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"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."

"Cardiac CT scanners are rapidly improving, each major vendor has introduced a state of the art scanner every 2–3 years. The basic applications, terminology and acquisition has not changed dramatically, however, improvements in hardware and software continue to reduce radiation exposure, scan times, artifacts and improve image quality. This chapter outlines the basic CT terminology, functions and background behind the current state of CT scan- ners for cardiac applications. It reviews spatial, temporal and contrast resolution limits of the CT scanners. An overview of common terms, radiation exposure and protocols are included. This acts as an introductory chapter to be expanded by subsequent chapters that will each go into more details on specific topics. Comparison to magnetic resonance for image quality and functionality, and dose comparisons to mammography, nuclear and fluoroscopy are included."

"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."

"This book provides an up-to-date introduction to the role circadian rhythms, cardiac plasticity, and mechanotransduction play in the heart, while at the same time introducing new developments in cellular, viral, and non-biologic therapies that are in the process of being developed. Importantly, the focus of this book is on topics that, due to their novelty, are largely not covered in the other major textbooks. A special emphasis is placed on the molecular basis of cardiac metabolism, new concepts in cardiac remodeling, and translational therapies and imaging techniques currently under development for clinical use. The chapters are written by experts from diverse clinical and biomedical research backgrounds. Translational cardiology : molecular basis of cardiac metabolism, cardiac remodeling, translational therapies and imaging techniques simplifies the complexity of the molecular basis of disease by focusing on patient-oriented disease mechanisms and therapies and is of great value to a broad audience including physicians (e.g. cardiologists, cardiovascular surgeons, pathologists) as well as translational biomedical researchers in a wide range of disciplines."

"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."

"Dugaan penyakit jantung secara klinis dapat diketahui salah satunya dengan mengamati fungsi otot jantung ventrikel kiri dengan teknik kardiologi nuklir. Dengan metode ini, penyumbatan pembuluh darah koroner ditentukan untuk mengetahui kondisi fungsi otot jantung penyebab iskemik atau infark. Dalam penelitian ini dievaluasi fungsi otot jantung berdasarkan hasil prosentase perfusi, total skor perfusi dan fraksi ejeksi. Subjek yang dipilih adalah 31 pasien yang menjalani pemeriksaan MPI di Rumah Sakit Angkatan Darat Gatot Soebroto Jakarta, menggunakan radiofarmaka 99mTc-sestamibi. Pemeriksaan dilakukan dengan kamera gamma SPECT dual head yang dilengkapi dengan program QPS/QGS. Akuisisi data dilakukan dengan kondisi pasien pada saat stres dan istirahat. Dari hasil evaluasi data menggunakan statistik metode Pearson dan Spearman, diperoleh untuk semua segmen menunjukan korelasi kuat-positif. Berdasarkan data nilai prosentase perfusi pada kondisi stres dan istirahat, diperoleh hasil 8 orang normal dan diperkirakan 11 orang telah mengalami iskemia parsial, 8 orang iskemia total dan 4 orang infark parsial.

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Suspicion on heart disease can be confirmed by observing the function of the left ventricle heart muscle with nuclear cardiology techniques. In this method, blockage of coronary arteries is determined by finding out the condition of heart muscle function causing ischemia or infarction. In this study, cardiac muscle function was evaluated based on the percentage of perfusion, total score of perfusion and ejection fraction. Subjects of thirty-one patients undergoing the MPI examination on Gatot Soebroto Jakarta Hospital using 99mTc-sestamibi radiopharmaceutical were chosen as samples. The examination was carried out with dual head SPECT equipped with QPS/QGS program. Data acquisitions were performed under patient's stress and rest conditions. Evaluation of the data using statistical methods of Pearson and Spearman was performed to all segments, indicating a strong correlation. As a result 11 subjects suspected for having partial ischemia, 8 subjects for total ischemia, 4 subjects for partial infarction, while the remainder 8 subjects normal."

"ABSTRAK Latar belakang: Kardiomiopati akibat kelebihan besi masih merupakan penyebab kematian utama pada pasien thalassemia b mayor. Kardiomipati akibat kelebihan besi merupakan penyakit yang reversibel dengan pemberian kelasi besi yang ditandai dengan gejala awal gangguan diastolik. Amino-terminal pro-brain natriuretic peptide NT-proBNP merupakan biomarker yang sensitif dalam mendeteksi disfungsi diastolik.Tujuan: Mengevaluasi nilai diagnostik NT-proBNP dalam mendeteksi hemosiderosis jantung yang dinilai dengan MRI T2 jantung.Metode: Enam puluh delapan pasien dengan thalassemia b mayor usia 10-18 tahun tanpa gejala gagal jantung menjalani pemeriksaan NT-proBNP saat sebelum transfusi darah. Semua subyek diperiksa MRI T2 Jantung dalam kurun waktu maksimal 3 bulan median 19 hari . Pasien kemudian dibagi menjadi kelompok hemosiderosis jantung MRI T2 jantung 20 ms .Hasil: Dari 68 pasien, didapatkan rasio lelaki : perempuan sebesar 1: 1,1 dengan usia median 14,1 tahun rentang : 10-17,8 tahun . Kadar NT-proBNP tidak berbeda bermakna antara kelompok hemosiderosis jantung dan tidak hemosiderosis jantung p-0,233 . Uji diagnosis NT-proBNP dengan nilai titik potong 160 pg/mL menghasilkan nilai sensitivitas, spesifisitas, nilai duga postif, dan nilai duga negatif secara berurutan sebesar 38,46 , 58,1 , 17,8 , dan 50 .Simpulan: Pengukuran NT-proBNP tidak dapat digunakan untuk mendeteksi hemosiderosis jantung pada anak. ABSTRACT Background Iron induced cardiomyopathy remains the leading cause of mortality in patients with thalassemia b major. Iron deposition related cardiomiopathy, which may be reversible through iron chelation, is characterized by early diastolic dysnfunction. Amino terminal pro brain natriuretic peptide NT proBNP is a sensitive biomarker of diastolic dysfunction.Aim To evaluate the diagnostic value of NT proBNP as a surrogate marker of iron overload examined with MRI T2 .Methods sixty eight b thalassemia major patients 10 18 years with no signs of heart failure underwent NT proBNP measurement before routine transfusion. All subjects were prospectively performed cardiac MRI T2 examination within three months median 19 days . Patients were divided as cardiac hemosiderosis cardiac MRI T2 20 ms Result Of 68 patients, the male to female ratio was 1 1,1 and the median age was 14.1 years range 10 17.8 years . NT proBNP levels were not different between hemosiderosis and non hemosiderosis p 0,233 . Diagnosis test using cut off value of 160 pg mL resulted in sensitivity of 38.46 , specificity of 58.1 , positive predictive value of 17.8 , and negative predictive value of 50 .Conclusion NT proBNP cannot be used to detect cardiac hemosiderosis in adolescent."

"Latar Belakang: Telah diketahui infeksi COVID-19 dapat menetap menjadi sindroma pasca COVID-19. Magnetic Resonance Imaging (MRI) kardiak memiliki nilai diagnostik tinggi untuk menilai karakteristik jaringan miokard. Belum diketahui secara pasti efek jangka panjang COVID-19 terhadap jaringan miokardium serta faktor-faktor admisi yang memiliki pengaruh terhadap prevalensi sindroma pasca-COVID-19 pada populasi dengan penyakit kardiovaskular. Tujuan: Mengevaluasi prevalensi fibrosis miokardium dengan MRI kardiak pada pasien dengan penyakit kardiovaskular dan riwayat COVID-19 1 tahun pascaperawatan, serta mengidentifikasi faktor admisi yang berpengaruh terhadap fibrosis miokardium. Metode: Kohort prospektif dengan menilai parameter MRI kardiak pada pasien terkonfirmasi COVID-19 dengan penyakit kardiovaskular 1 tahun pascaperawatan. Selanjutnya, dilakukan analisa temuan MRI kardiak terhadap kelompok kontrol tanpa riwayat COVID-19 yang telah di-matching berdasarkan umur, jenis kelamin, dan faktor resiko. Analisa multivariat dilakukan untuk mengetahui faktor admisi yang memiliki hubungan dengan kejadian fibrosis miokardium. Hasil: Total 32 subjek dengan penyakit KV dan riwayat COVID-19 1 tahun pascaperawatan dengan 49 subjek kontrol disertakan dalam studi ini. Terdapat peningkatan yang signifikan pada parameter MRI kardiak yaitu proporsi abnormal T1 relaxation time (65,5% vs 36,7%; p-value=0,011) serta late gadolinum enhancement (LGE) skar noniskemik 62,5% vs 29,8%;p-value=<0,001) pada kelompok dengan riwayat COVID-19 dibanding kontrol. Tidak ditemukan faktor admisi yang berpengaruh terhadap peningkatan LGE noniskemik/T1 abnormal. Kesimpulan: Terdapat peningkatan prevalensi fibrosis miokardium pada pasien dengan penyakit KV dan riwayat COVID-19 1 tahun pascaperawatan dibanding kontrol dinilai melalui MRI kardiak. Tidak terdapat hubungan antara faktor admisi dengan fibrosis miokardium 1 tahun pascaperawatan COVID-19.

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Background: Presently, it has been acknowledged that COVID-19 infection may persist longer as Post-acute COVID-19 Syndrome. Cardiac Magnetic Resonance Imaging (cMRI) possesses a high diagnostic value to evaluate myocardial tissue characteristics. Data are still limited regarding longer implications of COVID-19 infection towards myocardial tissues and predictive admission factors in patients with Cardiovascular Diseases (CVD).

Aim(s): To evaluate the prevalences of myocardial fibrosis using cMRI in patients with CVD and one year post-COVID-19 hospitalization and identifying admission factors in correlation with myocardial fibrosis. 

Method(s): Prospective cohort to assess cMRI parameters in patients with CVD and history of COVID-19 one year post-hospitalization. The results were then compared with the age-, sex-, risk factors-matched control group without prior of COVID-19 infection. Lastly, multivariat analysis was done to identify relations between admission factors and myocardial fibrosis. 

Result(s): A total of 32 subjects with CVD one year post-COVID-19 hospitalization and 49 controls were included in this study. Significant increases of cMRI parameters, namely abnormal T1 relaxation time (65.5% vs 36.7%; p-value=0.011) and non-ischemic late gadolinum enhancement (LGE) (62.5% vs 29.8%;p-value=<0.001) were observed in the population with prior COVID-19 infection compared to control. No admission factors were found to be related with the increases in nonischemic LGE/abnormal T1.

Conclusion: There is a significant increase of myocardial fibrosis prevalence in patients with CVD one year post-COVID-19 hospitalization compared to control assessed through cMRI parameters. No relationships were found between admission factors and myocardial fibrosis. "

"Latar Belakang: Harapan hidup pasien thalasemia bergantung transfusi bertambah baik karena transfusi darah dan terapi kelasi besi yang sesuai. Penyakit jantung akibat toksisitas besi tetap menjadi penyebab utama kematian pada pasien thalasemia bergantung transfusi. MRI T2* jantung dapat mendeteksi dini toksisitas besi di jantung dan dapat mengevaluasi hasil pengobatan dengan membandingkan nilai T2* pra dan pasca terapi kelasi besi.Tujuan Penelitian: Penelitian ini bertujuan mendapatkan profil perbaikan toksisitas besi di jantung pada pasien thalasemia dewasa bergantung transfusi. Penelitian ini juga bertujuan untuk melihat kesesuaian antara perbaikan nilai T2* jantung dengan perbaikan feritin serum dan saturasi transferin.Metode Penelitian: pre and post test dengan data sekunder retrospektif pada pasien dewasa thalasemia bergantung transfusi yang kontrol di poliklinik thalasemia Kiara dan poliklinik dewasa hematologi-onkologi medik RSUPN Cipto Mangukusumo. Penelitian dilakukan pada bulan Juli-Desember 2019. Data sekunder diperoleh dari rekam medis dan registri pasien thalasemia berupa riwayat medis, jenis obat kelasi besi, nilai T2* jantung satu tahun berturut-turut, kadar feritin serum dan saturasi transferin. Analisis data berupa data deskriptif dan uji marginal homogeneity serta uji kappa.Hasil: Sebanyak 115 pasien dilibatkan dalam penelitian ini. Terdapat perbaikan T2* jantung sebanyak 7,0% dan menetap baik (T2* jantung tetap >20 milidetik) sebanyak 72,2%. Tidak terdapat kesesuaian antara perbaikan nilai T2* jantung dengan perbaikan feritin serum (nilai kappa = 0,044) dan perbaikan nilai T2* jantung dengan saturasi transferin ( nilai kappa = 0,011).Simpulan: Perbaikan toksisitas besi di jantung pasca terapi kelasi besi sebanyak 7,0% dan menetap baik sebanyak 72,2%. Tidak terdapat kesesuaian antara perbaikan nilai T2* jantung dengan perbaikan kadar feritin serum dan saturasi transferin.

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Background: Life expectancy of the transfusion dependent thalassemia patients is getting better because of blood transfusion and appropriate iron chelation therapy. Heart disease due to iron toxicity remains the leading cause of death in thalassemia patients who need transfusion. MRI T2* can allow to detect premature iron toxicity in the heart and can evaluate the results by comparing myocardial T2* pre and post iron chelation therapy.Objectives: This study aims to obtain a profile of improvement in cardiac iron toxicity in adult thalassemia patients who need transfusion. This study also supports to see aggrement between improvement in myocardial T2* with improved serum ferritin level and transferrin saturation.Methods: pre and post test with retrospective secondary data in adult thalassemia patients requiring controlled transfusions in Kiara thalassemia clinic and hematology-medical oncology clinic Cipto Mangukusumo General Hospital. The study was conducted in July-Desember 2019. Data were obtained from medical records and thalassemia registry, which consisted of medical history, type of chelation, myocardial T2* within one year, serum ferritin level and transferrin saturation. Data analysis was performed in descriptive data and marginal homogeneity test and Kappa test.Results: A total of 115 patients were included in this study. There was an improvement of a myocardial T2* in 7.0% patients and persistently good (myocardial T2* remains >20 milliseconds) in 72.2%. There was no agreement between improvement in myocardial T2* with improvement in serum ferritin level (kappa value 0.044) and improvement in myocardial T2* with transferrin saturation (kappa value 0.011).Conclusion: Improvement of cardiac iron toxicity after iron chelation therapy was 7.0% and persistently good in 72.2%. There was no agreement between the improvement in myocardial T2* with improvement in serum ferritin level and transferrin saturation."