Which of the following statements about VSD is/are correct?
A. A large VSD is approximately the size of the pulmonary valve orifice or larger.
B. Large VSDs associated with high pulmonary blood flow result in an enlarged left atrium on chest x-ray.
C. Patients with small (restrictive) VSDs tend to have normal right ventricular and pulmonary arterial pressures with normal pulmonary vascular resistance and no evidence of pulmonary vascular disease.
D. A pulmonary vascular resistance greater than 10 to 12 units per sq. m. is considered a contraindication to operation.
Answer:B
Which of the following statements about VSD is/are correct?
A. A large VSD is approximately the size of the pulmonary valve orifice or larger. B. Large VSDs associated with high pulmonary blood flow result in an enlarged left atrium on chest x-ray. C. Patients with small (restrictive) VSDs tend to have normal right ventricular and pulmonary arterial pressures with normal pulmonary vascular resistance and no evidence of pulmonary vascular disease. D. A pulmonary vascular resistance greater than 10 to 12 units per sq. m. is considered a contraindication to operation.