请输入您要查询的百科知识:

 

词条 Pulmonic stenosis
释义

  1. Pathophysiology

  2. Treatment

  3. References

  4. External links

{{Hatnote|Pulmonary valve stenosis is a type of pulmonic stenosis.}}{{Infobox medical condition (new)
| name =
| synonym =
| image =
| image_size =
| alt =
| caption =
| pronounce =
| specialty = cardiology
| symptoms =
| complications =
| onset =
| duration =
| types =
| causes =
| risks =
| diagnosis =
| differential =
| prevention =
| treatment =
| medication =
| prognosis =
| frequency =
| deaths =
}}

Pulmonic stenosis, also known as pulmonary stenosis, is a dynamic or fixed obstruction of flow from the right ventricle of the heart to the pulmonary artery. It is usually first diagnosed in childhood.

Pulmonic stenosis is usually due to isolated valvular obstruction (pulmonary valve stenosis), but it may be due to subvalvular or supravalvular obstruction, such as infundibular stenosis. It may occur in association with other congenital heart defects as part of more complicated syndromes (for example, tetralogy of Fallot).

Pathophysiology

When pulmonic stenosis (PS) is present, resistance to blood flow causes right ventricular hypertrophy. If right ventricular failure develops, right atrial pressure will increase, and this may result in a persistent opening of the foramen ovale, shunting of unoxygenated blood from the right atrium into the left atrium, and systemic cyanosis. If pulmonary stenosis is severe, congestive heart failure occurs, and systemic venous engorgement will be noted. An associated defect such as a patent ductus arteriosus partially compensates for the obstruction by shunting blood from the left ventricle to the aorta then back to the pulmonary artery (as a result of the higher pressure in the left ventricle) and back into the lungs.

Treatment

The treatment of choice is percutaneous balloon valvuloplasty and is done when a resting peak gradient is seen to be >60mm Hg or a mean >40mm Hg is observed.

References

  • Ren (Jul. 15, 2009). Pulmonic Stenosis. eMedicine Specialties > Cardiology > Valvular Heart Disease.
  • Hockenberry, M. J., & Wilson, D. (2009). Wong's essentials of pediatric nursing. (8 ed., Vol. 1, p. 872). St. Louis, Missouri: Mosby.

External links

  • Pulmonary stenosis information for parents.

1 : Valvular heart disease

随便看

 

开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。

 

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间:2024/11/11 4:59:11