290 cases of atrial fibrillation were abstracted among 9355 adult patients who had been traced ECG at ECG room in HAN YANG UNIVERSITY HOSPITAL from sept. ´74 to sept. ´77.
Author´s clinical observation was focused on the .192 cases who had been traced as in-patient in this hospital.
The results were as follows;
1. The incidence of AlP was 3. 1% in all patients and it was 2. 1% in admitted patients.
2. Sex distribution showed no significant difference and the.majority of patients(65. 7%) were observed over fourth decade.
The average rates of ventricular ´responses to A/F were variable, 58 of patients, had ventricular responses to A/F ranging from 101 to 140 per minute.
4. Associated ECG findings of A/F were L. V. H. (24%), V.P.C. (21.4%), R.V.H. (16.7%), ischemia (9, 4%), L. V. Strain both V. H. (4.7%) and myocardial infarction(3.1%) in the order of frequency 46.4% of patients showed AIF without assoiated findings and 14.1% of patients had A/F-F.
5. Rheumatic valvular H. D. hypertension and arteriosclerosis were the significant underlying diseases of A/F, which occupied 39.6%, 31.8% and 15.1%, of each, respectively. Hyperthyroidism and syphilis were less common underlying diseases, the frequency showing 2. 1% and 0.5% of each, respectively. Undetermined cases occupied 7 M.
6. 67.2% of patients with A/F had complications, such as C. H. F. (45.3%), embolization (19.8%) and SBE (2. 1%). Predilection site of embolization was brain (12%). Other sites were extremity (2.6%), kidney (1. 6%) and mesentery (0.5%)
7. The most frequent underlying diseases of C.H.F. in A/F were rheumatic valvular H. D., hypertension and -arteriosclerosis which included 73 cases out of 87 cases of C. H. F. And predom.inant underlying disease of embolization in A/F was rheumatic valvular H. D. especially M. S. and M. S.I. 24 cases (18.6%) had combined complications.
8. 159 cases among 192 cases were treated with digitalis, quinidine, electric D/C shock and/or combination of them 127 cases out of 142 digitalized patients were effective clinically. But, conversion to R. S. R. by ECG was observed in 12 cases. of digitalized patients, 7 cases of quinidine treated patients and 1 case of ectroversion. 9 cases among these 20 converted patients were readmitted with A/F within one year after discharge.
9. 13 cases of A/F with rheumatic valvular H. D. were examined by echocardiography.
The mean value of echocardiographic left atrial dimension was 47. 1 mm wich was a markedly increased value , compared with a normal value (29mm:1940mm).
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