|
|
||||||||||
|
J Am Coll Cardiol, 2002; 40:546-554 © 2002 by the American College of Cardiology Foundation |

* Division of Cardiovascular DiseasesRochester, Minnesota, USA
Division of Hypertension, Department of Internal Medicine, Mayo Clinic and Foundation, Rochester, Minnesota, USA
Manuscript received February 27, 2002; revised manuscript received April 18, 2002, accepted May 7, 2002.
* Reprint requests and correspondence: Dr. Amir Lerman, Division of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA.
lerman.amir{at}mayo.edu
OBJECTIVES: This study was designed to assess the lipid-independent effects of simvastatin on myocardial perfusion (MP) and coronary microvascular permeability index (PI) at baseline and during episodes of increased cardiac demand in experimental hypercholesterolemia.
BACKGROUND: Simvastatin preserves coronary endothelial function in experimental hypercholesterolemia independent of its lipid-lowering effect. However, the functional significance of this observation is unknown.
METHODS: Pigs were randomized to three groups: normal diet (N), high-cholesterol diet (HC) and HC diet plus simvastatin (HC+S) for 12 weeks. Subsequently, cardiac electron beam computed tomography was performed before and during intravenous infusion of adenosine and dobutamine, and MP and PI were calculated.
RESULTS: Total and low density lipoprotein cholesterol levels were similarly and significantly increased in HC and HC+S animals compared with N. Basal MP was similar in all groups. Myocardial perfusion significantly increased in response to either adenosine or dobutamine in N and HC+S animals. Dobutamine also significantly increased MP in HC animals. However, the changes of MP in response to either drug were significantly lower in the HC group compared with the other two groups (p < 0.01 for adenosine and p < 0.05 for dobutamine vs. N and HC+S). Basal PI was similar in all groups and was not altered by either drug in N and HC+S animals. In contrast, PI significantly increased in HC pigs during infusion of either adenosine (p < 0.001) or dobutamine (p < 0.05).
CONCLUSIONS: These findings demonstrate that chronic administration of simvastatin preserves myocardial perfusion response and coronary microvascular integrity during cardiac stress in experimental hypercholesterolemia independent of lipid lowering.
| ||||||||||||||||||||||||||||
This article has been cited by other articles:
![]() |
G. J. Zoghbi, T. A. Dorfman, and A. E. Iskandrian The Effects of Medications on Myocardial Perfusion J. Am. Coll. Cardiol., August 5, 2008; 52(6): 401 - 416. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. Mannheim, D. Versari, E. Daghini, M. Gossl, O. Galili, A. Chade, V. S. Rajkumar, E. L. Ritman, L. O. Lerman, and A. Lerman Impaired myocardial perfusion reserve in experimental hypercholesterolemia is independent of myocardial neovascularization Am J Physiol Heart Circ Physiol, May 1, 2007; 292(5): H2449 - H2458. [Abstract] [Full Text] [PDF] |
||||
![]() |
A. Lerman, D. R. Holmes, J. Herrmann, and B. J. Gersh Microcirculatory dysfunction in ST-elevation myocardial infarction: cause, consequence, or both? Eur. Heart J., April 1, 2007; 28(7): 788 - 797. [Abstract] [Full Text] [PDF] |
||||
![]() |
X.-Y. Zhu, E. Daghini, A. R. Chade, C. Napoli, E. L. Ritman, A. Lerman, and L. O. Lerman Simvastatin Prevents Coronary Microvascular Remodeling in Renovascular Hypertensive Pigs J. Am. Soc. Nephrol., April 1, 2007; 18(4): 1209 - 1217. [Abstract] [Full Text] [PDF] |
||||
![]() |
E. P. van de Visse, M. van der Heijden, J. Verheij, G. P. van Nieuw Amerongen, V. W. M. van Hinsbergh, A. R. J. Girbes, and A. B. J. Groeneveld Effect of prior statin therapy on capillary permeability in the lungs after cardiac or vascular surgery. Eur. Respir. J., May 1, 2006; 27(5): 1026 - 1032. [Abstract] [Full Text] [PDF] |
||||
![]() |
K. Iwakura, H. Ito, S. Kawano, A. Okamura, T. Kurotobi, M. Date, K. Inoue, and K. Fujii Chronic pre-treatment of statins is associated with the reduction of the no-reflow phenomenon in the patients with reperfused acute myocardial infarction Eur. Heart J., March 1, 2006; 27(5): 534 - 539. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. Versari, E. Daghini, M. Rodriguez-Porcel, K. Sattler, O. Galili, K. Pilarczyk, C. Napoli, L. O. Lerman, and A. Lerman Chronic Antioxidant Supplementation Impairs Coronary Endothelial Function and Myocardial Perfusion in Normal Pigs Hypertension, March 1, 2006; 47(3): 475 - 481. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Rodriguez-Porcel, J. Herrman, A. R. Chade, J. D. Krier, J. F. Breen, A. Lerman, and L. O. Lerman Long-Term Antioxidant Intervention Improves Myocardial Microvascular Function in Experimental Hypertension Hypertension, February 1, 2004; 43(2): 493 - 498. [Abstract] [Full Text] [PDF] |
||||
![]() |
S. H. Wilson, A. R. Chade, A. Feldstein, T. Sawamura, C. Napoli, A. Lerman, and L. O. Lerman Lipid-lowering-independent effects of simvastatin on the kidney in experimental hypercholesterolaemia Nephrol. Dial. Transplant., April 1, 2003; 18(4): 703 - 709. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Rodriguez-Porcel, A. Lerman, J. Herrmann, R. S. Schwartz, T. Sawamura, M. Condorelli, C. Napoli, and L. O. Lerman Hypertension exacerbates the effect of hypercholesterolemia on the myocardial microvasculature Cardiovasc Res, April 1, 2003; 58(1): 213 - 221. [Abstract] [Full Text] [PDF] |
||||
![]() |
P.O Bonetti, L.O Lerman, C Napoli, and A Lerman Statin effects beyond lipid lowering--are they clinically relevant? Eur. Heart J., February 1, 2003; 24(3): 225 - 248. [Full Text] [PDF] |
||||
![]() |
W. Palinski and C. Napoli Unraveling Pleiotropic Effects of Statins on Plaque Rupture Arterioscler. Thromb. Vasc. Biol., November 1, 2002; 22(11): 1745 - 1750. [Full Text] [PDF] |
||||
| HOME | SUBSCRIPTIONS | CURRENT ISSUE | PAST ISSUES | CARDIOSOURCE | SEARCH | HELP | FEEDBACK |