Abstract
Breath-hold velocity-encoded cine MR (VENC-MR) imaging is a feasible method for measuring phasic blood flow velocity in small vessels that move during respiration. The purposes of the current study are to compare breathhold VENC-MR measurements of flow velocities in the internal mammary arteries (IMA) with nonbreath-hold measurements and to characterize the systolic and diastolic flow velocity curves in a cardiac cycle in native IMA and IMA grafts. Flow velocity in 30 native IMA and 8 IMA grafts were evaluated with a breath-hold VENC-MR sequence with K-space segmentation and view-sharing reconstruction(TR/TE = 16/9 msec, VENC = 100 cm/s). In 10 native IMA, nonbreath-hold VENC-MR images were acquired as well for comparison. Breath-hold VENC-MR imaging showed significantly higher systolic and diastolic peak velocities in native IMA (43.1 cm/second ± 15.0 and 10.0 cm/second ± 4.8), in comparison to those of nonbreath-hold VENC-MR imaging (27.6 cm/second ± 10.2 and 7.3 cm/ second ± 3.9, P <.05). The diastolic/systolic peak velocity ratio in the IMA grafts (.88 ± .41) was significantly higher than that in native IMA (.24 ± .08, P <.01). Interobserver variability in the flow velocity measurement was less than 4%. Breath-hold VENC-MR imaging demonstrated higher peak flow velocity in the IMA than nonbreath-hold VENC-MR imaging. This technique is a rapid and effective method for the noninvasive assessment of blood flow velocity in IMA grafts.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 219-222 |
| Number of pages | 4 |
| Journal | Journal of Magnetic Resonance Imaging |
| Volume | 6 |
| Issue number | 1 |
| State | Published - Jan 1996 |
| Externally published | Yes |
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Keywords
- Coronary artery bypass graft
- Coronary flow
- Internal mammary artery
- Magnetic resonance imaging
- Rapid MR imaging
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology
Cite this
Breath-hold MR measurements of blood flow velocity in internal mammary arteries and coronary artery bypass grafts. / Sakuma, Hajime; Globits, Sebastian; O'Sullivan, Margaret; Shimakawa, Ann; Bernstein, Matt A.; Foo, Thomas K F; Amidon, Thomas M.; Takeda, Kan; Nakagawa, Tsuyoshi; Higgins, Charles B.
In: Journal of Magnetic Resonance Imaging, Vol. 6, No. 1, 01.1996, p. 219-222.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Breath-hold MR measurements of blood flow velocity in internal mammary arteries and coronary artery bypass grafts
AU - Sakuma, Hajime
AU - Globits, Sebastian
AU - O'Sullivan, Margaret
AU - Shimakawa, Ann
AU - Bernstein, Matt A.
AU - Foo, Thomas K F
AU - Amidon, Thomas M.
AU - Takeda, Kan
AU - Nakagawa, Tsuyoshi
AU - Higgins, Charles B.
PY - 1996/1
Y1 - 1996/1
N2 - Breath-hold velocity-encoded cine MR (VENC-MR) imaging is a feasible method for measuring phasic blood flow velocity in small vessels that move during respiration. The purposes of the current study are to compare breathhold VENC-MR measurements of flow velocities in the internal mammary arteries (IMA) with nonbreath-hold measurements and to characterize the systolic and diastolic flow velocity curves in a cardiac cycle in native IMA and IMA grafts. Flow velocity in 30 native IMA and 8 IMA grafts were evaluated with a breath-hold VENC-MR sequence with K-space segmentation and view-sharing reconstruction(TR/TE = 16/9 msec, VENC = 100 cm/s). In 10 native IMA, nonbreath-hold VENC-MR images were acquired as well for comparison. Breath-hold VENC-MR imaging showed significantly higher systolic and diastolic peak velocities in native IMA (43.1 cm/second ± 15.0 and 10.0 cm/second ± 4.8), in comparison to those of nonbreath-hold VENC-MR imaging (27.6 cm/second ± 10.2 and 7.3 cm/ second ± 3.9, P <.05). The diastolic/systolic peak velocity ratio in the IMA grafts (.88 ± .41) was significantly higher than that in native IMA (.24 ± .08, P <.01). Interobserver variability in the flow velocity measurement was less than 4%. Breath-hold VENC-MR imaging demonstrated higher peak flow velocity in the IMA than nonbreath-hold VENC-MR imaging. This technique is a rapid and effective method for the noninvasive assessment of blood flow velocity in IMA grafts.
AB - Breath-hold velocity-encoded cine MR (VENC-MR) imaging is a feasible method for measuring phasic blood flow velocity in small vessels that move during respiration. The purposes of the current study are to compare breathhold VENC-MR measurements of flow velocities in the internal mammary arteries (IMA) with nonbreath-hold measurements and to characterize the systolic and diastolic flow velocity curves in a cardiac cycle in native IMA and IMA grafts. Flow velocity in 30 native IMA and 8 IMA grafts were evaluated with a breath-hold VENC-MR sequence with K-space segmentation and view-sharing reconstruction(TR/TE = 16/9 msec, VENC = 100 cm/s). In 10 native IMA, nonbreath-hold VENC-MR images were acquired as well for comparison. Breath-hold VENC-MR imaging showed significantly higher systolic and diastolic peak velocities in native IMA (43.1 cm/second ± 15.0 and 10.0 cm/second ± 4.8), in comparison to those of nonbreath-hold VENC-MR imaging (27.6 cm/second ± 10.2 and 7.3 cm/ second ± 3.9, P <.05). The diastolic/systolic peak velocity ratio in the IMA grafts (.88 ± .41) was significantly higher than that in native IMA (.24 ± .08, P <.01). Interobserver variability in the flow velocity measurement was less than 4%. Breath-hold VENC-MR imaging demonstrated higher peak flow velocity in the IMA than nonbreath-hold VENC-MR imaging. This technique is a rapid and effective method for the noninvasive assessment of blood flow velocity in IMA grafts.
KW - Coronary artery bypass graft
KW - Coronary flow
KW - Internal mammary artery
KW - Magnetic resonance imaging
KW - Rapid MR imaging
UR - http://www.scopus.com/inward/record.url?scp=0029680146&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029680146&partnerID=8YFLogxK
M3 - Article
C2 - 8851431
AN - SCOPUS:0029680146
VL - 6
SP - 219
EP - 222
JO - Journal of Magnetic Resonance Imaging
JF - Journal of Magnetic Resonance Imaging
SN - 1053-1807
IS - 1
ER -