Dual-Source CT for Visualization of the Coronary Arteries in Heart Transplant Patients with High Heart Rates
Gorka Bastarrika1,
Carlo Nicola De Cecco2,
Maria Arraiza1,
Stefano Mastrobuoni3,
Jesús C. Pueyo1,
Matias Ubilla3 and
Gregorio Rábago3
1 Department of Radiology, Clínica Universitaria, Universidad de Navarra,
Ave. Pío XII, 36, 31008 Pamplona, Spain.
2 Department of Radiology, Universitá di Roma Sapienza–Ospedale
Sant'Andrea, Rome, Italy.
3 Department of Cardiovascular Surgery, Clínica Universitaria,
Universidad de Navarra, Pamplona, Spain.
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Fig. 1A —69-year-old heart transplant recipient with heart rate of 90
beats/min who underwent dual-source CT coronary angiography. Reconstructions
of segment 2 of right coronary artery in different phases of cardiac cycle
show examples of 5-point grading scale. Quality scores of 2 or greater were
considered acceptable for routine clinical diagnosis. Score 4 image is of
excellent quality for accurate evaluation of coronary artery disease.
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Fig. 1B —69-year-old heart transplant recipient with heart rate of 90
beats/min who underwent dual-source CT coronary angiography. Reconstructions
of segment 2 of right coronary artery in different phases of cardiac cycle
show examples of 5-point grading scale. Quality scores of 2 or greater were
considered acceptable for routine clinical diagnosis. Score 3 image has minor
artifacts and is of good quality for ruling out coronary artery disease.
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Fig. 1C —69-year-old heart transplant recipient with heart rate of 90
beats/min who underwent dual-source CT coronary angiography. Reconstructions
of segment 2 of right coronary artery in different phases of cardiac cycle
show examples of 5-point grading scale. Quality scores of 2 or greater were
considered acceptable for routine clinical diagnosis. Score 2 image is of
sufficient diagnostic quality for ruling out significant coronary artery
disease.
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Fig. 1D —69-year-old heart transplant recipient with heart rate of 90
beats/min who underwent dual-source CT coronary angiography. Reconstructions
of segment 2 of right coronary artery in different phases of cardiac cycle
show examples of 5-point grading scale. Quality scores of 2 or greater were
considered acceptable for routine clinical diagnosis. Score 1 image is not
assessable owing to blurring and motion artifact impeding arterial
evaluation.
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Fig. 1E —69-year-old heart transplant recipient with heart rate of 90
beats/min who underwent dual-source CT coronary angiography. Reconstructions
of segment 2 of right coronary artery in different phases of cardiac cycle
show examples of 5-point grading scale. Quality scores of 2 or greater were
considered acceptable for routine clinical diagnosis. Score 0 image is not
evaluative. Vessels are not differentiable.
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Fig. 1F —69-year-old heart transplant recipient with heart rate of 90
beats/min who underwent dual-source CT coronary angiography. Reconstructions
of segment 2 of right coronary artery in different phases of cardiac cycle
show examples of 5-point grading scale. Quality scores of 2 or greater were
considered acceptable for routine clinical diagnosis. Volume-rendered
reconstruction shows best reconstruction interval for this coronary
segment.
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Fig. 2A —68-year-old man with mean heart rate of 87 beats/min and
heart rate variability of 2.26 beats/min. Despite high heart rate during
scanning, dual-source CT coronary angiograms of all coronary arteries are of
diagnostic quality. Curved multiplanar reconstructions of left anterior
descending artery (A), right coronary artery (B), and circumflex
artery (C).
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Fig. 2B —68-year-old man with mean heart rate of 87 beats/min and
heart rate variability of 2.26 beats/min. Despite high heart rate during
scanning, dual-source CT coronary angiograms of all coronary arteries are of
diagnostic quality. Curved multiplanar reconstructions of left anterior
descending artery (A), right coronary artery (B), and circumflex
artery (C).
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Fig. 2C —68-year-old man with mean heart rate of 87 beats/min and
heart rate variability of 2.26 beats/min. Despite high heart rate during
scanning, dual-source CT coronary angiograms of all coronary arteries are of
diagnostic quality. Curved multiplanar reconstructions of left anterior
descending artery (A), right coronary artery (B), and circumflex
artery (C).
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Fig. 2D —68-year-old man with mean heart rate of 87 beats/min and
heart rate variability of 2.26 beats/min. Despite high heart rate during
scanning, dual-source CT coronary angiograms of all coronary arteries are of
diagnostic quality. Volume-rendered image of whole coronary tree
(D).
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Fig. 3A —Dispersion plots of mean image quality scores in relation to
mean heart rate for all coronary segments in each patient. Dispersion plot
shows results for left coronary artery image quality.
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Fig. 3B —Dispersion plots of mean image quality scores in relation to
mean heart rate for all coronary segments in each patient. Dispersion plot
shows results for right coronary artery image quality.
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Fig. 3C —Dispersion plots of mean image quality scores in relation to
mean heart rate for all coronary segments in each patient. Dispersion plot
shows results for circumflex artery image quality.
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Copyright © 2008 by the American Roentgen Ray Society.
