title: Parathyroid hormone and vitamin D levels are independently associated with calcific aortic stenosis.
abstract: BACKGROUND
  In calcific aortic valve disease, the early lesion is similar to atherosclerotic plaque, but later calcification prevails. Parathyroid hormone (PTH) and vitamin D are the principal calcium pool regulators, so the present study was designed to assess their association with aortic stenosis (AS) in patients with significant coronary artery disease (CAD), and preserved renal function.
  
  
  RESULTS
  The 122 consecutive patients with AS (mean gradient > or =30 mmHg) plus CAD, and 101 patients with nonobstructive aortic sclerosis (mean gradient < or =10 mmHg) plus CAD, as controls, were prospectively enrolled. The AS patients were older (71+/-7 vs 66+/-7 years; p<0.001), had higher serum intact (i)PTH (51.4 [39-70] vs 37.4 [27-50] pg/ml; p<0.001), and lower plasma vitamin D (32.0 [25-40] vs 35.8 [27-55] nmol/L; p=0.003) levels than those with aortic sclerosis. The groups did not differ significantly in creatinine level (93 [82-105] vs 96 [85-107] micromol/L, p=0.19), calcium - phosphate product, occurrence of hypertension, smoking, diabetes, dyslipidemia, or body mass index. The iPTH (odds ratio (OR) 1.04, 95% confidence interval (CI) 1.02-1.05; p<0.001) and vitamin D levels (OR 0.97, 95% CI 0.95-0.99; p=0.003) were independently associated with AS.
  
  
  CONCLUSIONS
  Higher serum iPTH with lower vitamin D levels were independently associated with calcific AS in CAD patients.
authors.affiliation: Department of Cardiology, Cardiovascular Center, University Hospital Motol, V Ualu 84,150 06 Prague, Czech Republic. linhartkaterina@atlas.cz
authors.forename: Katerina
authors.initials: K
authors.lastname: Linhartová
authors.forename: Josef
authors.initials: J
authors.lastname: Veselka
authors.forename: Gabriela
authors.initials: G
authors.lastname: Sterbáková
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Racek
authors.forename: Ondrej
authors.initials: O
authors.lastname: Topolcan
authors.forename: Roman
authors.initials: R
authors.lastname: Cerbák
mesh_terms: D000368:Aged; D001024:Aortic Valve Stenosis / Q000097:blood* / Q000150:complications / Q000503:physiopathology; D002114:Calcinosis / Q000097:blood* / Q000150:complications / Q000503:physiopathology; D003324:Coronary Artery Disease / Q000097:blood* / Q000150:complications / Q000503:physiopathology; D005260:Female; D006801:Humans; D007668:Kidney / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000097:blood*; D011446:Prospective Studies; D014807:Vitamin D / Q000097:blood*
chemical_list: D010281:Parathyroid Hormone; D014807:Vitamin D