the vaginally delivered newborns but this increase was statistically insignificant. Cesarean delivery might be associated with the impairment in ventricular functions and, thus, a delay in the improvement and maturation of cardiac functions.</p>

Deterioration in peak systolic velocity is closely related to ischaemia during angioplasty: a vectorcardiographic and tissue Doppler imaging study

2000 ◽  
Vol 100 (2) ◽  
pp. 137-143 ◽  
Author(s):  
Jens JENSEN ◽  
Lars-Åke BRODIN ◽  
Britta LIND ◽  
Sven V. ERIKSSON ◽  
Mats JENSEN-URSTAD ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Left Ventricle ◽  
Doppler Echocardiography ◽  
Coronary Angioplasty ◽  
Peak Systolic Velocity ◽  
Tissue Doppler ◽  
Tissue Doppler Echocardiography ◽  
Isovolumic Relaxation Time ◽  
Vector Magnitude ◽  
Isovolumic Relaxation

We tested the hypothesis that the extent of signs of ischaemia detected by vectorcardiography (VCG) during elective coronary angioplasty (percutaneous transluminal coronary angioplasty; PTCA) is related to systolic and diastolic myocardial velocities, as determined by tissue Doppler echocardiography. A total of 15 patients undergoing PTCA (12 men/three women; age 61±9 years), without prior myocardial infarction and with an ejection fraction of > 50%, were included. The balloon inflation was repeated three times, with minimum intervals of 2 min between inflations. Tissue Doppler echocardiography was performed, in an apical two- or four-chamber view, before and at the end of each inflation. Peak systolic velocity, time-to-peak systolic velocity (TTP), peak early (Em) and late (Am) diastolic velocities, the Em/Am ratio and isovolumic relaxation time were measured in the basal segments of the left ventricle. VCG recordings were carried out during the whole procedure. ST vector magnitude (ST-VM) and ST change vector magnitude (STC-VM) were monitored. The total duration and area of each VCG change during inflation were calculated for each patient. Isovolumic relaxation time, peak Em and Am values and the Em/Am ratio did not change significantly during inflation. Peak systolic velocity decreased (6.7±2.0 to 5.3±1.9 cm/s; P < 0.001) and TTP increased (157±60 to 192±60 ms; P < 0.01) during inflation. Both STC-VM time (r = -0.68, P < 0.01) and STC-VM area (r = -0.68, P < 0.01) were related to peak systolic velocity during inflation. STC-VM time was also related (r = 0.55, P < 0.05) to the difference in peak systolic velocity during compared with before inflation. ST-VM was less closely related to peak systolic velocity. Thus the duration and degree of ischaemia, as measured by VCG, are related to peak systolic velocity in the basal segments of the left ventricle.

scholarly journals Abnormal myocardial performance index in M-mode color tissue Doppler-echocardiography

2020 ◽  
Vol 26 (1) ◽  
pp. 36-43
Author(s):  
Andrey Ivanov ◽  
Nikolay Runev ◽  
Emil Manov ◽  
Elisaveta Levunlieva
Keyword(s):  
Doppler Echocardiography ◽  
Performance Index ◽  
Tissue Doppler ◽  
Left Ventricular ◽  
Myocardial Performance Index ◽  
Tissue Doppler Echocardiography ◽  
Myocardial Performance ◽  
Pulsed Doppler ◽  
Pulsed Doppler Echocardiography ◽  
Color Tissue Doppler

The myocardial performance index (MPI) is used for global systolic-diastolic left ventricular function and prognosis assessment in patients with heart disease, allowing assessment of the patient‘s current condition and disease development follow-up. The classic method of calculation is pulsed Doppler echocardiography. The aim of the study was to evaluate the correlation of myocardial performance index with established left ventricular systolic and diastolic function indices and to determine cut-off values of the myocardial performance index in M-mode color tissue Doppler echocardiography through the aortic and mitral valves predicting abnormal myocardial performance index by pulsed Doppler echocardiography. One hundred and fi ve subjects were studied, including 30 healthy controls, 45 hypertensive patients, and 30 patients with CHD. MPI was calculated using pulsed Doppler (MPIPW) and M-mode color tissue Doppler echocardiography through the aortic (MPIAO1 and MPIAO2) and mitral (MPIMV) valves. In all patients, the myocardial performance index showed a low to moderatenegative correlation with the left ventricular ejection fraction, and the correlation with the diastolic function indices was moderate to high. In healthy persons, the correlations were not signifi cant in almost all comparisons. The MPIAO1, MPIAO2,and MPIMV values predicting abnormal MPI by pulsed Doppler (MPIPW ≥ 0.50) are MPIAO1 ≥ 0.578, MPIAO2 ≥ 0.446, and MPIMV ≥ 0.552. The cut-off values of MPI by M-mode color tissue Doppler echocardiography through the aortic and mitral valve obtained can be used for global left ventricular function assessment in patients with heart disease. Further studies, on a larger number of patients, are necessary to estimate the predictive value of the parameters established.

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