IntroductionCardiac catheterization is widely considered the “gold standard” for the diagnosis of pulmonary hypertension. However, its routine use is limited due to its invasive nature. Therefore, the aim of this study was to evaluate the correlation between pulmonary artery pressures obtained by various parameters of transthoracic echocardiography and cardiac catheterization.MethodsThis study includes 50 consecutive patients with intracardiac shunt lesions diagnosed with severe pulmonary hypertension on echocardiography and admitted for cardiac catheterization at the National Institute of Cardiovascular Diseases (NICVD) in Karachi, Pakistan. Cardiac catheterization and transthoracic echocardiography were performed in all patients simultaneously and systolic (sPAP) and mean pulmonary artery pressure (mPAP) were assessed with both modalities. Correlations and agreement, in terms of Bland-Altman plot, were computed between both modalities for sPAP and mPAP.ResultsOut of 50 patients, 46% (23) were male and mean age was 7.49 ± 4.45 years. On cardiac catheterization, sPAP was 93.92 ± 17.91 mmHg and mPAP was 67.0 ± 14.28 mmHg. Correlation between cardiac catheterization and echocardiography for the assessment of sPAP was 0.917 (p<0.001), and mPAP was 0.832 (p<0.001) for mean gradient of tricuspid regurgitation (PGTRmean), 0.749 (p<0.001) for peak gradient of pulmonary regurgitation (PGPRpeak), 0.691 (p<0.001) for Acceleration time across right ventricular outflow tract (RVOT), and 0.752 (p<0.001) for end gradient of pulmonary regurgitation (PGPRend). Bland-Altman plot showed moderate agreement between two modalities.ConclusionA positive but modest correlation was observed between hemodynamic parameters of transthoracic echocardiography and cardiac catheterization for assessment of pulmonary artery pressures. Transthoracic echocardiography can reliably be used as an initial non-invasive modality for the assessment of pulmonary artery hypertension and can obviate the need of right heart catheterization in some patient especially with mild pulmonary hypertension.
Background Transthoracic echocardiography (TTE) plays a vital role in the assessment of the surgical management of patients with tetralogy of Fallot (TOF). Accurate assessment of the main pulmonary valve annulus, main pulmonary artery (MPA), and branch pulmonary arteries are crucial for decision-making regarding the surgical approach in the form of total correction. It is also important for performing a systemic-to-pulmonary artery shunt operation and affects the outcome. In some patients with poor echogenic windows, it is sometimes difficult to obtain accurate measurements. Cardiac computed tomographic angiography (CTA) can be a superior diagnostic modality. Therefore, the aim of this study was to evaluate the degree of agreement between TTE and CTA in assessing the main pulmonary valve annulus and the size of the MPA and its branches among patients with TOF patients.
Objective: To analyze children of congenital heart defect hospitalized with lower respiratory tract infections (LRTIs). Study Design: Cohort study. Setting: Department of Pediatrics, Rai Medical College Teaching Hospital, Sargodha Pakistan. Period: July 2021 to June 2022. Material & Methods: Echocardiography confirmed known CHD cases of both genders aged 1 month to 10 years and hospitalized with LRTI were included. Demographic and clinical data were noted while relevant radiological examination and bacterial culture / respiratory virus panel from nasopharayngeal swabs examined. Types of CHD (acyanotic or cyanotic), types of bacterial causative agents and outcomes in terms of duration of hospitalization (days) and mortality or discharged were noted. Results: In a total of 63 children, 34 (54.0%) were male. The mean age was 1.56±1.42 years while 46 (73.0%) children were aged below 1 year. Assessment of causative agents revealed that 9 (14.3%) had viral involvement, 8 (12.7%) bacterial agents. Majority of the children, 44 (69.8%) had acyanotic CHD while remaining 19 (30.2%) had cyanotic CHD. Need for pediatric intensive care unit (PICU) admission was noted in 22 (34.9%). Although, need for PICU stay was more among children with acyanotic CHD when compared to cyanotic CHD, but the difference did not reach statistical significance (40.9% vs. 21.1%, p=0.1292). Likewise, duration of hospitalization was relatively more among children with acyanotic CHD when compared to children with cyanotic CHD but the difference did not reach statistical significance (17.65±8.21 vs. 14.3±6.84, p=0.1243). Conclusion: Majority of the children with CHD hospitalized with LRTI were below 1 year of age. Acyanotic CHD was the most common CHD type. Mortality was relatively low and most of the children with CHD hospitalized with LRTI were treated and discharged successfully.
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