...awareness, treatment, and control rate of hypertension is much lower in surveyed residents than national level. ...Park and Chon explored the effectiveness of combination of cardiothoracic ratio (CTR) in chest X-ray and well-known risk factors besides electrocardiography in asymptomatic hypertensive individuals. ...although the awareness and control of hypertension have been promoted in the real world, the prevalence of this disease has not experienced a significant decrease or is even extremely high in surveyed area. ...it is an urgent task for us to mount a comprehensive attack on hypertensive heart disease, harnessing all available resources to slow, arrest, and possibly even reverse the epidemic of hypertension.