laboratory values can show increased urea (bun), or increased blood creatinine in cases of uremic pericarditis. generally however, laboratory values are normal, but if there is a concurrent myocardial infarction (heart attack) or great stress to the heart, laboratory values may show increased cardiac markers like troponin (i, t), ck-mb, myoglobin, and ldh1 (lactase dehydrogenase isotype 1).