Cholesterol Guidelines May Underestimate Cardiovascular Risk in HIV-Infected Patients – See more at: http://www.jwatch.org/na35651/2014/09/09/cholesterol-guidelines-may-underestimate-cardiovascular#sthash.fanWUptz.dpuf


Although new guidelines recommend statin use in more HIV-infected patients, most of those with evidence of coronary plaque are still not flagged as needing therapy.

 Cholesterol guidelines released in 2013 recommend statin therapy for, among others, patients aged 40 to 75 with a 10-year atherosclerotic cardiovascular disease (CVD) risk ≥7.5%, as estimated by a new calculator. Whether this recent guideline, which was designed for the general population, is better than the 2004 Adult Treatment Panel III guidelines at predicting CVD — or at appropriately recommending statin use — in HIV-infected patients is not known. Now, investigators have examined the performance of the new and old guidelines in a cohort of HIV-infected patients.

A total of 108 patients without known CVD underwent coronary computed-tomography angiography (CCTA). The median age was 46 years, 50% were current smokers, and 20% were receiving antihypertensive medications. Despite the relatively low overall 10-year atherosclerotic CVD risk score (3.3%), 36% of participants had high-risk–morphology plaque detected on angiography. When the new and old guidelines were applied, several striking findings emerged:

  • In the overall study population, statins would be recommended for 21% by the 2013 guidelines versus 8% by the 2004 guidelines.

  • Among patients with high-risk–morphology coronary plaque, statins would be recommended for 26% by the 2013 guidelines and 10% by the 2004 guidelines.

  • Among patients without coronary plaque, statins would be recommended for 15% by the 2013 guidelines versus 5% by the 2004 guidelines.

COMMENT

The main limitation of this study is that detection of high-risk–morphology plaque on CCTA is not yet known to be predictive of CVD risk — or statin benefit — in HIV-infected patients. Nevertheless, the finding that 74% of HIV-infected patients with high-risk–morphology plaque would not qualify for statins even by the more-encompassing 2013 guidelines is alarming. Would HIV-infected patients who do not meet current guidelines benefit from statin use? A randomized clinical trial to address this question is in the offing.

– See more at: http://www.jwatch.org/na35651/2014/09/09/cholesterol-guidelines-may-underestimate-cardiovascular#sthash.fanWUptz.dpuf