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ARTICLE |

Elevated Lipoprotein(a) and Premature Coronary Heart Disease

Vincent M. G. Maher, MD, MRCPI; B. Greg Brown, MD, PhD
JAMA. 1997;277(3):209. doi:10.1001/jama.1997.03540270035011.
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To the Editor.  —The article by Dr Bostom and colleagues1 reaffirms the importance of an elevated lipoprotein(a) [Lp(a)] level as a cardiac risk factor. We have postulated previously, based on our analysis of published works,2 that a pathological interaction exists between increased Lp(a) levels and elevated low-density lipoprotein (LDL) cholesterol levels, which is confirmed by our own experience.3 Furthermore, by lowering LDL cholesterol levels alone, the adverse effects of the interaction of these 2 particles is greatly diminished.3Bostom and colleagues did not observe such an interaction. The most likely explanation is that LDL cholesterol levels in their study were low (mean, 3.5 mmol/L [135 mg/dL]) relative to the mean LDL cholesterol levels in most studies previously published.2 We observed that, in the presence of such low LDL cholesterol levels, increased Lp(a) levels had only a small or negligible impact on disease outcome.2 In

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The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
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