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FIG. 1 (A)ClassicA 23-year-old man developed increasing pleuritic left chest pain for 12 hours following attempted suicide with a nail gun.Electrocardiogram (Fig. 1A) showed classic stage one J-ST-and PR-segment deviations of acute pericarditis. Chest roentgenogram (Fig. iB) showed two nails penetrating the chest wall and cardiopericardial silhouette. They and 40 ml blood were removed from the pencarhum. ReferenceSpodick DH: Electrocardiographic Abnomdities in Pericardial Disease (Chapter 5). In Spodick DH: