Hasil Pencarian  ::  Simpan CSV :: Kembali

"Sejak didemonstrasikan adanya pengaruh potensial induksi arus listrik pada tulang awal tahun 1950 (15), kecenderungan untuk melakukan penelitian pengaruh bioelectric pada proses penyembuhan patah tulang dan pengaruh rangsangan listrik pada frakture non union dan pseudoarthrosis (6,7), sangat tinggi. Tetapi, penelitian tentang pengaruh arus listrik pada proses penyembuhan jaringan lunak sangat sedikit dilakukan. Pengaruh Piezoelectric yang hampir sama pada tulang tampak juga pada tulang rawan dan tendon (1,2,4) dan medan listrik juga ditemukan pada proses polarisasi sel (9). Penulis lain mengatakan bahwa rangsangan arus listrik juga mempunyai pengaruh pada proses penyembuhan saraf dan jaringan lunak pada binatang percobaan (5,14). Frank dan kawan-kawan (8) meneliti pengaruh rangsangan elektromagnet pada proses penyembuhan ligamen collateral medial pada kelinci dan mendapatkan hasil meningkatnya kecepatan kesembuhan luka dan peningkatan kekuatan lentur pada ligamen tersebut. Stanish (11) berdasarkan penemuannya menduga bahwa pengaruh arus listrik akan meningkatkan kekuatan robekan tendon patela pada anjing pecobaan. Atas dasar inilah kami mencoba melakukan penelitian pengaruh aliran listrik terhadap penyembuhan tendon dengan menggunakan kelinci sebagai binatang percobaan."

"Tujuan penelitian ini untuk melihat karakteristik elektrofisiologi dan hasil ablasi frekuensi radio (AFR) pada flutter atrium (FLA) yang belum tersedia hingga saat ini di Indonesia. Tiga buah kateter elektroda multipolar dimasukkan perkutan ke dalam jantung lalu ditempatkan di sinus koronarius (SK), berkas His dan mengitari anulus trikuspid. Kateter ablasi 8 mm digunakan untuk AFR linier cavotrikuspid isthmus (CTI) pada FLA tipikal dan kebalikan tipikal. Blok bidireksional ditentukan atas dasar pemanjangan waktu konduksi dinding lateral bawah ke ostium SK dan sebaliknya lebih dari 90 mdet, dan/atau dengan cara pemacuan diferensial. Terdapat 27 subyek dengan 30 FLA terdokumentasi yang terdiri dari 19 tipikal, 5 tipikal terbalik dan 6 atipikal. Hanya 9 pasien yang tidak mempunyai penyakit jantung struktural. Rerata panjang siklus takikardia (PST) adalah 261,79 ± 42,84, 226,5 ± 41,23, dan 195,4 ± 9,19 mdet masing-masing untuk FLA tipikal, kebalikan tipikal dan atipikal (p = 0,016). Konduksi CTI menempati 60% dari PST atau rerata 153,0 ± 67,37 mdet. Aktivasi SK terbagi menjadi 3 jenis yaitu proksimal ke distal, distal ke proksimal dan fusi. AFR pada FLA tipikal dan tipikal terbalik sukses sebanyak 96 % dengan tingkat kekambuhan 4,5 % pada rerata masa pengamatan 13 ± 8 bulan. Pada populasi penelitian ini jenis FLA terbanyak adalah FLA tipikal. Kebanyakan subyek menderita penyakit jantung struktural. AFR sangat efektif menyembuhkan FLA tipikal dan kebalikan tipikal. (Med J Indones 2007; 16:151-8)

---

This study aimed to elaborate the electrophysiology characteristics and radiofrequency ablation (RFA) results of atrial flutter (AFL) which has not been established in Indonesia. Three multipolar catheters were inserted percutaneously and positioned into coronary sinus (CS), His bundle area and around tricuspid annulus. Eight mm ablation catheter was used to make linear ablation at CTI of typical and reverse typical AFL. Bidirectional block was confirmed by conduction time prolongation of more than 90 msec from low lateral to CS ostium and vice versa, and/or by means of differential pacing. Thirty AFL from 27 patients comprised of 19 typical AFL, 5 reverse typical AFL and 6 atypical AFL enrolled the study. Mean tachycardia cycle length (TCL) were 261.8 ± 42.84, 226.5 ± 41.23, and 195.4 ± 9.19 msec, respectively (p = 0.016). CTI conduction time occupied up to 60% of TCL with mean conduction time of 153.0 ± 67.37 msec. CS activation distributed to three categories which comprised of proximal to distal, distal to proximal and fusion activation. Only nine of 27 patients had no structural heart disease. RFA of symptomatic typical and reverse typical AFL demonstrated 96% success and 4.5 % recurrence rate during 13 ± 8 months follow up. Typical AFL is the predominant type of AFL in our population. The majority of AFL cases suffered from structural heart disease. RFA was highly effective to cure typical and reverse typical AFL. (Med J Indones 2007; 16:151-8)"

"This book compiles new findings from the work of internationally renowned experts in plant electrophysiology, biophysics, bioelectrochemistry, ion channels, membrane transport, imaging of water transport, photosynthesis, mechanosensors, osmotic motors, sensing and actuation in plants. First volume covers modern methods in plant electrophysiology and cell electrophysiology. Second volume deals with signal transduction and responses in plants."

"Provides a comprehensive and up-to-date overview of the current state of knowledge on electrical signaling and responses in plant physiology. It covers a significant interdisciplinary area for a broad range of researchers, emphasizing the physical, chemical, biological, and technological aspects of plant electrophysiology, while also demonstrating the role of electrochemical processes and ion channels in plant life cycles. Separate chapters describe the electrophysiology of the venus flytrap, the telegraph plant, mimosa pudica, and other interesting plant species. Subsequent sections focus on mechanisms of plant movement, the role of ion channels, morphing structures, and the effects of electrical signal transduction on photosynthesis and respiration. Further topics include the electrophysiology of plant-insect interactions, how plants sense different environmental stresses and stimuli, and how phytoactuators respond to them. All chapters analyze the generation and transmission of electrical signals in plants."

"Cardiac arrhythmias are a major cause of death (7 million cases annually worldwide; 400,000 in the U.S. alone) and disability. Yet, a noninvasive imaging modality to identify patients at risk, provide accurate diagnosis and guide therapy is not yet available in clinical practice. Nevertheless, there are various applications of electrophysiologic imaging in humans from ECG/CT reconstructions, MRI to tissue Doppler investigations that provide supplimentary diagnostic data to the cardiologist. EP laboratories are experiencing an increase in volume, for both diagnostic and interventional electrophysiology studies, including mapping, ablation, and pacemaker implants. The equipment requirements for these procedures are stringent, include positioning capabilities, and dose management. This book is designed to review all of the current imaging methodologies that assist in diagnosis within the electrophysiology department."