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Tamirisa KP, Alasnag M, Calvert P, Islam S, Bhardwaj A, Pakanati K, Zieroth S, Razminia M, Dalal AS, Mamas M, Russo AM, Kort S. Radiation Exposure, Training, and Safety in Cardiology. JACC. ADVANCES 2024; 3:100863. [PMID: 38939686 PMCID: PMC11198606 DOI: 10.1016/j.jacadv.2024.100863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/19/2023] [Accepted: 01/04/2024] [Indexed: 06/29/2024]
Abstract
Exposure to ionizing radiation is an inherent occupational health hazard in clinical cardiology. Health risks have been reported previously, including predilection to cancer. In addition, orthopedic injury due to prolonged wearing of heavy protective lead aprons, which are mandatory to reduce radiation risk, have been extensively documented. Cardiology as a specialty has grown with rising volumes of increasingly complex procedures. This includes electrophysiological, coronary, and structural intervention, advanced heart failure/transplant management, and diagnostic imaging. Both the operator as well imaging specialists are exposed to radiation, particularly in structural interventions where interventional cardiologists and structural imagers work closely. Increasingly, women interested in cardiology may deselect the field due to radiation concerns. This expert document highlights the risks of radiation exposure in cardiology, including practical tips within various subspecialty fields such as interventional/structural cardiology, electrophysiology, imaging, advanced heart failure, and pediatric cardiology.
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Affiliation(s)
| | - Mirvat Alasnag
- Cardiac Center, King Fahd Armed Forces Hospital, Jeddah, Saudi Arabia
| | - Peter Calvert
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, UK
| | - Sabrina Islam
- Section of Cardiology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, USA
| | - Anju Bhardwaj
- Advanced Cardiopulmonary Therapies and Transplantation, University of Texas/McGovern Medical School, Texas Medical Center, Houston, Texas, USA
| | - Keerthana Pakanati
- Center for Cardiovascular Health, Virginia Mason Franciscan Health, Seattle, Washington, USA
| | - Shelley Zieroth
- Department of Cardiology, St. Boniface Hospital, Winnipeg, Manitoba, Canada
| | | | - Aarti S. Dalal
- Division of Cardiology, Department of Pediatrics, Vanderbilt Medical Center, Nashville, Tennessee, USA
| | - Mamas Mamas
- Keele Cardiovascular Research Group, Keele University, Stoke on Trent, UK
| | - Andrea M. Russo
- Division of Cardiology, Cooper University Hospital, Camden, New Jersey, USA
| | - Smadar Kort
- Department of Cardiology, Stony Brook Heart Institute, Stony Brook, New York, USA
| | - ACC Women in Cardiology Advocacy Work Group
- Texas Cardiac Arrhythmia Institute, Austin, Texas, USA
- Cardiac Center, King Fahd Armed Forces Hospital, Jeddah, Saudi Arabia
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, UK
- Section of Cardiology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, USA
- Advanced Cardiopulmonary Therapies and Transplantation, University of Texas/McGovern Medical School, Texas Medical Center, Houston, Texas, USA
- Center for Cardiovascular Health, Virginia Mason Franciscan Health, Seattle, Washington, USA
- Department of Cardiology, St. Boniface Hospital, Winnipeg, Manitoba, Canada
- Amita St. Joseph Hospital, Elgin, Illinois, USA
- Division of Cardiology, Department of Pediatrics, Vanderbilt Medical Center, Nashville, Tennessee, USA
- Keele Cardiovascular Research Group, Keele University, Stoke on Trent, UK
- Division of Cardiology, Cooper University Hospital, Camden, New Jersey, USA
- Department of Cardiology, Stony Brook Heart Institute, Stony Brook, New York, USA
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Dalvi S, Roberts HM, Bellamy C, Rees M. The use of digital magnification to reduce radiation dose in the cardiac catheter laboratory. Br J Radiol 2022; 95:20210269. [PMID: 34889648 PMCID: PMC8722255 DOI: 10.1259/bjr.20210269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVES To audit whether using magnification of images by use of a large viewing screen using digital matrix magnification which enlarges the image by 33% without using the X-ray machine zoom magnification protocols on a Siemens Artis Zee X-ray machine in a cardiac catheter laboratory results in a reduction of kerma-area product (KAP) for both diagnostic and interventional procedures. This reduction was predicted in an in vitro study in our laboratory, which has previously shown a 20.4% reduction in KAP. METHODS A retrospective analysis was conducted of the radiation exposure to compare the measured KAP recorded during the period when conventional magnification with automatic brightness and dose control was used on a Siemens Artis Zee X-ray machine with a flat panel detector and when magnification settings were avoided by using a large screen to enlarge and project a non-magnified image by digital magnification. The analysis was carried out for patients having a diagnostic coronary angiogram and those having an interventional coronary procedure. RESULTS For diagnostic coronary angiograms the median KAP per procedure in the period using conventional magnification was 2124.5 µGy.m2 compared to 1401 µGy.m2 when image matrix magnification was used, a 34% reduction (p < 0.0001). For interventional coronary procedures, the median KAP per procedure in the period using conventional magnification was 3791 µGy.m2 compared to 2568.5 µGy.m2 when image matrix magnification was used, a 32% reduction (p < 0.0001). CONCLUSION Avoiding using conventional magnification in the cardiac catheter laboratory and using a large screen to magnify images was associated with a statistically significant greater than 30% reduction in KAP. ADVANCES IN KNOWLEDGE This paper is the proof in clinical practice of a theoretical conclusion that radiation dose (KAP) is reduced by use of Image matrix magnification using a large viewing screen without the need to use X-ray tube magnification without significant loss of image resolution in interventional cardiology. The same approach will be useful in interventional radiology.
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Zhuang L, Xia W, Hou M. Co‑culturing with hypoxia pre‑conditioned mesenchymal stem cells as a new strategy for the prevention of irradiation‑induced fibroblast‑to‑myofibroblast transition. Oncol Rep 2019; 42:1781-1792. [PMID: 31485596 PMCID: PMC6775806 DOI: 10.3892/or.2019.7293] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 07/26/2019] [Indexed: 02/06/2023] Open
Abstract
Cardiac fibrosis is a pathological consequence of radiation-induced fibroblast proliferation and fibroblast-to-myofibroblast transition (FMT). Mesenchymal stem cell (MSC) transplantation has been revealed to be an effective treatment strategy to inhibit cardiac fibrosis. We identified a novel MSC-driven mechanism that inhibited cardiac fibrosis, via the regulation of multiple fibrogenic pathways. Hypoxia pre-conditioned MSCs (MSCsHypoxia) were co-cultured with fibroblasts using a Transwell system. Radiation-induced fibroblast proliferation was assessed using an MTT assay, and FMT was confirmed by assessing the mRNA levels of various markers of fibrosis, including type I collagen (Col1) and alpha smooth muscle actin (α-SMA). α-SMA expression was also confirmed via immunocytochemistry. The expression levels of Smad7 and Smad3 were detected by western blotting, and Smad7 was silenced using small interfering RNAs. The levels of oxidative stress following radiation were assessed by the detection of reactive oxygen species (ROS) and the activity of superoxide dismutase (SOD), malondialdehyde (MDA), and 4-hydroxynonenal (HNE). It was revealed that co-culturing with MSCsHypoxia could inhibit fibroblast proliferation and FMT. In addition, the present results indicated that MSCs are necessary and sufficient for the inhibition of fibroblast proliferation and FMT by functionally targeting TGF-β1/Smad7/Smad3 signaling via the release of hepatocyte growth factor (HGF). Furthermore, it was observed that MSCs inhibited fibrosis by modulating oxidative stress. Co-culturing with MSCsHypoxia alleviated fibroblast proliferation and FMT via the TGF-β1/Smad7/Smad3 pathway. MSCs may represent a novel therapeutic approach for the treatment of radiation-related cardiac fibrosis.
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Affiliation(s)
- Lei Zhuang
- Department of Hepatobiliary Surgery, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Wenzheng Xia
- Department of Neurosurgery, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Meng Hou
- Department of Radiation Oncology, First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
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