Recurrent pericarditis has been reported in 25% to 50% of cases (1,2), and it is often the most troublesome and common complication of pericarditis (3). Recurrences are often cause of readmissions and repetition of diagnostic tests. Thus prevention of recurrences is a major therapeutic goal to improve the quality of life of patients and reduce management costs. Empiric anti-inflammatory therapies are mainstay of medical therapy, but have not been proven to be efficacious for the prevention of recurrences, with the possible exception of colchicine (4-6).
A systematic review was performed to assess the efficacy and safety of colchicine for pericarditis prevention. Randomised clinical trials on pharmacological prevention of pericarditis were included. Potentially relevant studies published up to December 2011 were searched in BioMedCentral, the Cochrane Collaboration Database of Randomised Trials (CENTRAL), ClinicalTrials.gov, EMBASE, Google Scholar, MEDLINE/PubMed, and Scopus. The PubMed search was performed with the term ‘pericarditis’ and ‘colchicine’. Recent (2005 or later) conference proceedings from the American Heart Association, American College of Cardiology, and the European Society of Cardiology were electronically or manually searched. Searches were not limited by language, sex, or age. In addition, references of retrieved studies were scanned for additional unpublished studies.
From the initial sample of 127 citations, five controlled clinical trials were finally included (795 patients) and are reported in the following table.Three studies were double-blind randomised controlled trials (7-9), and two studies were open-label randomised controlled trials (1,2). Trials followed patients for a mean of 13 months.Meta-analytic pooling showed that colchicine use was associated with a reduced risk of pericarditis during follow-up (RR 0.40, 95% CI 0.30 to 0.54) either for primary or secondary prevention without a significant higher risk of adverse events compared with placebo (RR 1.22, 95% CI 0.71 to 2.10), but more cases of drug withdrawals (RR 1.85, 95% CI 1.04 to 3.29).Gastro-intestinal intolerance is the most frequent side effect (mean incidence 8%), but no severe adverse events were recorded.
At present, this is the first comprehensive meta-analysis on this topic, including all published clinical trials up to December 2011.There are some limitations to be acknowledged. Some of the included trials were open label (1,2), which might have introduced bias; however findings were similar in open-label and placebo-controlled trials (7-9). Moreover all trials have independent blinded outcome assessment with very low or absent participant dropout, thus indicating studies of high quality. An additional potential limitation is that potentially heterogeneous populations (idiopathic, viral, postoperative pericarditis as well as pericarditis related to a systemic inflammatory disease) have been included, however the same treatment and preventive strategies are adopted and recommended for such patients, that are heterogeneous for etiology but homogenous for pericarditis medical therapy. Bacterial and neoplastic pericarditis has been excluded because requiring specific treatments.
Imazio M, Bobbio M, Cecchi E, et al. Colchicine in addition to conventional therapy for acute pericarditis: results of the COlchicine for acute PEricarditis (COPE) trial. Circulation 2005;112:2012-16.
Imazio M, Bobbio M, Cecchi E, et al. Colchicine as first-choice therapy for recurrent pericarditis: results of the CORE (COlchicine for REcurrent pericarditis) trial. Arch Intern Med 2005;165:1987-91.
Imazio M, Spodick DH, Brucato A, et al. Controversial issues in the management of pericardial diseases. Circulation 2010;121:916-28.
Imazio M. Pericardial involvement in systemic inflammatory diseases. Heart 2011;97:1882-92.Adler Y, Finkelstein Y, Guindo J, et al. Colchicine treatment for recurrent pericarditis: a decade of experience. Circulation 1998;97:2183-5.
Imazio M, Brucato A, Trinchero R, et al. Colchicine for pericarditis: hype or hope? Eur Heart J 2009;30:532-9.Finkelstein Y, Shemesh J, Mahlab K, et al. Colchicine for the prevention of postpericardiotomy syndrome. Herz 2002;27:791-4.
Imazio M, Trinchero R, Brucato A, et al; COPPS Investigators. COlchicine for the Prevention of the Post-pericardiotomy Syndrome (COPPS): a multicentre, randomized, double-blind, placebo-controlled trial. Eur Heart J 2010;31:2749-54.
Imazio M, Brucato A, Cemin R, et al; CORP Investigators. COlchicine for recurrent pericarditis (CORP). A randomized, controlled trial. Ann Intern Med 2011;155:409-14.
Maisch B, Seferovic PM, Ristic AD, et al; Task Force on the Diagnosis and Management of Pericardial Diseases of the European Society of Cardiology. Guidelines on the diagnosis and management of pericardial diseases. Eur Heart J 2004;25:587-610.
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