[Long-term follow-up of clinical features and ECG changes in 50 patients with HCM].
We studied the relation of ECG changes during the clinical course in patients with hypertrophic cardiomyopathy (HCM). Fifty patients with HCM were categorized in two groups; 20 patients with, and 30 patients without signs of deterioration of clinical state. The changes between the first and the final ECG were compared in these two groups. The average follow-up period was 7.6 years. Twenty patients with clinical deterioration presented increase in QRS intervals (0.06----0.071 sec, p less than 0.025), decrease in voltage of RV5 (2.81----2.38 sec, p less than 0.025), increase in newly developed abnormal Q waves, and P wave changes. In contrast to these cases, 30 patients without clinical deterioration presented no significant ECG changes. Amplitudes of the negative T wave were unchanged in both groups. We conclude that electrocardiographic observations proved to be useful for predicting clinical features in patients with HCM.
Kawahara
Y
Y
Department of Cardiology, Kawasaki Medical School.
Sawayama
T
T
Nezuo
S
S
Hasegawa
K
K
Nakamura
T
T
Inoue
S
S
Tamura
K
K
Tanaka
J
J
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002312:Cardiomyopathy, Hypertrophic / Q000145:classification / Q000175:diagnosis* / Q000503:physiopathology; D002648:Child; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D013997:Time Factors