Background: Atrial septal defects (ASDs) are the second most common congenital lesion in adults. ASD closure is followed by symptomatic improvement and regression of pulmonary artery pressure (PAP), reduction in right heart volume overload and hence the prevalence of arrhythmias, thus quantification of the RV function is an important prognostic factor. Tissue Doppler and strain imaging are helpful tools for the assessment of RV systolic and diastolic function.
Results:At the 1 year follow up of transcatheter ASD closure, the RVEDD had decreased from 22.93±5.889 mm to 18±4.06 mm(P=0.000), and the LVEDD had increased from 33.23±5.393 mm to 36.27±6.75 mm(P=0.001). Mean PAP decreased from 18.37±4.796 mmHg to 14.77±4.75 mmHg (P=0.022). RVSP decreased from 28.9±4.425 mmHg to 15.83±4.17 mmHg (P=0.000). Regarding electrocardiography, the P wave duration decreased from 107.13±19.62 ms to 77±14.18 ms (P=0.000) and the PR interval decreased from 177.97±21.932 ms to 160.33±26.06 ms (P=0.000).The QRS duration decreased from 134.40± 4.97 ms to a mean of 119.87±4.12 ms (P=0.000). All the patients had normal sinus rhythm before closure and no one developed arrhythmia until 1 year after closure. 50 % of the patients had normal RV size at the 1-year follow up. Tricuspid annular velocities, longitudinal strain, and strain rate measurement showed no significant difference as compared to normal values, which suggest improvement of the RV systolic and diastolic function after transcatheter closure.
Conclusion:Transcatheter ASD closure leads to a significant improvement in heart cavity dimensions and RV function and reversal of electrical and mechanical changes. Novel parameters for assessment of RV function are promising and appear to be helpful for the assessment of RV function and its response to correction of volume
Background: Till this time even with superiority of primary percutaneous coronary intervention (pPCI) in the management of ST segment elevation myocardial infarction (STEMI), most of patients present to hospitals without pPCI facilities receive fibrinolytic therapy. The current recommendations support routine early invasive strategy within 24 hours.Objectives: we aimed at evaluating the best timing of invasive strategy within the first 24 hours.
Methods:The study was conducted on 60 STEMI patients who were referred to our center after successful thrombolysis. Patients were randomized into 2 groups: Very early invasive group (n=30): subjected to very early invasive strategy within 3 to 12 hours post thrombolysis. Early invasive group (n=30): subjected to early invasive strategy within 12 to 24 hours. The primary endpoints were the composite endpoints of major adverse cardiac events (MACEs). Secondary endpoints were achievement of TIMI III flow with MBG II or III. Safety endpoints were bleeding complications.Results: Both groups were homogenous regarding the demographic, clinical, and angiographic data before invasive strategy. TIMI III flow and MBG II or III were achieved in 83.3% of patients in the very early invasive group vs. 86.6% in the early group (P = 0.955). There was no difference between both groups regarding the composite endpoints MACEs (P= 0.667) or bleeding complications (P=0.528).
Conclusion:The study did not demonstrate a correlation between magnitude of benefit and timing of early PCI post successful thrombolysis in patients with STEMI. Thus, early invasive strategy could be scheduled depending on the logistics of the reference catheterization laboratory within 24 hours post thrombolysis.
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