Summary:We report two very unusual cases of agenesis of the right coronary ostium with continuation of the left circumflex artery as the right coronary artery. The recognition of the anomaly in the first case lead to a better understanding of this finding in the second case, which translated into shorter procedure time, less contrast volume, and fewer catheter manipulations.

We report 4 cases of deep venous thrombosis and/or pulmonary embolism after diagnostic cardiac catheterization. Two of these cases followed left heart catheterization alone.

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We report a case that showed reversibility of a generalized narrowing of the left internal mammary graft in response to interruption of collateral flow to the distal vessel supplied by the graft.

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