TY - RPRT TI - Ventricular fibrillation masked by the implanted unipolar pacemaker. AU - W M Gersony AU - G F Geisler AU - W R Webb PY - 1969 DO - 10.1378/chest.55.6.503 UR - https://pubmed.ncbi.nlm.nih.gov/5786343/ ID - 5786343 ER -