Association of lipoprotein(a) excess with early vein graft occlusions in middle-aged men undergoing coronary artery bypass surgery.
OBJECTIVE
To assess the relationship of lipoprotein(a) to early vein graft occlusions in patients after coronary artery bypass grafting.


METHODS
We studied 102 male patients (mean age 52.3 +/- 8.6 years) with chest pain occurrence during the first year (mean time 5.3 +/- 3.0 months) after surgical myocardial revascularization. Graft patency was examined by electron-beam computed tomography (n = 102) and quantitative coronary angiography (n = 31).


RESULTS
Patients were divided into 2 groups according to graft patency data: 66 (65%) with occlusions and 36 (35%) without occlusions at follow-up. No significant differences were found between the groups concerning age, smoking, family history of coronary heart disease, previous myocardial infarction, hypertension, serum lipids, and apolipoprotein B. Lipoprotein(a) level was significantly higher in patients with occluded grafts with a median (95% confidence intervals) of 24 mg/dL (17-42 mg/dL) versus 12 mg/dL (6-24 mg/dL) in patients with patent grafts, P <.01. More patients with nonoccluded grafts were taking statins postoperatively: 42% versus 18% of patients with occluded grafts, P <.05. The sensitivity and specificity of electron-beam computed tomography in revealing vein graft occlusion was close to 100%.


CONCLUSIONS
There is an association between high lipoprotein(a) level and vein graft occlusions in middle-aged men during the first year after coronary artery bypass grafting. Use of statins is associated with a lower rate of vein graft occlusion. Electron-beam tomography could be useful for assessing graft occlusions.
Pokrovsky
Sergei N
SN
Cardiology Research Center, 15a, 3rd Cherepkovskaya Street, Moscow 121552, Russia. dr.pokrovsky@cardio.ru
Ezhov
Marat V
MV
Il'ina
Larisa N
LN
Afanasieva
Olga I
OI
Sinitsyn
Valentin Y
VY
Shiriaev
Andrey A
AA
Akchurin
Renat S
RS
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001026:Coronary Artery Bypass; D005500:Follow-Up Studies; D006083:Graft Occlusion, Vascular / Q000097:blood*; D006801:Humans; D017270:Lipoprotein(a) / Q000097:blood*; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity
D017270:Lipoprotein(a)