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Abstrak :
Questo libro intende presentare, in maniera immediata ed efficace, le complesse nozioni di base dell’emodinamica vascolare e della sua fisiopatologia, sottolineando l’importanza delle proprietà meccaniche delle grandi arterie nella genesi della pressione arteriosa. Con l’ausilio di numerose immagini e con linguaggio accessibile, il lettore è guidato alla scoperta degli elementi che determinano la pressione arteriosa, familiarizzando con i concetti di stiffness arteriosa, velocità dell’onda di polso, pressione centrale, onde riflesse e amplificazione della pressione.

Abstrak :
Latar belakang. Hipertensi pulmonal merupakan salah satu komplikasi jangka panjang pada stenosis mitral, dan meningkatkan morbiditas serta mortalitas. Peningkatan resistensi vaskular paru terjadi pada fase reaktif hipertensi pulmonal akibat stenosis mitral. Pada hipertensi pulmonal terjadi gangguan keseimbangan sistem otonom, yang berpengaruh pada perubahan laju jantung saat uji latih. Laju jantung pemulihan dihitung dari selisih laju jantung maksimal saat uji latih dengan laju jantung menit pertama fase pemulihan dipengaruhi oleh reaktivasi sistem parasimpatis saat akhir latihan, dan merupakan prediktor mortalitas jangka panjang. Metode. Penelitian ini dilakukan pada 20 pasien stenosis mitral bermakna dengan hipertensi pulmonal yang menjalani pembedahan katup mitral di Pusat Jantung Nasional Harapan Kita dari bulan Agustus hingga November 2014. Dilakukan pengukuran resistensi vaskular paru sebelum operasi dan sebelum pasien dipulangkan. Laju jantung pemulihan diambil dari uji treadmil pada akhir program rehabilitasi kardiak fase 2. Dilakukan analisa statistik untuk mencari hubungan antara resistensi vaskular paru dengan laju jantung pemulihan saat latihan pasca operasi katup mitral. Hasil. Laju jantung pemulihan yang diukur pada menit pertama fase pemulihan uji treadmill adalah 11,5 + 5,9 kali per menit, dan perubahan resistensi vaskular paru pre dan paska operasi sebesar 1,55 + 2,1 WU. Laju jantung pemulihan menit pertama memiliki korelasi sedang dengan perubahan resistensi vaskular paru (r 0,537; p 0,015) . Analisa regresi linier laju jantung pemulihan menit pertama dengan perubahan resistensi vaskular paru pre dan paska operasi mendapatkan nilai koefisien β 1,52 dengan IK 95% 0,338-2,706 dengan nilai p 0,015. Analisa bivariat menyimpulkan bahwa digoxin merupakan variabel perancu (p 0,048). Analisa regresi linier antara perubahanresistensi vaskular paru pasca operasidengan laju jantung pemulihan menit pertama(adjusted analysis sesuai variable perancu)menunjukkan nilai koefisien β 1,244 dengan IK 95% 0,032-2,457 dengan nilai p 0,045. Kesimpulan. Perubahan resistensi vaskular paru pada pasien stenosis mitral dengan hipertensi pulmonal yang menjalani pembedahan berhubungan dengan laju jantung pemulihan menit pertama saat uji latih jantung.

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Background. Pulmonary hypertension is one of the long-term complication of mitral stenosis, resulting increase of morbidity and mortality. Pulmonary vascular resistance (PVR) is increase in reactive phase of pulmonary hypertension due to mitral stenosis. There is impaired autonom regulation following pulmonary hypertension, affecting heart rate changes during exercise test. Heart rate recovery (HRR) is defined as the difference between heart rate at peak exercise and 1 minute of recovery phase. It is affected by reactivation of parasympathetic system after cessation of exercise, and has been known as a long-term mortality predictor. Method. A study of 20 patients with significant mitral stenosis with pulmonary hypertension who underwent mitral valve surgery in National Cardiovascular Center Harapan Kita was done from August to November 2014. PVR data from echocardiography was measured before surgery and before the patients were discharged. HRR data was taken from the treadmill test at the end of phase 2 cardiac rehabilitation program. Statistical analysis is done to explore the correlation between pulmonary vascular resistance and heart rate recovery after exercise test. Result. Mean heart rate recovery after exercise test is 11,5 + 5,9 beat perminute, and changes of pulmonary vascular resistance after surgery is 1,55+2,1 WU. There was a correlation between change of PVR and heart rate recovery (r 0,537; p 0,015). Linear regression analysis of the change of PVR and heart rate recovery (unadjusted analysis) showed β coefficient 1,52 with 95% confidence interval 0,338-2,706 and p 0,015. Adjusted analysis to confounding variabel showed β coefficient 1,244 with 95% CI 0,032-2,457 and p 0,045. Conclusion. Changes of pulmonary vascular resistance after mitral valve surgery in mitral stenosis pastient is positively correlated with heart rate recovery during exercise test.

Abstrak :
Latar Belakang: Salah satu tata laksana revaskularisasi pada Penyakit jantung koroner (PJK) adalah bedah pintas arteri koroner (BPAK). Salah satu teknik BPAK menggunakan mesin pintas jantung paru (PJP) yang dapat menyebabkan reaksi inflamasi sehingga terjadi penurunan tahanan vaskular sistemik (TVS) sehingga meningkatkan mortalitas dan morbiditas. Glutamin adalah asam amino non esensial yang dapat menjadi esensial kondisional pada keadaan kritis dan memiliki peran membantu regulasi tonus endotel. Metodologi: Penelitian ini merupakan studi observasional analitik dengan desain penelitian kohort retrospektif. Sampel dipilih secara metode consecutive sampling dan metode randomisasi blok. Variabel-variabel yang diperiksa dilakukan uji normalitas. Variabel dengan sebaran normal dilakukan analisis statistik independent t-test, sedangkan variabel dengan sebaran tidak normal dilakukan analisis statistik Mann-Whitney test. Hasil: Berdasarkan hasil penelitian dapat disimpulkan bahwa pemberian glutamin preoperasi pada pasien penyakit jantung koroner dengan FE rendah yang menjalani BPAK mengalami penurunan TVS pada jam keenam pascaoperasi (p = 0,04) namun mengalami peningkatan curah jantung pada jam keenam (p = 0,015). Hasil pada jam ke-24 TVS pascaoperasi juga mengalami penurunan namun terlihat signifikan bila melihat faktor perancu -844,9+27,8 (ejeksi fraksi praoperasi)+0,4 (Kadar Glutamin Praoperasi)+14 (Umur) Adjusted R square = 21,9%. Curah jantung jam ke-24 pascaoperasi mengalami peningkatan secara signifikan tanpa melihat variabel perancu (p = 0,037) maupun dengan melihat variabel perancu umur (p = 0,003) dan FE praoprasi (p = 0,006) (adjusted r quare = 23,6%). Kesimpulan: Pada pasien dengan fraksi ejeksi rendah yang menjalani BPAK menggunakan mesin PJP, pemberian glutamin intravena praoperasi menyebabkan penurunan TVS disertai dengan peningkatan curah jantung pada pemantauan jam keenam dan jam ke-24. ...... Background: Coronary Artery Bypass Graft (CABG) is one of revascularization treatment in coronary artery disease patient. The most common CABG technique uses a cardiopulmonary bypass (CPB) machine which can cause an inflammatory reaction resulting in a decrease in systemic vascular resistance (SVR) thereby increasing mortality and morbidity. Glutamine is a non-essential amino acid that can become conditionally essential in critical situations such as systemic inflammatory respose syndrome (SIRS) and has a role in assisting the regulation of endothelial tone. Methods: This study is an analytic observational study with a retrospective cohort study design. Samples were selected by consecutive sampling method and block randomization method. The variables examined were tested for normality. Variables with normal distribution were analyzed statistically by independent t-test, while variables with abnormal distribution were analyzed by Mann-Whitney test. Each confounding variables then put together and analyzed statistically with multivariate approach. Results: Based on the results of the study, it can be concluded that preoperative administration of glutamine in patients with coronary heart disease with low ejection fraction (EF) who underwent CABG experienced a decrease in SVR at the sixth postoperative hour (p = 0.04) but increased cardiac output at the sixth hour (p = 0.015). The results at 24 hours postoperative also shows decreased SVR but were significant when looking at its confounding factors for preoperative EF (p = 0.001), preoperative glutamine levels (p = 0.01), and age (p = 0.013) (adjusted r square = 21.9%). Cardiac output at 24 hours postoperatively increased significantly regardless of confounding variables (p = 0.037) or by looking at its confounding factor; age (p = 0.003) and preoperative EF (p = 0.006) (adjusted r square = 23.6%). Conclussion: In patients with low EF undergoing CABG with CPB, intravenous glutamin administration can decrease SVR and increase cardiac output in 6 hours and 24 hours observation.