Effects of Heart Imaging Radiation on DNA Double-Stranded Breaks in Blood Lymphocytes and Hair Follicle Cells
The HEART BREAK Study: Effects of Heart Imaging Radiation on DNA Double-Stranded Breaks in Blood Lymphocytes and Hair Follicle Cells
Purpose
- To investigate the effects of cardiac imaging radiation on the induction of DNA double-strand breaks by enumerating gamma-H2AX foci in blood lymphocytes and plucked hair follicle cells.
- To estimate whether the use of breast shields in cardiac computed tomographic angiography (CCTA) limits the effective radiation exposure of breast tissue.
調査の概要
詳細な説明
The primary objective of the study is to analyze blood and hair samples from patients undergoing cardiac imaging to estimate radiation exposure levels as well as their biological effects (i.e. to determine the degree of genotoxicity by measuring the amounts of DNA double-strand breaks).
The secondary objective is to investigate whether the use of in-plane breast shielding in female patients undergoing CT angiography (CCTA) limits the radiation exposure of breast tissue and subsequent DNA damage in blood lymphocytes and hair follicle cells.
研究の種類
入学 (実際)
段階
- 適用できない
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- Adult male and female adult subjects (age greater than 18 years)
- Referred for cardiac computed tomography angiography (CCTA), myocardial perfusion scintigraphy (MPS), or diagnostic invasive coronary angiography (ICA).
Exclusion Criteria:
- Female patients that identify themselves as pregnant or have a positive pregnancy test prior to cardiac imaging.
- History (present or past) of leukemia or lymphoma.
- History of radiation therapy
- X-ray examination or scintigraphy within the last 72 hours.
- History of coronary revascularization (coronary artery bypass grafting or percutaneous coronary intervention)
- Patients undergoing percutaneous coronary intervention at completion of diagnostic left heart catheterization
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:診断
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:なし(オープンラベル)
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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アクティブコンパレータ:CCTA Breast Shields
Within female subset, randomization to wearing bismuth breast shield.
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Breast shield placement (randomized) among women.
他の名前:
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介入なし:CCTA No Breast Shields
Within female subset, randomization to wearing no bismuth breast shield (standard of care).
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介入なし:Observational Arm
Non-females undergoing CTA and subjects undergoing cardiac catheterization and nuclear medicine testing.
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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Number of Excess Double-strand DNA Break Foci Per Cell in Peripheral Blood Samples Post-imaging
時間枠:Change from baseline double strand DNA breaks at 30 minutes post-imaging
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The amount of excess DNA double-strand break foci per cell after cardiac computed tomographic angiography (CCTA) in female patients with and without breast shields, minus the amount of foci prior to CCTA.
In addition, changes in DNA double-strand breaks from baseline following cardiac testing in the observational arm is being assessed in an observational manner.
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Change from baseline double strand DNA breaks at 30 minutes post-imaging
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協力者と研究者
研究記録日
主要日程の研究
研究開始
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。