ABSTRAK
Tujuan : Koreksi transatrial-transpulmonary tanpa transannular patch (TA-TP tanpaTAP) memiliki keuntungan berupa preservasi annulus katup pulmonal dan fungsiventrikel kanan, Namun sering terjadi gradien RV-PA dan pRV/LV ratio yang masihtinggi sehingga terjadi low cardiac output syndrome (LCOS). Penelitian ini bertujuanuntuk mencari batasan gradien RV-PA dan pRV/LV ratio yang merupakan nilai prediktifterbaik terhadap kejadian LCOS pascakoreksi tetralogi Fallot TA-TP tanpa TAP.Metode : Pada bulan Oktober 2012 sampai Maret 2013, sebanyak 30 pasien TF menjalanikoreksi TF TA-TP tanpa TAP (mean usia 8,37±7,90 tahun). Dilakukan pengukurangradien RV-PA dan pRV/LV ratio intraoperatif dan postoperatif di ICU. Evaluasi kejadianLCOS dilakukan selama perawatan di ICU. Sebelum pasien pulang, dilakukanpemeriksaan ekokardiografi untuk menilai gradien RV-PA, fungsi ventrikel kanan, defekseptum ventrikel residual, derajat regurgitasi katup pulmonal dan katup trikuspid.Hasil : Sebanyak 30 (100%) subjek penelitian memiliki z-value ≥ -1, menjalani koreksiTF TA-TP tanpa TAP. Mean gradien RV-PA intraoperatif adalah 21,13±10,60 mm Hgdan mean pRV/LV ratio intraoperatif adalah 0,53±0,14. Mean gradien RV-PA di ICUadalah 20,83±7,10 mmHg dan mean pRV/LV ratio di ICU adalah 0,49±0,10. Tidak terjadiLCOS pada 30 (100%) subjek penelitian sehingga tidak dapat dilakukan analisis untukmencari batasan nilai gradien RV-PA dan pRV/LV ratio sebagai nilai prediktif terbaikterhadap kejadian LCOS pascakoreksi TF TA-TP tanpa TAP. Mean gradien RV-PAsebelum subjek penelitian rawat jalan adalah 23,47±6,95 mmHg. Regurgitasi katuppulmonal ringan pada 15 (50%) subjek penelitian dan regurgitasi katup trikuspid trivialmildpada 16 (53%) subjek penelitian. Disfungsi ventrikel kanan ringan 3 (10%), sedang20 (67%) dan berat pada 7 (23%) subjek penelitian. Mean TAPSE postoperatif adalah1,03±0,19. DSV residual tidak dijumpai, aritmia tidak dijumpai, reoperasi dan mortalitastidak ada.Simpulan : Koreksi TF TA-TP tanpa TAP memberikan hasil operasi dini yang baik padapasien TF dengan z-value katup pulmonal ≥ -1, pRV/LV ratio < 0,5 dan gradien RV-PA <25 mmHg pascakoreksi.

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ABSTRACT
Objective : The benefits of the transatrial-transpulmonary (TA-TP) without transannularpatch (TAP) correction of tetralogy of Fallot (TOF) are preservation of pulmonary valveannulus and right ventricular function. However, TA-TP without TAP correction of TOFhad a higher incidence of low cardiac output syndrome (LCOS) because of the high rightventricle and pulmonary artery (RV-PA) pressure gradient and right ventricle and leftventricle pressure (pRV/LV) ratio. The purpose of this study were to analyze the cut offvalue of RV-PA pressure gradient dan pRV/LV ratio as the best predictor value forpostoperative LCOS in TA-TP without TAP correction of TOF.Methods : Between Oktober 2012 and Maret 2013, 30 patients with TOF underwent TATPwithout TAP correction (mean age 8,37±7,90 years, range 1-27 years). At the end ofcorrection, all patients underwent intraoperative direct measurement of RV-PA pressuregradient and pRV/LV ratio. The patients were evaluated for postoperative LCOS at theIntensive Care Unit (ICU). All the patients underwent echocardiographic examinationbefore hospital discharge. This included investigation of the presence RV-PA pressuregradien, RV function, residual VSD, pulmonary and tricuspid valve insufficiency.Results : Thirty patients with pulmonary valve annulus z-value ≥ -1, underwent TA-TPwithout TAP correction of TOF. Mean intraoperative RV-PA pressure gradient was21,13±10,60 mmHg and mean intraoperative pRV/LV ratio was 0,53±0,14. Mean RV-PApressure gradient measured 24 hours after correction at the ICU was 20,83±7,10 mmHgand mean pRV/LV ratio measured at 24 hours after correction at the ICU was 0,49±0,10.No patient had LCOS, we could not analyze the cut off value of RV-PA pressure gradientand pRV/LV ratio as the best predictor value for postoperative LCOS in this study. Nopatient had residual VSD. Mean RV-PA pressure gradient before hospital discharge was23,47±6,95 mmHg. Fifteen (50%) patients had mild pulmonary valve insufficiency and16 (53%) patients had trivial-mild tricuspid valve insufficiency. Three (10%) patients hadmild RV dysfunction. Postoperative mean TAPSE was 1,03±0,19. No patient hadarrhythmia, reoperation and mortality in this study.Conclusions : The TA-TP without TAP correction of TOF was applied successfully in 30patients with pulmonary valve annulus z-value ≥ -1, post-correction RV-PA pressuregradient < 25 mmHg and pRV/LV ratio < 0,5.