From the University of Texas Health Science Center at San Antonio. Dr
O'Leary is now at the University of Nebraska Medical Center.
Correspondence to Edward L. O'Leary, MD, Assistant Professor, Division of Cardiology, University of Nebraska Medical Center, 600 S 600th St, Omaha, NE 68198-2265.
A 63-year-old man
presented with a 2-week history of bilateral lower-extremity
edema, a 30-lb weight gain, increasing shortness of breath, and
paroxysmal nocturnal dyspnea. Past medical history was significant for
an initial episode of congestive heart failure in March 1995. A
subsequent cardiac catheterization at that time showed
a 90% occluded ostial left main coronary artery with
high-grade lesions involving the mid left anterior descending (LAD) and
circumflex arteries. Coronary artery bypass graft surgery was
performed with a left internal mammary artery (LIMA) graft to the LAD
and a saphenous vein graft to an obtuse marginal artery. The patient
was referred for cardiac catheterization on this
admission. An AL-1 catheter could not be successfully engaged into the
left main artery and was subsequently directed toward the right
coronary artery. There was no damping of the
arterial waveform upon engagement. Two sets of
biplane images in different projections showed this to be a 3.3-mm
(by quantitative angiography) conus branch off the right
coronary artery. It passed upward and over the right
ventricular outflow tract to provide collateral flow to the
LAD and subsequently the other vessels of the left coronary
artery system. This type of collateral system is known as Vieussens'
ring. Competitive flow was seen at the site of the LIMA-to-LAD
anastomosis.
Footnotes
The editor of Images in Cardiovascular Medicine is Hugh A. McAllister, Jr, MD, Chief, Department of Pathology, St Luke's Episcopal Hospital and Texas Heart Institute, and Clinical Professor of Pathology, University of Texas Medical School and Baylor College of Medicine.
Circulation encourages readers to submit cardiovascular images to Dr Hugh A. McAllister, Jr, St Luke's Episcopal Hospital and Texas Heart Institute, 6720 Bertner Ave, MC1267, Houston, TX 77030.
© 1998 American Heart Association, Inc.
Images in Cardiovascular Medicine
Vieussens' Ring

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Figure 1. Top, A 60° left anterior oblique view. LAD indicates left
anterior descending coronary artery; RI, ramus intermedius; Cx,
circumflex; LM, left main; RCA, right coronary artery; solid
arrow, conus-LAD bifurcation; and open arrow, conus-RCA bifurcation.
The left internal mammary artery can be faintly seen filling in
retrograde in the mid LAD. Bottom, A 30° right anterior oblique view.
Abbreviations as in top panel.
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