Systolic time intervals and its relation to intraventricular dyssynchrony of the left ventricle in patients with dilated cardiomyopathy a speckle-tracking study

Aim To assess the value of systolic time intervals [as simple echocardiographic parameters of left ventricle (LV) systolic performance] and its relation to intraventricular dyssynchrony (by speckle tracking) of the LV in patients with dilated cardiomyopathy. Patients and methods All the studied indi...

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Published inThe scientific journal of al-Azhar Medical Faculty (Girls) : bulletin issued by Scientific Society of Faculty of Medicine for Girls Vol. 5; no. 2; pp. 499 - 504
Main Author Hasan, Asmaa Ahmed Ali
Format Journal Article
LanguageEnglish
Published Medknow Publications and Media Pvt. Ltd 01.04.2021
Subjects
Cardiomyopathy, Dilated
Complications and side effects
Diagnosis
Echocardiography
Risk factors
Ventricular fibrillation
Egypt
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Summary:Aim To assess the value of systolic time intervals [as simple echocardiographic parameters of left ventricle (LV) systolic performance] and its relation to intraventricular dyssynchrony (by speckle tracking) of the LV in patients with dilated cardiomyopathy. Patients and methods All the studied individuals were subjected to ECG and transthoracic echocardiography to measure LV dimensions and systolic function by conventional and speckle-tracking echo. Left ventricular pre-ejection time (LVPET), left ventricular ejection time (LVET), and the ratio of LVPET to LVET were also measured (LVPET/LVET). Two-dimensional strain to measure time to peak negative strain value of the LV segments was averaged to calculate TPS-SD. Results The enrolled population were 153 cases, divided into 123 patients and 30 normal individuals. There was a significant lower LV global longitudinal strain % in the patient group. Moreover, insignificant shorter LVET was seen in the patients. LVET had an inversely significant correlation with QRS duration and dyssynchrony index. The LVPET and PET/LVET ratio had a significant linear correlation with QRS duration and dyssynchrony index measured by two-dimensional strain ( r =0.4, P <0.01). Conclusion Systolic time interval can be easily and accurately measured in patients with DCM and may be considered as an indicator for presence of LV intraventricular dyssynchrony.
ISSN:1110-2381
DOI:10.4103/sjamf.sjamf_96_21