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(Circulation. 2000;101:118.)
© 2000 American Heart Association, Inc.

Brief Rapid Communications

Effect of Intracoronary Recombinant Human Vascular Endothelial Growth Factor on Myocardial Perfusion

Evidence for a Dose-Dependent Effect

Robert C. Hendel, MD; Timothy D. Henry, MD; Krishna Rocha-Singh, MD; Jeffrey M. Isner, MD; Dean J. Kereiakes, MD; Frank J. Giordano, MD; Michael Simons, MD; Robert O. Bonow, MD

From Northwestern University Medical School, Chicago, Ill (R.C.H., R.O.B.); Hennepin County Medical Center, Minneapolis, Minn (T.D.H.); Prairie Cardiovascular Consultants, Springfield, Ill (K.R.-S.); St Elizabeth’s Medical Center, Boston, Mass (J.M.I.); Lindner Center for Clinical Cardiovascular Research, Cincinnati, Ohio (D.J.K.); Yale University School of Medicine, New Haven, Conn (F.J.G.); and Beth Israel Deaconess Medical Center, Boston, Mass (M.S.).

Correspondence to Robert C. Hendel, MD, 1725 W Harrison St, Chicago, IL 60612-3864. E-mail rhendel{at}rush.edu

Background—Animal models of therapeutic angiogenesis have stimulated development of clinical application in patients with limited options for coronary revascularization. The impact of recombinant human vascular endothelial growth factor (rhVEGF) on myocardial perfusion in humans has not been reported.

Methods and Results—Fourteen patients underwent exercise (n=11), dobutamine (n=2), or dipyridamole (n=1) myocardial perfusion single photon emission CT (SPECT) before as well as 30 and 60 days after rhVEGF administration. After uniform processing and display, 2 observers blinded to the timing of the study and dose of rhVEGF reviewed the SPECT images. By a visual, semiquantitative 20-segment scoring method, summed stress scores (SSS) and summed rest scores (SRS) were generated. Although the SSS did not change from baseline to 30 days (21.6 versus 21.5; P=NS), the SRS improved after rhVEGF (13.2 versus 10.4; P<0.05). Stress and rest perfusion improved in >2 segments infrequently in patients treated with low-dose rhVEGF. However, 5 of 6 patients had improvement in >2 segments at rest and stress with the higher rhVEGF doses. Furthermore, although neither the SSS nor the SRS changed in patients treated with the low doses, the SRS decreased in the high-dose rhVEGF patients at 60 days (14.7 versus 10.7; P<0.05). Quantitative analysis was consistent with the visual findings but failed to demonstrate statistical significance.

Conclusions—Although not designed to demonstrate rhVEGF efficacy, these phase 1 data support the concept that rhVEGF improves myocardial perfusion at rest and provide evidence of a dose-dependent effect.

Key Words: growth substances • tomography • angiogenesis

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