Title: Effect of heart rate and heart rate variability on image quality of coronary angiography with 64-slice CT
Abstract: Objective To evaluate retrospectively the effect of average heart rate and heart rate variability on image quality of 64-slice computed tomographic(CT)coronary angiography.Methods 129 patients were studied with 64-slice CT coronary angiography.Data sets were reconstructed from 40% to 80% of R-R interval.Image quality of each coronary segment at least 1.5 mm in diameter was rated.Pearson correlation analysis was performed to observe the effect of average heart rate and heart rate variability on image quality of each patient.Results Diagnostic image quality(score≤3)was attained in 93.9% segments at the best reconstruction interval.Image quality was correlated with heart rate and heart rate variability.Good to excellent image quality could be achieved at heart rates of 69.7 or fewer beats per minute and heart rate variability of 15.7 or fewer beats per minute.Best image quality was obtained at diastole with heart rate lower than 63 beats per minute and at systole with heart rate higher than 67 beats per minute.Conclusion Image quality of 64-slice CT coronary angiography is highly dependent on average heart rate and heart rate variability.Reducing average heart rate and heart rate variability is beneficial to reducing artifacts.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot