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Association of vitamin d status with mental stress-induced myocardial ischemia in patients with coronary artery disease.
MedLine Citation:
PMID:  25222601     Owner:  NLM     Status:  In-Data-Review    
BACKGROUND: Mental stress-induced (MSIMI) or physical stress-induced (PSIMI) myocardial ischemia portends a worse prognosis in patients with coronary artery disease (CAD). Vitamin D insufficiency is associated with adverse cardiovascular outcomes, but its relationship to myocardial ischemia remains unclear. We hypothesized that vitamin D insufficiency will be associated with a higher prevalence of myocardial ischemia in patients with CAD.
METHODS: In 255 patients with stable CAD, myocardial perfusion imaging was performed to assess ischemia in response to mental and physical stress protocols. Vitamin D insufficiency was defined as serum 25-hydroxyvitamin D [25(OH)D] levels below 30 ng/ml, collected on the day of stress testing.
RESULTS: Mean (standard deviation) 25(OH)D level was 30.8 (12.8) ng/ml, and 139 (55%) patients had vitamin D insufficiency. MSIMI occurred in 30 (12%) patients and PSIMI in 67 (27%). Individuals with MSIMI had significantly lower levels of 25(OH)D as compared with those without MSIMI (24.0 [8.6] versus 31.7 [12.9], p = .002). The prevalence of MSIMI was higher in those with as compared with those without vitamin D insufficiency (17% versus 6%, p = .009). Moreover, low 25(OH)D levels remained independently associated with MSIMI after adjusting for potential confounders. Conversely, 25(OH)D levels were similar between those with or without PSIMI (29.8 [13.0] versus 31.4 [12.7], p = .37), as was the prevalence of PSIMI in those with or without vitamin D insufficiency (29% versus 24%, p = .42).
CONCLUSIONS: Vitamin D insufficiency is associated with a higher prevalence of MSIMI but not PSIMI among stable patients with CAD. Whether this association serves as a potential mechanism linking low vitamin D status to adverse cardiovascular outcomes warrants further investigation.
Ronnie Ramadan; Viola Vaccarino; Fabio Esteves; David S Sheps; James Douglas Bremner; Paolo Raggi; Arshed A Quyyumi
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Psychosomatic medicine     Volume:  76     ISSN:  1534-7796     ISO Abbreviation:  Psychosom Med     Publication Date:  2014 Sep 
Date Detail:
Created Date:  2014-09-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376505     Medline TA:  Psychosom Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  569-75     Citation Subset:  IM    
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