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These findings were documented in 50 of 52 patients with coronary heart disease compared to 26 of 34 patients with dilative cardiomyopathy (p&lt;0.025). Late potentials in diastole were the most frequent type of abnormal electrogram, found in 82 patients. Fractionated electrograms were documented in 43 patients. They were seen in 27 (52%) coronary patients more often than in 8 (24%) patients with dilative cardiomyopathy (p&lt;0.025). Onset of fractionated electrograms in coronary patients was somewhat later (301 \u00b1 177 ms after the QRS) than in the cardiomyopathy group (263 \u00b1 141 ms). The duration was longer (189 \u00b1114 ms) in the former group than in the latter (148\u00b187 ms). Thus, endocardial late potentials are not uncommon in patients with various cardiac diseases. The more frequent occurrence in coronary heart disease and the higher frequency of fractionated electrograms may indicate a more inhomogeneous, patchy type of fibrosis in the ischemically diseased myocardium.<\/jats:p>","DOI":"10.1002\/clc.4960110309","type":"journal-article","created":{"date-parts":[[2009,2,5]],"date-time":"2009-02-05T06:30:08Z","timestamp":1233815408000},"page":"164-174","source":"Crossref","is-referenced-by-count":3,"title":["Endocardial late potentials recorded during sinus rhythm in man: Incidence in different cardiac disease 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