Endocardial late potentials recorded during sinus rhythm in man: Incidence in different cardiac disease states

摘要: In a prospective study, 100 patients with various cardiac diseases not selected on the basis of previous ventricular arrhythmias underwent left endocardial mapping. With 10 different positions quadripolar catheter per patient, 90 showed late potentials. These findings were documented in 50 52 coronary heart disease compared to 26 34 dilative cardiomyopathy (p less than 0.025). Late potentials diastole most frequent type abnormal electrogram, found 82 patients. Fractionated electrograms 43 They seen 27 (52%) more often 8 (24%) Onset fractionated was somewhat later (301 +/- 177 ms after QRS) group (263 141 ms). The duration longer (189 114 ms) former latter (148 87 Thus, are uncommon diseases. occurrence and higher frequency may indicate inhomogeneous, patchy fibrosis ischemically diseased myocardium.