Related Experiment Videos
Changes in pulmonary venous flow patterns in patients with ventricular septal defect
1Department of Pediatrics, Nakadori General Hospital, 3-15, Misono-cho, Minami-dori, Akita 010-8577, Japan.
Pediatric Cardiology
|August 22, 2002
Summary
Ventricular septal defect in young children can alter pulmonary venous (PV) flow patterns. Symptomatic patients show significantly higher PV diastolic flow, suggesting a link to left-to-right shunting.
Area of Science:
- Pediatric Cardiology
- Cardiovascular Physiology
Background:
- Ventricular septal defect (VSD) is a common congenital heart anomaly.
- Altered hemodynamics in VSD can impact pulmonary venous return.
Purpose of the Study:
- To investigate pulmonary venous (PV) flow patterns in infants and young children with VSD.
- To correlate PV flow characteristics with clinical symptoms and hemodynamic parameters.
Main Methods:
- Doppler echocardiography was used to assess PV flow in 26 patients (<3 years old) with VSD.
- Patients were categorized into symptomatic (n=15) and asymptomatic (n=11) groups.
- Comparison was made with normal controls.
Main Results:
- Symptomatic VSD patients exhibited significantly increased peak diastolic PV flow velocity and flow velocity integral.
- Ratios of diastolic to systolic PV flow velocity and integral were significantly higher in symptomatic patients.
- These PV flow abnormalities correlated with elevated left atrial pressure (V wave) and increased left ventricular mass/atrial volume.
Conclusions:
- Abnormal pulmonary venous flow patterns in VSD are associated with significant left-to-right shunting.
- Elevated left atrial pressure (V wave) is a key factor contributing to these altered PV flow dynamics.