Epidemiology of Chd Etiology The cause of most chd is unknown Genetic factors play some role in CHD About eight percent of cases result mainly from genetic factors. The heart defect is usually part of a chromosomal disorder such as Down's syndrome. However, no specific gene locus for CHD has been identified
Epidemiology of CHD Etiology The cause of most CHD is unknown. Genetic factors play some role in CHD. About eight percent of cases result mainly from genetic factors. The heart defect is usually part of a chromosomal disorder such as Down's syndrome. However, no specific gene locus for CHD has been identified
Epidemiology of Chd Etiology A child born to a parent with Chd has a substantial!大体上 increased likelihood of having a similar congenital lesion The risk may be as high as 15 percent. For certain lesions, there appears to be a greater risk of transmission from the mother than from the father
Epidemiology of CHD Etiology A child born to a parent with CHD has a substantially大体上increased likelihood of having a similar congenital lesion. The risk may be as high as 15 percent. For certain lesions, there appears to be a greater risk of transmission from the mother than from the father
Epidemiology of Chd Etiology About two percent of cases of Chd are primarily the result of environmental or external factors Such factors include rube]a风疹 infection and ingestion of certain drugs, such as lithium#. CHD is a prominent component of the fetal alcohol syndrome The etiologic role of other agents, such as anticonvulsant medications and exogenous 外源 female sex hormones, is uncertain
Epidemiology of CHD Etiology About two percent of cases of CHD are primarily the result of environmental or external factors. Such factors include rubella风疹infection and ingestion of certain drugs, such as lithium锂. CHD is a prominent component of the fetal alcohol syndrome. The etiologic role of other agents, such as anticonvulsant medications and exogenous 外源female sex hormones, is uncertain
Noninvasive Diagnostic Studies Chest X ray a The location of the heart The size of the heart e The relationship between heart and great vessel the blood flow of the lung
Noninvasive Diagnostic Studies Chest X ray The location of the heart The size of the heart The relationship between heart and great vessel The blood flow of the lung
Trachea ANT Clavicle SVC SYC Ao PA AA - Knobof Right aortic arch LC pulmonary LCX arter RCA LAD Righ LEx pulmonary LA pulmonary artery HIS- artery RCA PDA Right- ArM pulmonary art (lower lobe) LY Right border of heart Diaphragm Breast shadow Inferior vena cava Apex of he Stomach bubble