Two-dimensional echocardiography, Group medical examination, Electrocardiography, Left ventricular hypertrophy, Left ventricular function
The two-dimensional echocardiography (2-D echo) was used for group medical examination in 1162 cases (439 males, 723 females, mean age 59) who lived in relatively rural 7 areas in Japan. The incidence and severity of left ventricular hypertrophy (LVH) diagnosed by 2-D echo and ECG was compared. 1) LVH was more frequently detected in 2-D echo (218 cases) than ECG (95 cases) and agreement of both methods for diagnosis of LVH was low (43.6%). 2) The highest agreement between both methods was obtained when moderate/severe LVH by 2-D echo was compared with ECG findings of high voltage with ST/T change. Moreover, making diagnosis of asymmtrical septal hypertrophy (ASH) by ECG was suggested to be difficult. 3) In patients with moderate or severe LVH, more than 50% of ASH was recognized. 4) In patients with LVH diagnosed by 2-D echo, the ratio of VST and LVPWT was increased according to severity of LVH. Ejection fraction significantly decreased according to severity of LVH. 5) The 2-D echo thus provided more evident morphological and functional information in LVH, and would be of great value for assessing long term follow-up in cases with LVH and performing one of roles in preventive medicine.