A man was undergoing treatment for a myocardial infarction. On day 13, his chest pain increased and he developed shortness of breath. Objectively, the following is observed: temperature-38.2° C, pulse respiration rate 112 / min.,26 / min., fine bubbling crackles can be heard under the right shoulder blade. On day 15, he was diagnosed with right-sided exudative pleurisy. Complete blood count shows the following: leukocytes – 8.9*109/L, eosinophils-8 %. ESR-24 mm/hour. What complication of myocardial infarction occurred in this patient?