Morphologic features of culprit lesions in sudden coronary death with family history of premature coronary artery disease.

The morphologic features of familial coronary artery disease (CAD) resulting in sudden coronary death (SCD) are poorly studied. The presence and type of culprit lesions may have important implications in the genetic basis for familial heart disease. Autopsies of SCD victims over a 5-year period from a statewide medical examiner's office were studied. Premature familial disease was defined as sudden death at ≤50 years in women and ≤45 years in men, with premature SCD or acute coronary syndrome in a first-degree relative. Culprit lesion was defined as acute plaque rupture, plaque erosion, and severe narrowing without thrombus (stable plaque). There were 174 acute plaque ruptures (age 49±10 years, 9% women), 49 plaque erosions (age 45±8 years, 37% women), and 213 stable plaques (age 53±11 years, 22% women). There were 8 plaque rupture with family history. There were 9 plaque erosions with family history. There were 7 stable plaques with family history. The rate of familial history in premature coronary disease was 18.4% in erosions, 4.6% in ruptures (p=.02 vs. erosion), and 3.3% in stable plaque (p=.002 vs. erosion). We concluded that the frequency of family history of premature sudden death due to CAD may be higher in plaque erosion as compared to patients dying with acute plaque rupture or stable plaque.