[Postoperative hemodynamic parameter follow-up in children with severe pulmonary resistance hypertension due to ventricular septal detect].

OBJECTIVE

To study the relationship between the age at operation and prognosis in children with severe pulmonary hypertension (PH) due to ventricular septal defect (VSD).

METHODS

Forty children with severe PH (increased total pulmonary circulation resistance)due to VSD were divided into two groups based on age at operation(Group I aged less than 2 years and group II more than 2 years). The hemodynamic parameter follow-up was measured by cardiac catheterization at presurgery, one week after surgery and 5-7 years postoperatively.

RESULTS

The ratio of pulmonary arterial pressure and systemic arterial pressure (pp/ps),pulmonary resistance and systemic resistance (R(p)/R(s)), and pulmonary vascular resistance (PVR) and small pulmonary arterial resistance (PAR) were significantly different in two groups (P<0.01). During follow-up in the group less than 2 years, all the hemodynamic parameters were at normal level, while in the group more than 2 years, only p(p)/p(s) and R(p)/R(s) were close to normal level. The pulmonary arterial resistance was still abnormal.

CONCLUSION

An early operation may be the only way to gain optimal long term result of surgery and decrease the incidence of pulmonary vascular disease in children with PH due to VSD.