|
Intera CV Post-CABG Follow-up: CE-MRA & Q-Flow
Courtesy of: Nova Scans MRI Center, Bangalore, India
March 02, 2004
Patient History
- Male patient 45 yrs of age
- History of myocardial infarction
- Underwent CABG: LIMA graft to LAD, saphenous vein graft to RCA
- CE-MRA and Q-flow imaging done to assess graft patency (only LIMA imaging results shown here)
System info:
- Intera CV, SENSE Cardiac Coil, VCG
CE-MRA:
- 20 ml Gadolinium + 20 ml Saline; BolusTrak; CENTRA
- SENSE factor 2.0
- Oblique Coronal 3D T1-TFE /512 matrix; 66 slices, each 2.0mm
- 13 second breath-hold
- Full-volume & targeted MIP post-processing
Q-Flow Of Proximal LIMA Graft:
- Rest Flow studied
- T1-TFE, 16 cardiac phases, Respiratory triggered
- Velocity encoding 100cm/sec, Scan-time 40 seconds
- Post-processing on Intera console & Easy-Vision
Contrast-Enhanced MRA of LIMA Graft
Full-Volume MIP Views
| |
 |  | Red arrow indicates LIMA graft
Click to enlarge | Red arrow indicates LIMA graft
Click to enlarge |
|
| |
|
Contrast-Enhanced MRA of LIMA Graft
| |
 | | Coronal MIP Of Targeted Volume |
|
| |
|
|
Q-flow at Rest: Flux (ml/s) Profile In Proximal LIMA Graft
- Heart Rate: 95 bpm
- RR interval: 632 ms
- Stroke Vol: 2.1 ml
- Mean Flux: 3.4 ml/s
- Mean Velocity: 10.5cm/s
|
Biphasic flow profile & greater diastolic flow consistent with patency of coronary graft
|
| |
 |  | | Mean Velocity Results | Peak Velocity Results |
|
| |
|
Normal Results: Peak diastolic velocity at rest in LIMA graft is 2.5 times the peak systolic velocity.
|
