Inflammation of both the heart muscle (myocardium) and the membrane that surrounds it (pericardium), typically from infection or autoimmune disease.
From cardio- (heart), peri- (around), carditis (-itis, inflammation). Combines terms to specify dual-layer cardiac inflammation in medical usage.
Your heart has three layers—inner, muscle, outer—and when inflammation hits both the middle and outer layers, it's like your heart is being squeezed from the inside and outside simultaneously.
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