PMID- 8324302
OWN - NLM
STAT- MEDLINE
DCOM- 19930812
LR  - 20190914
IS  - 1053-1807 (Print)
IS  - 1053-1807 (Linking)
VI  - 3
IP  - 3
DP  - 1993 May-Jun
TI  - MR characterization of blood flow in native and grafted internal mammary 
      arteries.
PG  - 443-50
AB  - In the postoperative patient with anginal symptoms, differentiation between 
      bypass graft compromise and nonischemic causes has until now been accomplished 
      only by means of x-ray angiography. A non-invasive test is clearly desirable. The 
      authors used a cine phase-contrast (PC) magnetic resonance (MR) imaging technique 
      to characterize blood flow in native and grafted internal mammary arteries 
      (IMAs). Ten volunteers and 15 patients who had recently undergone IMA coronary 
      artery bypass grafting were imaged. Cine PC MR imaging was performed in the 
      transaxial plane at the level of the pulmonary artery bifurcation. Flow in both 
      IMAs was quantified and expressed as a percentage of cardiac output measured in 
      the ascending aorta. In the 15 patients, flow analysis was performed in both the 
      native and grafted IMAs. In the volunteers, IMA blood flow ranged from 2.1% to 
      4.3% of cardiac output on the left (mean, 3.5%) and 2.1% to 5.1% (mean, 3.5%) on 
      the right. There was considerable intersubject variability, with coefficients of 
      variation of 10.7% for the left and 12.3% for the right IMA. Intrasubject 
      variability was limited, with estimated common standard deviations of 0.45% of 
      cardiac output (range, 0.2%-1.1%) for the left and 0.39% (range, 0.1%-0.6%) for 
      the right IMA. Flow in grafted IMAs was identified in 13 of 15 patients. In one 
      of two patients without demonstrable IMA graft flow, cardiac catheterization 
      confirmed lack of flow. IMA graft flow varied from 28 to 164 mL/min (mean, 80.3 
      mL/min). This study shows the feasibility of using cine PC MR imaging as a 
      quantitative method of evaluating blood flow in IMA coronary artery bypass 
      grafts.
FAU - Debatin, J F
AU  - Debatin JF
AD  - Department of Radiology, Stanford University Medical Center, CA 94305.
FAU - Strong, J A
AU  - Strong JA
FAU - Sostman, H D
AU  - Sostman HD
FAU - Negro-Vilar, R
AU  - Negro-Vilar R
FAU - Paine, S S
AU  - Paine SS
FAU - Douglas, J M Jr
AU  - Douglas JM Jr
FAU - Pelc, N J
AU  - Pelc NJ
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Magn Reson Imaging
JT  - Journal of magnetic resonance imaging : JMRI
JID - 9105850
SB  - IM
MH  - Adult
MH  - Aged
MH  - *Blood Flow Velocity
MH  - *Coronary Artery Bypass
MH  - Female
MH  - Humans
MH  - *Magnetic Resonance Imaging
MH  - Male
MH  - Mammary Arteries/*physiopathology/transplantation
MH  - Middle Aged
EDAT- 1993/05/01 00:00
MHDA- 2001/03/28 10:01
CRDT- 1993/05/01 00:00
PHST- 1993/05/01 00:00 [pubmed]
PHST- 2001/03/28 10:01 [medline]
PHST- 1993/05/01 00:00 [entrez]
AID - 10.1002/jmri.1880030303 [doi]
PST - ppublish
SO  - J Magn Reson Imaging. 1993 May-Jun;3(3):443-50. doi: 10.1002/jmri.1880030303.