Pericarditis causes a characteristic " saddleback" ST segment elevation and PR segment depression in all leads except aVR and V1, where the reverse - ST depression and PR elevation – are seen.

心包炎导致除aVR和V1外的所有导联，均呈特征性“鞍背” ST段抬高和PR段下降，aVR和V1可见ST段压低和PR段抬高。