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Risk of cardiovascular events in patients having had acute calcium pyrophosphate crystal arthritis
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  • Published on:
    Correspondence on “Risk of cardiovascular events in patients having had acute calcium pyrophosphate crystal arthritis” by Tedeschi et al.
    • Tsung-Kun Lin, Professor School of Pharmacy, National Defense Medical Center, Taipei, Taiwan
    • Other Contributors:
      • Gwo-Ping Jong, Professor

    We read with interest the study by Dr. Tedeschi and colleagues [1] which reported that patients with at least one episode of acute Calcium pyrophosphate (CPP) crystal arthritis had increased the risk of short (0-2 year) and long-term (2-10 year) non-fatal CV events compared with those without evidence of this acute crystalline arthritis. However, acute CPP crystal arthritis did not confer increased risk for all-cause mortality. This study focuses on an episode of acute calcium pyrophosphate (CPP) crystal arthritis as a significant clinical variable and is a valuable addition to the literature. However, some issues have not been addressed by the authors.
    First, epidemiologists agree that several clinical risk factors are associated with cardiovascular outcome, including acute cerebrovascular insufficiency, hyperparathyroidism, and phenotypes of CPP disease [2,3]. However, the authors did not exclude people with these risk factors, and an evaluation of these risk factors was not presented. The confounding effect of these variables may have contributed to the significant effect in causing cardiovascular disease.
    Second, it reported that longer disease duration of CPP crystal arthritis have also been considered to carry an elevated risk for cardiovascular disease [4]. Previous studies have clearly demonstrated that chronic CPP crystal arthritis did confer increased risk for myocardial infarction, acute coronary syndrome, and stroke[5]. However, the duration of CPP...

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    Conflict of Interest:
    None declared.