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We have shown that basic fibroblast growth factor (bFGF/FGF-2) enhances myocardial collateral development in a canine model of progressive coronary occlusion when delivered via the left atrial or intracoronary routes; however, we have found intravenous bFGF ineffective in the same model. Data on the fate and efficacy of intravenous bFGF are limited. We hypothesized that first pass lung uptake might limit myocardial bFGF availability after intravenous injection. We postulated that delivery of bFGF through the distal port of a wedged Swan Ganz catheter might circumvent this problem by restricting exposure of bFGF to a limited number of pulmonary binding sites. This study evaluated differential regional uptake of 125I labeled bFGF following bolus intravenous, Swan Ganz, left atrial, intracoronary, and pericardial delivery.

Pharmacodynamics of basic fibroblast growth factor: route of administration determines myocardial and systemic distribution