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Cardiac radiation

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https://www.readbyqxmd.com/read/29164383/image-quality-and-radiation-dose-of-coronary-ct-angiography-performed-with-whole-heart-coverage-ct-scanner-with-intra-cycle-motion-correction-algorithm-in-patients-with-atrial-fibrillation
#1
Daniele Andreini, Gianluca Pontone, Saima Mushtaq, Maria Elisabetta Mancini, Edoardo Conte, Marco Guglielmo, Valentina Volpato, Andrea Annoni, Andrea Baggiano, Alberto Formenti, Valentina Ditali, Marco Perchinunno, Cesare Fiorentini, Antonio L Bartorelli, Mauro Pepi
OBJECTIVES: To evaluate image quality, coronary evaluability and radiation exposure of coronary CT angiography (CCTA) performed with whole-heart coverage cardiac-CT in patients with atrial fibrillation (AF). MATERIALS AND METHODS: We prospectively enrolled 164 patients with AF who underwent a clinically indicated CCTA with a 16-cm z-axis coverage scanner. In all patients CCTA was performed using prospective ECG-triggering with targeted RR interval. We evaluated image quality, coronary evaluability and effective dose (ED)...
November 21, 2017: European Radiology
https://www.readbyqxmd.com/read/29152840/on-the-use-of-bolus-for-pacemaker-dose-measurement-and-reduction-in-radiation-therapy
#2
Huagang Yan, Fanqing Guo, Dengsong Zhu, Stefan Stryker, Sharron Trumpore, Kenneth Roberts, Susan Higgins, Ravinder Nath, Zhe Chen, Wu Liu
Special attention is required in planning and administering radiation therapy to patients with cardiac implantable electronic devices (CIEDs), such as pacemaker and defibrillator. The range of dose to CIEDs that can induce malfunction is large among CIEDs. Clinically significant defects have been reported at dose as low as 0.15 Gy. Therefore, accurate estimation of dose to CIED and dose reduction are both important even if the dose is expected to be less than the often-used 2-Gy limit. We investigated the use of bolus in in vivo dosimetry for CIEDs...
November 20, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29152614/ataxia-telangiectasia-mutated-kinase-role-in-myocardial-remodeling
#3
Patsy Thrasher, Mahipal Singh, Krishna Singh
Ataxia-telangiectasia mutated kinase (ATM) is a serine/threonine kinase. Mutations in the ATM gene cause a rare autosomal multisystemic disease known as Ataxia-telangiectasia (AT). Individuals with mutations in both copies of the ATM gene suffer from increased susceptibility to ionizing radiation, predisposition to cancer, insulin resistance, immune deficiency, and premature aging. Patients with one mutated allele make-up ~1.4 to 2% of the general population. These individuals are spared from most of the symptoms of the disease...
2017: Journal of Rare Diseases Research & Treatment
https://www.readbyqxmd.com/read/29138794/noninvasive-cardiac-testing-vs-clinical-evaluation-alone-in-acute-chest-pain-a-secondary-analysis-of-the-romicat-ii-randomized-clinical-trial
#4
Samuel W Reinhardt, Chien-Jung Lin, Eric Novak, David L Brown
Importance: The incremental benefit of noninvasive testing in addition to clinical evaluation (history, physical examination, an electrocardiogram [ECG], and biomarker assessment) vs clinical evaluation alone for patients who present to the emergency department (ED) with acute chest pain is unknown. Objective: To examine differences in outcomes with clinical evaluation and noninvasive testing (coronary computed tomographic angiography [CCTA] or stress testing) vs clinical evaluation alone...
November 14, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/29128364/one-versus-2-stent-strategy-for-the-treatment-of-bifurcation-lesions-in-the-context-of-a-coronary-chronic-total-occlusion-a-multicenter-registry
#5
Soledad Ojeda, Lorenzo Azzalini, Jorge Chavarría, Antonio Serra, Francisco Hidalgo, Susanna Benincasa, Livia L Gheorghe, Roberto Diletti, Miguel Romero, Barbara Bellini, Alejandro Gutiérrez, Javier Suárez de Lezo, Francisco Mazuelos, José Segura, Mauro Carlino, Antonio Colombo, Manuel Pan
INTRODUCTION AND OBJECTIVES: There is little evidence on the optimal strategy for bifurcation lesions in the context of a coronary chronic total occlusion (CTO). This study compared the procedural and mid-term outcomes of patients with bifurcation lesions in CTO treated with provisional stenting vs 2-stent techniques in a multicenter registry. METHODS: Between January 2012 and June 2016, 922 CTO were recanalized at the 4 participating centers. Of these, 238 (25...
November 8, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/29124057/radiation-induced-cardiovascular-disease-a-clinical-perspective
#6
REVIEW
Syed Wamique Yusuf, Bhanu Prasad Venkatesulu, Lakshmi Shree Mahadevan, Sunil Krishnan
Cancer survival has improved dramatically, and this has led to the manifestation of late side effects of multimodality therapy. Radiation (RT) to the thoracic malignancies results in unintentional irradiation of the cardiac chambers. RT-induced microvascular ischemia leads to disruption of capillary endothelial framework, and injury to differentiated myocytes results in deposition of collagen and fibrosis. Coexistence of risk factors of metabolic syndrome and preexisting atherosclerosis in addition to RT exposure results in accelerated occurrence of major coronary events...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29123858/development-of-new-equipment-for-intra-arrest-brain-cooling-that-uses-cooled-oxygen-in-the-lungs-volunteer-study
#7
Atsushi Sakurai, Rumi Tagami, Shingo Ihara, Junko Yamaguchi, Atsunori Sugita, Nami Sawada, Tomohide Komatsu, Satoshi Hori, Kosaku Kinoshita
Aims: Many experimental studies have reported that intra-arrest cooling during cardiac arrest is a promising treatment to mitigate brain injury. However, there is no clinically established method for cooling the brain during cardiac arrest. We hypothesized that, as blood flow in the lungs must be very slow during cardiopulmonary resuscitation, the blood could be cooled by ventilating the lungs with cooled oxygen like a radiator, and that this cooled blood would in turn cool the brain...
April 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29122140/cardiac-tissue-characterization-and-imaging-in-autoimmune-rheumatic-diseases
#8
REVIEW
Sophie I Mavrogeni, Petros P Sfikakis, Loukia Koutsogeorgopoulou, George Markousis-Mavrogenis, Theodoros Dimitroulas, Genovefa Kolovou, George D Kitas
Inflammation, microvascular and macrovascular ischemia, valvular disease, and fibrosis are the main causes of cardiovascular disease (CVD) in autoimmune rheumatic diseases (ARDs). The silent presentation and the high mortality and/or morbidity of CVD in ARDs necessitate a reliable tool for early diagnosis. Noninvasive cardiovascular imaging, including echocardiography, nuclear imaging, cardiovascular computed tomography (CT), cardiac magnetic resonance (CMR), and hybrid imaging modalities, constitutes the main tool for monitoring of CVD in ARDs...
November 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29110693/management-of-organ-motion-in-scanned-ion-beam-therapy
#9
REVIEW
Christoph Bert, Klaus Herfarth
Scanned ion beam therapy has special demands for treatment of intra-fractionally moving tumors such as lesions in lung or liver. Interplay effects between beam and organ motion can in those settings lead to under-dosage of the target volume. Dedicated treatment techniques such as gating or abdominal compression are required. In addition 4D treatment planning should be used to determine strategies for patient specific treatment planning such as an increased beam focus or the use of internal target volumes incorporating range changes...
November 6, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29102577/a-practical-approach-to-radiation-protection-for-cardiac-catheterization-laboratory-staff
#10
EDITORIAL
Kenneth A Fetterly, Malcom R Bell
No abstract text is available yet for this article.
October 26, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29102573/radiation-exposure-among-scrub-technologists-and-nurse-circulators-during-cardiac-catheterization-the-impact-of-accessory-lead-shields
#11
Ryan D Madder, Andrew LaCombe, Stacie VanOosterhout, Abbey Mulder, Matthew Elmore, Jessica L Parker, Mark E Jacoby, David Wohns
OBJECTIVES: This study was performed to determine if the use of an accessory lead shield is associated with a reduction in radiation exposure among staff members during cardiac catheterization. BACKGROUND: Accessory lead shields that protect physicians from scatter radiation are standard in many catheterization laboratories, yet similar shielding for staff members is not commonplace. METHODS: Real-time radiation exposure data were prospectively collected among nurses and technologists during 764 consecutive catheterizations...
October 25, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29101266/a-59-year-old-woman-with-visible-precordial-pulsations
#12
Alastair J Moss, Renzo Pessotto, Andrew D Flapan
CLINICAL INTRODUCTION: A retired 59-year-old woman presented to the cardiology clinic concerned with cardiac pulsations that were visible on her chest wall. These were not associated with dyspnoea, syncope or chest discomfort.Of note, 8 years previously, she complained of recurrent nocturnal diaphoresis and 5 kg weight loss. Blood sampling at that time revealed a microcytic anaemia, reactive thrombocytosis and raised inflammatory markers (erythrocyte sedimentation rate 99 mm/hour, C-reactive protein 161 mg/L)...
November 3, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29097345/tailoring-protocols-for-chest-ct-applications-when-and-how
#13
Roberto Iezzi, Anna Rita Larici, Paola Franchi, Riccardo Marano, Nicola Magarelli, Alessandro Posa, Biagio Merlino, Riccardo Manfredi, Cesare Colosimo
In the medical era of early detection of diseases and tailored therapies, an accurate characterization and staging of the disease is pivotal for treatment planning. The widespread use of computed tomography (CT)-often with the use of contrast material (CM)-probably represents the most important advance in diagnostic radiology. The result is a marked increase in radiation exposure of the population for medical purposes, with its intrinsic carcinogenic potential, and CM affecting kidney function. The radiologists should aim to minimize patient's risk by reducing radiation exposure and CM amount, while maintaining the highest image quality...
November 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/29097111/reduction-of-radiation-exposure-in-transcatheter-atrial-septal-defect-closure-how-low-must-we-go
#14
Fidelio Sitefane, Sophie Malekzadeh-Milani, Olivier Villemain, Magalie Ladouceur, Younes Boudjemline
BACKGROUND: Cardiac catheterization relies on X-ray imaging. Most procedures are now standardized. Interventionists must strive to minimize radiation exposure to reduce the risk of induced cancers. AIMS: To describe the radiation level in our institution, and evaluate the components contributing to radiation exposure, during transcatheter atrial septal defect (ASD) closure. METHODS: Radiation doses for ASD closure performed between January 2009 and November 2015 were reviewed retrospectively...
October 30, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/29097079/one-versus-2-stent-strategy-for-the-treatment-of-bifurcation-lesions-in-the-context-of-a-coronary-chronic-total-occlusion-a-multicenter-registry
#15
Soledad Ojeda, Lorenzo Azzalini, Jorge Chavarría, Antonio Serra, Francisco Hidalgo, Susanna Benincasa, Livia L Gheorghe, Roberto Diletti, Miguel Romero, Barbara Bellini, Alejandro Gutiérrez, Javier Suárez de Lezo, Francisco Mazuelos, José Segura, Mauro Carlino, Antonio Colombo, Manuel Pan
INTRODUCTION AND OBJECTIVES: There is little evidence on the optimal strategy for bifurcation lesions in the context of a coronary chronic total occlusion (CTO). This study compared the procedural and mid-term outcomes of patients with bifurcation lesions in CTO treated with provisional stenting vs 2-stent techniques in a multicenter registry. METHODS: Between January 2012 and June 2016, 922 CTO were recanalized at the 4 participating centers. Of these, 238 (25...
October 30, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/29096885/stress-induced-cardiomyopathy-in-cancer-patients
#16
Dana Elena Giza, Juan Lopez-Mattei, Pimprapa Vejpongsa, Ezequiel Munoz, Gloria Iliescu, Danai Kitkungvan, Saamir A Hassan, Peter Kim, Michael S Ewer, Cezar Iliescu
Takotsubo syndrome, also known as stress-induced cardiomyopathy (SC), is underrecognized in cancer patients. This study aims to investigate the incidence, natural history, and triggers of SC in cancer patients and its impact on cancer therapy and overall survival. A total of 30 subjects fulfilled the diagnostic criteria for SC at MD Anderson Cancer Center over a 6-year period. Clinical presentation, electrocardiogram, laboratory data, and transthoracic echocardiogram results registered during the acute phase and follow-up were collected...
September 19, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29091000/image-quality-of-prospectively-ecg-triggered-coronary-ct-angiography-in-heart-transplant-recipients
#17
Andrea Bartykowszki, Márton Kolossváry, Ádám Levente Jermendy, Júlia Karády, Bálint Szilveszter, Mihály Károlyi, Orsolya Balogh, Balázs Sax, Béla Merkely, Pál Maurovich-Horvat
OBJECTIVE: Cardiac allograft vasculopathy (CAV) is among the top causes of death 1 year after heart transplantation (HTx). Coronary CT angiography (CTA) is a potential alternative to invasive imaging in the diagnosis of CAV. However, the higher heart rate (HR) of HTx recipients prompts the use of retrospective ECG-gating, which is associated with higher radiation dose, a major concern in this patient population. Therefore, we sought to evaluate the feasibility and image quality of low-radiation-dose prospectively ECG-triggered coronary CTA in HTx recipients...
November 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29090490/the-effect-of-an-ultra-low-framerate-and-antiscatter-grid-less-radiation-protocol-for-cardiac-device-implantations
#18
Philipp Attanasio, Tobias Schreiber, Abdul Parwani, Philipp Lacour, Burkert Pieske, Wilhelm Haverkamp, Florian Blaschke, Martin Huemer
BACKGROUND AND AIMS: Antiscatter grids improve image contrast by absorbing scattered X-ray beams. By removing the antiscatter grid patient dose can be reduced as more X-ray beams reach the image receptor. Additionally there is a trend towards ultra low framerates for radiation dose reduction during various EP procedures. As for most cardiac device implantations (CIED) image quality demands are usually modest, the purpose of this study was to assess the safety and efficacy of an ultra-low frame rate and scatter grid-less radiation protocol...
November 1, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29082218/evaluation-of-radiation-exposure-pattern-and-radiation-absorbed-dose-resulting-from-occupational-exposure-of-anesthesiologists-to-ionizing-radiation
#19
B Maghsoudi, S M J Mortazavi, S Khademi, P Vatankhah
INTRODUCTION: Little information is available concerning the radiation exposure of anesthesiologists, and no such data have previously been collected in Iran. This prospective study was performed to determine the amount of radiation exposure of anesthesiologists for the purpose of assessing whether or not dangerous levels of radiation exposures were being reached, and to identify factors that correlate with excessive risk. PARTICIPANTS AND METHODS: The radiation exposure of all anesthesiology residents and the attending of Shiraz University of Medical Sciences during a 3-month period (from June to August 2016) was measured using a film badge with monthly readings...
September 2017: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/29081724/role-of-stress-cardiac-magnetic-resonance-imaging-in-women-with-suspected-ischemia-but-no-obstructive-coronary-artery-disease
#20
Sawan Jalnapurkar, Parham Zarrini, Puja K Mehta, Louise E J Thomson, Megha Agarwal, Bruce A Samuels, Chrisandra L Shufelt, Jo-Ann Eastwood, Daniel Berman, Noel Bairey Merz, Margo B Minissian
OBJECTIVE: Signs and symptoms of ischemia but no obstructive coronary artery disease (CAD) is often a diagnostic dilemma in women. The use of stress cardiac magnetic resonance imaging (CMRI) for advanced diagnostic assessment in these patients is a non-ionizing radiation option, but the diagnostic utility in this population is unknown. We examined the diagnostic role of stress CMRI in our patient population of these women. METHODS: We analyzed 113 consecutive female patients from 2/2006-11/2007 who had prior cardiac evaluations for signs and symptoms of ischemia but no obstructive CAD who underwent stress CMRI, which included anatomic, functional, adenosine stress perfusion and delayed enhancement imaging...
September 2017: Journal of Radiology Nursing
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